diff --git a/dumux/freeflow/stokes/stokesmodel.hh b/dumux/freeflow/stokes/stokesmodel.hh
index caf7a42a5eac82489fe1ca29cb595ad64ae8fab2..f235da44e99ec89bacc8c26e8a46087d2fac856b 100644
--- a/dumux/freeflow/stokes/stokesmodel.hh
+++ b/dumux/freeflow/stokes/stokesmodel.hh
@@ -147,7 +147,7 @@ public:
 
         // create the required scalar fields
         unsigned numVertices = this->gridView_().size(dim);
-        ScalarField &pN = *writer.allocateManagedBuffer(numVertices);
+        ScalarField &pn = *writer.allocateManagedBuffer(numVertices);
         ScalarField &delP = *writer.allocateManagedBuffer(numVertices);
         ScalarField &rho = *writer.allocateManagedBuffer(numVertices);
         ScalarField &mu = *writer.allocateManagedBuffer(numVertices);
@@ -181,14 +181,14 @@ public:
                                i,
                                false);
 
-                pN[globalIdx] = volVars.pressure();
+                pn[globalIdx] = volVars.pressure();
                 delP[globalIdx] = volVars.pressure() - 1e5;
                 rho[globalIdx] = volVars.density();
                 mu[globalIdx] = volVars.dynamicViscosity();
                 velocity[globalIdx] = volVars.velocity();
             }
         }
-        writer.attachVertexData(pN, "P");
+        writer.attachVertexData(pn, "P");
         writer.attachVertexData(delP, "delP");
         writer.attachVertexData(rho, "rho");
         writer.attachVertexData(mu, "mu");
diff --git a/dumux/freeflow/stokes2c/stokes2cmodel.hh b/dumux/freeflow/stokes2c/stokes2cmodel.hh
index 8d1e815dd3f83956a659da60952a4d9a71786f37..8aacb7c671b3229a978f41c4c752169e27d14393 100644
--- a/dumux/freeflow/stokes2c/stokes2cmodel.hh
+++ b/dumux/freeflow/stokes2c/stokes2cmodel.hh
@@ -96,7 +96,7 @@ public:
 
         // create the required scalar fields
         unsigned numVertices = this->gridView_().size(dim);
-        ScalarField &pN = *writer.allocateManagedBuffer(numVertices);
+        ScalarField &pn = *writer.allocateManagedBuffer(numVertices);
         ScalarField &delP = *writer.allocateManagedBuffer(numVertices);
         ScalarField &Xw = *writer.allocateManagedBuffer(numVertices);
         ScalarField &rho = *writer.allocateManagedBuffer(numVertices);
@@ -131,7 +131,7 @@ public:
                                i,
                                false);
 
-                pN[globalIdx] = volVars.pressure()*scale_;
+                pn[globalIdx] = volVars.pressure()*scale_;
                 delP[globalIdx] = volVars.pressure()*scale_ - 1e5;
                 Xw[globalIdx] = volVars.fluidState().massFraction(phaseIdx, transportCompIdx);
                 rho[globalIdx] = volVars.density()*scale_*scale_*scale_;
@@ -140,7 +140,7 @@ public:
                 velocity[globalIdx] *= 1/scale_;
             }
         }
-        writer.attachVertexData(pN, "P");
+        writer.attachVertexData(pn, "P");
         writer.attachVertexData(delP, "delP");
         std::ostringstream outputNameX;
         outputNameX << "X^" << FluidSystem::componentName(transportCompIdx);
diff --git a/dumux/freeflow/stokes2cni/stokes2cnimodel.hh b/dumux/freeflow/stokes2cni/stokes2cnimodel.hh
index b817cbc369fa3989434bc8d60715bb921f5df536..e9de43616f8043473f928a1ce99f890d0e3f32b8 100644
--- a/dumux/freeflow/stokes2cni/stokes2cnimodel.hh
+++ b/dumux/freeflow/stokes2cni/stokes2cnimodel.hh
@@ -104,7 +104,7 @@ public:
 
         // create the required scalar fields
         unsigned numVertices = this->gridView_().size(dim);
-        ScalarField &pN = *writer.allocateManagedBuffer(numVertices);
+        ScalarField &pn = *writer.allocateManagedBuffer(numVertices);
         ScalarField &delP = *writer.allocateManagedBuffer(numVertices);
         ScalarField &Xw = *writer.allocateManagedBuffer(numVertices);
         ScalarField &T = *writer.allocateManagedBuffer(numVertices);
@@ -142,7 +142,7 @@ public:
                                vertexIdx,
                                false);
 
-                pN  [globalIdx] = volVars.pressure();
+                pn  [globalIdx] = volVars.pressure();
                 delP[globalIdx] = volVars.pressure() - 1e5;
                 Xw  [globalIdx] = volVars.fluidState().massFraction(phaseIdx, transportCompIdx);
                 T   [globalIdx] = volVars.temperature();
@@ -153,7 +153,7 @@ public:
                 velocity[globalIdx] = volVars.velocity();
             }
         }
-        writer.attachVertexData(pN, "pg");
+        writer.attachVertexData(pn, "pg");
         writer.attachVertexData(delP, "delP");
 //        writer.attachVertexData(D, "Dwg");
         std::ostringstream outputNameX;
diff --git a/dumux/implicit/2p/2pindices.hh b/dumux/implicit/2p/2pindices.hh
index d3df9e6a7268ac88de277d868ae5ebee313a6719..e007d6e7af45aafc45e62ef7207bf81176d0d085 100644
--- a/dumux/implicit/2p/2pindices.hh
+++ b/dumux/implicit/2p/2pindices.hh
@@ -34,15 +34,15 @@ namespace Dumux
 /*!
  * \ingroup TwoPBoxModel
  * \ingroup ImplicitIndices
- * \brief Specificy whether a pw-Sn or a pn-Sw formulation is used.
+ * \brief Specificy whether a pw-sn or a pn-sw formulation is used.
  */
 struct TwoPFormulation
 {
-    static const int pwsn = 0; //!< Pw and Sn as primary variables
+    static const int pwsn = 0; //!< pw and sn as primary variables
     DUNE_DEPRECATED_MSG("use pwsn (uncapitalized 'S') instead") 
     static const int pwSn = pwsn; //!< \deprecated
 
-    static const int pnsw = 1; //!< Pn and Sw as primary variables
+    static const int pnsw = 1; //!< pn and sw as primary variables
     DUNE_DEPRECATED_MSG("use pnsw (uncapitalized 'S') instead") 
     static const int pnSw = pnsw; //!< \deprecated
 };
diff --git a/dumux/implicit/2p/2pmodel.hh b/dumux/implicit/2p/2pmodel.hh
index 3d64da3563e44488cdd0006103425fa6d32c7c80..eabbd11bc8cd7e71e4b43b0483fcb957b51dc472 100644
--- a/dumux/implicit/2p/2pmodel.hh
+++ b/dumux/implicit/2p/2pmodel.hh
@@ -121,11 +121,11 @@ public:
         unsigned numDofs = this->numDofs();
 
         // create the required scalar fields
-        ScalarField *pW = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pN = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pC = writer.allocateManagedBuffer(numDofs);
-        ScalarField *Sw = writer.allocateManagedBuffer(numDofs);
-        ScalarField *Sn = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pw = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pn = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pc = writer.allocateManagedBuffer(numDofs);
+        ScalarField *sw = writer.allocateManagedBuffer(numDofs);
+        ScalarField *sn = writer.allocateManagedBuffer(numDofs);
         ScalarField *rhoW = writer.allocateManagedBuffer(numDofs);
         ScalarField *rhoN = writer.allocateManagedBuffer(numDofs);
         ScalarField *mobW = writer.allocateManagedBuffer(numDofs);
@@ -169,11 +169,11 @@ public:
             {
                 int globalIdx = this->dofMapper().map(*elemIt, scvIdx, dofCodim);
 
-                (*pW)[globalIdx] = elemVolVars[scvIdx].pressure(wPhaseIdx);
-                (*pN)[globalIdx] = elemVolVars[scvIdx].pressure(nPhaseIdx);
-                (*pC)[globalIdx] = elemVolVars[scvIdx].capillaryPressure();
-                (*Sw)[globalIdx] = elemVolVars[scvIdx].saturation(wPhaseIdx);
-                (*Sn)[globalIdx] = elemVolVars[scvIdx].saturation(nPhaseIdx);
+                (*pw)[globalIdx] = elemVolVars[scvIdx].pressure(wPhaseIdx);
+                (*pn)[globalIdx] = elemVolVars[scvIdx].pressure(nPhaseIdx);
+                (*pc)[globalIdx] = elemVolVars[scvIdx].capillaryPressure();
+                (*sw)[globalIdx] = elemVolVars[scvIdx].saturation(wPhaseIdx);
+                (*sn)[globalIdx] = elemVolVars[scvIdx].saturation(nPhaseIdx);
                 (*rhoW)[globalIdx] = elemVolVars[scvIdx].density(wPhaseIdx);
                 (*rhoN)[globalIdx] = elemVolVars[scvIdx].density(nPhaseIdx);
                 (*mobW)[globalIdx] = elemVolVars[scvIdx].mobility(wPhaseIdx);
@@ -187,11 +187,11 @@ public:
             velocityOutput.calculateVelocity(*velocityN, elemVolVars, fvGeometry, *elemIt, nPhaseIdx);
         }
 
-        writer.attachDofData(*Sn, "Sn", isBox);
-        writer.attachDofData(*Sw, "Sw", isBox);
-        writer.attachDofData(*pN, "pn", isBox);
-        writer.attachDofData(*pW, "pw", isBox);
-        writer.attachDofData(*pC, "pc", isBox);
+        writer.attachDofData(*sn, "sn", isBox);
+        writer.attachDofData(*sw, "sw", isBox);
+        writer.attachDofData(*pn, "pn", isBox);
+        writer.attachDofData(*pw, "pw", isBox);
+        writer.attachDofData(*pc, "pc", isBox);
         writer.attachDofData(*rhoW, "rhoW", isBox);
         writer.attachDofData(*rhoN, "rhoN", isBox);
         writer.attachDofData(*mobW, "mobW", isBox);
diff --git a/dumux/implicit/2p/2pvolumevariables.hh b/dumux/implicit/2p/2pvolumevariables.hh
index de0fd13827f0789ad3330d085e55cf852a608f5f..19159e7252d198183cc39ab7ebda11b0025d19ff 100644
--- a/dumux/implicit/2p/2pvolumevariables.hh
+++ b/dumux/implicit/2p/2pvolumevariables.hh
@@ -130,24 +130,24 @@ public:
 
 
         if (int(formulation) == pwsn) {
-            Scalar Sn = priVars[saturationIdx];
-            fluidState.setSaturation(nPhaseIdx, Sn);
-            fluidState.setSaturation(wPhaseIdx, 1 - Sn);
+            Scalar sn = priVars[saturationIdx];
+            fluidState.setSaturation(nPhaseIdx, sn);
+            fluidState.setSaturation(wPhaseIdx, 1 - sn);
 
-            Scalar pW = priVars[pressureIdx];
-            fluidState.setPressure(wPhaseIdx, pW);
+            Scalar pw = priVars[pressureIdx];
+            fluidState.setPressure(wPhaseIdx, pw);
             fluidState.setPressure(nPhaseIdx,
-                                   pW + MaterialLaw::pc(materialParams, 1 - Sn));
+                                   pw + MaterialLaw::pc(materialParams, 1 - sn));
         }
         else if (int(formulation) == pnsw) {
-            Scalar Sw = priVars[saturationIdx];
-            fluidState.setSaturation(wPhaseIdx, Sw);
-            fluidState.setSaturation(nPhaseIdx, 1 - Sw);
+            Scalar sw = priVars[saturationIdx];
+            fluidState.setSaturation(wPhaseIdx, sw);
+            fluidState.setSaturation(nPhaseIdx, 1 - sw);
 
-            Scalar pN = priVars[pressureIdx];
-            fluidState.setPressure(nPhaseIdx, pN);
+            Scalar pn = priVars[pressureIdx];
+            fluidState.setPressure(nPhaseIdx, pn);
             fluidState.setPressure(wPhaseIdx,
-                                   pN - MaterialLaw::pc(materialParams, Sw));
+                                   pn - MaterialLaw::pc(materialParams, sw));
         }
 
         typedef typename GET_PROP_TYPE(TypeTag, FluidSystem) FluidSystem;
diff --git a/dumux/implicit/2p2c/2p2cindices.hh b/dumux/implicit/2p2c/2p2cindices.hh
index d8efd62178eb17df6854aae4beff13c16d912d9b..4d433729e845635a7801f905cd06f90fc377899e 100644
--- a/dumux/implicit/2p2c/2p2cindices.hh
+++ b/dumux/implicit/2p2c/2p2cindices.hh
@@ -37,11 +37,11 @@ namespace Dumux
  */
 struct TwoPTwoCFormulation
 {
-    static const int pwsn = 0; //!< Pw and Sn as primary variables
+    static const int pwsn = 0; //!< pw and sn as primary variables
     DUNE_DEPRECATED_MSG("use pwsn (uncapitalized 'S') instead") 
     static const int pwSn = pwsn; //!< \deprecated
 
-    static const int pnsw = 1; //!< Pn and Sw as primary variables
+    static const int pnsw = 1; //!< pn and sw as primary variables
     DUNE_DEPRECATED_MSG("use pnsw (uncapitalized 'S') instead") 
     static const int pnSw = pnsw; //!< \deprecated
 };
@@ -94,7 +94,7 @@ public:
 /*!
  * \ingroup TwoPTwoCModel
  * \ingroup ImplicitIndices
- * \brief The indices for the isothermal TwoPTwoC model in the pn-Sw
+ * \brief The indices for the isothermal TwoPTwoC model in the pn-sw
  *        formulation.
  *
  * \tparam PVOffset The first index in a primary variable vector.
diff --git a/dumux/implicit/2p2c/2p2cmodel.hh b/dumux/implicit/2p2c/2p2cmodel.hh
index fc25f97ce6577d21ceda802f1d687d752cdd84ef..afce2cdd5ce86552e9a6168a8af4466c6e1371ed 100644
--- a/dumux/implicit/2p2c/2p2cmodel.hh
+++ b/dumux/implicit/2p2c/2p2cmodel.hh
@@ -295,9 +295,9 @@ public:
         // create the required scalar fields
         ScalarField *sN    = writer.allocateManagedBuffer(numDofs);
         ScalarField *sW    = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pN    = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pW    = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pC    = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pn    = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pw    = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pc    = writer.allocateManagedBuffer(numDofs);
         ScalarField *rhoW  = writer.allocateManagedBuffer(numDofs);
         ScalarField *rhoN  = writer.allocateManagedBuffer(numDofs);
         ScalarField *mobW  = writer.allocateManagedBuffer(numDofs);
@@ -348,9 +348,9 @@ public:
 
                 (*sN)[globalIdx]    = elemVolVars[scvIdx].saturation(nPhaseIdx);
                 (*sW)[globalIdx]    = elemVolVars[scvIdx].saturation(wPhaseIdx);
-                (*pN)[globalIdx]    = elemVolVars[scvIdx].pressure(nPhaseIdx);
-                (*pW)[globalIdx]    = elemVolVars[scvIdx].pressure(wPhaseIdx);
-                (*pC)[globalIdx]    = elemVolVars[scvIdx].capillaryPressure();
+                (*pn)[globalIdx]    = elemVolVars[scvIdx].pressure(nPhaseIdx);
+                (*pw)[globalIdx]    = elemVolVars[scvIdx].pressure(wPhaseIdx);
+                (*pc)[globalIdx]    = elemVolVars[scvIdx].capillaryPressure();
                 (*rhoW)[globalIdx]  = elemVolVars[scvIdx].fluidState().density(wPhaseIdx);
                 (*rhoN)[globalIdx]  = elemVolVars[scvIdx].fluidState().density(nPhaseIdx);
                 (*mobW)[globalIdx]  = elemVolVars[scvIdx].mobility(wPhaseIdx);
@@ -375,11 +375,11 @@ public:
 
         } // loop over elements
 
-        writer.attachDofData(*sN,     "Sn", isBox);
-        writer.attachDofData(*sW,     "Sw", isBox);
-        writer.attachDofData(*pN,     "pN", isBox);
-        writer.attachDofData(*pW,     "pW", isBox);
-        writer.attachDofData(*pC,     "pC", isBox);
+        writer.attachDofData(*sN,     "sn", isBox);
+        writer.attachDofData(*sW,     "sw", isBox);
+        writer.attachDofData(*pn,     "pn", isBox);
+        writer.attachDofData(*pw,     "pw", isBox);
+        writer.attachDofData(*pc,     "pc", isBox);
         writer.attachDofData(*rhoW,   "rhoW", isBox);
         writer.attachDofData(*rhoN,   "rhoN", isBox);
         writer.attachDofData(*mobW,   "mobW", isBox);
@@ -634,7 +634,7 @@ public:
                 wouldSwitch = true;
                 // nonwetting phase disappears
                 std::cout << "Nonwetting phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sn: "
+                          << ", coordinates: " << globalPos << ", sn: "
                           << volVars.saturation(nPhaseIdx) << std::endl;
                 newPhasePresence = wPhaseOnly;
 
@@ -646,7 +646,7 @@ public:
                 wouldSwitch = true;
                 // wetting phase disappears
                 std::cout << "Wetting phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sw: "
+                          << ", coordinates: " << globalPos << ", sw: "
                           << volVars.saturation(wPhaseIdx) << std::endl;
                 newPhasePresence = nPhaseOnly;
 
diff --git a/dumux/implicit/2p2c/2p2cpropertydefaults.hh b/dumux/implicit/2p2c/2p2cpropertydefaults.hh
index 488936adc5cf2fa093ab4cde5109cf8122dda4ed..6aa279c55aca97f5503cf6016fd80acc4ad913ba 100644
--- a/dumux/implicit/2p2c/2p2cpropertydefaults.hh
+++ b/dumux/implicit/2p2c/2p2cpropertydefaults.hh
@@ -84,7 +84,7 @@ SET_PROP(TwoPTwoC, NumPhases)
 
 SET_INT_PROP(TwoPTwoC, NumEq, 2); //!< set the number of equations to 2
 
-//! Set the default formulation to pw-Sn
+//! Set the default formulation to pw-sn
 SET_INT_PROP(TwoPTwoC,
              Formulation,
              TwoPTwoCFormulation::pwsn);
diff --git a/dumux/implicit/2p2c/2p2cvolumevariables.hh b/dumux/implicit/2p2c/2p2cvolumevariables.hh
index 03318c6d3b225cab0a671fab2e16c607d08fbd3a..537090802e15fd66d6c42fdc33411caec045816b 100644
--- a/dumux/implicit/2p2c/2p2cvolumevariables.hh
+++ b/dumux/implicit/2p2c/2p2cvolumevariables.hh
@@ -192,22 +192,22 @@ public:
         /////////////
         // set the saturations
         /////////////
-        Scalar Sn;
+        Scalar sn;
         if (phasePresence == nPhaseOnly)
-            Sn = 1.0;
+            sn = 1.0;
         else if (phasePresence == wPhaseOnly) {
-            Sn = 0.0;
+            sn = 0.0;
         }
         else if (phasePresence == bothPhases) {
             if (formulation == pwsn)
-                Sn = priVars[switchIdx];
+                sn = priVars[switchIdx];
             else if (formulation == pnsw)
-                Sn = 1.0 - priVars[switchIdx];
+                sn = 1.0 - priVars[switchIdx];
             else DUNE_THROW(Dune::InvalidStateException, "Formulation: " << formulation << " is invalid.");
         }
         else DUNE_THROW(Dune::InvalidStateException, "phasePresence: " << phasePresence << " is invalid.");
-        fluidState.setSaturation(wPhaseIdx, 1 - Sn);
-        fluidState.setSaturation(nPhaseIdx, Sn);
+        fluidState.setSaturation(wPhaseIdx, 1 - sn);
+        fluidState.setSaturation(nPhaseIdx, sn);
 
         /////////////
         // set the pressures of the fluid phases
@@ -216,15 +216,15 @@ public:
         // calculate capillary pressure
         const MaterialLawParams &materialParams =
             problem.spatialParams().materialLawParams(element, fvGeometry, scvIdx);
-        Scalar pC = MaterialLaw::pc(materialParams, 1 - Sn);
+        Scalar pc = MaterialLaw::pc(materialParams, 1 - sn);
 
         if (formulation == pwsn) {
             fluidState.setPressure(wPhaseIdx, priVars[pressureIdx]);
-            fluidState.setPressure(nPhaseIdx, priVars[pressureIdx] + pC);
+            fluidState.setPressure(nPhaseIdx, priVars[pressureIdx] + pc);
         }
         else if (formulation == pnsw) {
             fluidState.setPressure(nPhaseIdx, priVars[pressureIdx]);
-            fluidState.setPressure(wPhaseIdx, priVars[pressureIdx] - pC);
+            fluidState.setPressure(wPhaseIdx, priVars[pressureIdx] - pc);
         }
         else DUNE_THROW(Dune::InvalidStateException, "Formulation: " << formulation << " is invalid.");
 
diff --git a/dumux/implicit/2pdfm/2pdfmlocalresidual.hh b/dumux/implicit/2pdfm/2pdfmlocalresidual.hh
index 871674664bfa2eb155e9967c98ec7a639f3a3219..a11af4fe9acb89e9ae63fb934a3378a9ba020b4a 100644
--- a/dumux/implicit/2pdfm/2pdfmlocalresidual.hh
+++ b/dumux/implicit/2pdfm/2pdfmlocalresidual.hh
@@ -121,17 +121,17 @@ public:
         const Element &elem = this->element_();
         bool isFracture = this->problem_().spatialParams().isVertexFracture(elem, scvIdx);
         /*
-         * Sn = w_F * SnF + w_M * SnM
-         * First simple case before determining the real w_F is to assume that it is 0
-         * and w_M = 1
+         * sn = wf * SnF + wm * SnM
+         * First simple case before determining the real wf is to assume that it is 0
+         * and wm = 1
          *
          */
         ///////////////////////////////////////////////////////////////////////
-        Scalar w_F, w_M; //volumetric fractions of fracture and matrix;
+        Scalar wf, wm; //volumetric fractions of fracture and matrix;
         Scalar fractureVolume = 0.0;
-        w_F = 0.0;
+        wf = 0.0;
         /*
-         * Calculate the fracture volume fraction w_F = 0.5 * Fwidth * 0.5 * Length
+         * Calculate the fracture volume fraction wf = 0.5 * Fwidth * 0.5 * Length
          */
         Dune::GeometryType gt = elem.geometry().type();
         const typename Dune::GenericReferenceElementContainer<DT,dim>::value_type&
@@ -160,8 +160,8 @@ public:
                 fractureVolume += 0.5 * fracture_length * fracture_width;
             }
         }
-        w_F = fractureVolume/vol;
-        w_M = 1-w_F;
+        wf = fractureVolume/vol;
+        wm = 1-wf;
         ///////////////////////////////////////////////////////////////////////
         Scalar storageFracture[numPhases];
         Scalar storageMatrix [numPhases];
@@ -171,10 +171,10 @@ public:
         storageMatrix[nPhaseIdx]    = 0.0;
         //        const GlobalPosition &globalPos = elem.geometry().corner(scvIdx);
 
-        Scalar dSM_dSF = vertDat.dsm_dsf();
+        Scalar dsm_dsf = vertDat.dsm_dsf();
         if (!this->problem_().useInterfaceCondition())
         {
-            dSM_dSF = 1.0;
+            dsm_dsf = 1.0;
         }
 
         if (isFracture)
@@ -183,12 +183,12 @@ public:
             {
                 storageFracture[phaseIdx] = vertDat.density(phaseIdx)
                                         * vertDat.porosityFracture()
-                                        * w_F
+                                        * wf
                                         * vertDat.saturationFracture(phaseIdx);
                 storageMatrix[phaseIdx] = vertDat.density(phaseIdx)
                                         * vertDat.porosity()
-                                        * w_M
-                                        * dSM_dSF
+                                        * wm
+                                        * dsm_dsf
                                         * vertDat.saturationMatrix(phaseIdx);
             }
         }
diff --git a/dumux/implicit/2pdfm/2pdfmvolumevariables.hh b/dumux/implicit/2pdfm/2pdfmvolumevariables.hh
index 911313ea35625e1c99fe71a6e8419a0f3ecf68a6..8cb95273560bccbfdc3bdf9b5b26a575643d3eea 100644
--- a/dumux/implicit/2pdfm/2pdfmvolumevariables.hh
+++ b/dumux/implicit/2pdfm/2pdfmvolumevariables.hh
@@ -144,11 +144,11 @@ public:
         satN_ = satNMatrix_;
         satW_ = satWMatrix_;
 
-        pCMatrix_ = MaterialLaw::pc(materialParamsMatrix, satWMatrix_);
-        pC_ = pCMatrix_;
+        pcMatrix_ = MaterialLaw::pc(materialParamsMatrix, satWMatrix_);
+        pc_ = pcMatrix_;
         //pressures
         pMatrix[wPhaseIdx] = priVars[pressureIdx];
-        pMatrix[nPhaseIdx] = pMatrix[wPhaseIdx] + pCMatrix_;
+        pMatrix[nPhaseIdx] = pMatrix[wPhaseIdx] + pcMatrix_;
         //Initialize pFract with the same values as the ones in the matrix
         pFract[wPhaseIdx] = pMatrix[wPhaseIdx];
         pFract[nPhaseIdx] = satNMatrix_;
@@ -169,9 +169,9 @@ public:
 
             satNFracture_ = priVars[saturationIdx];
             satWFracture_ = 1 - satNFracture_;
-            pCFracture_ = MaterialLaw::pc(materialParamsFracture, satWFracture_);
+            pcFracture_ = MaterialLaw::pc(materialParamsFracture, satWFracture_);
             pFract[wPhaseIdx] = priVars[pressureIdx];
-            pFract[nPhaseIdx] = pFract[wPhaseIdx] + pCFracture_;
+            pFract[nPhaseIdx] = pFract[wPhaseIdx] + pcFracture_;
             pEntryMatrix_ = MaterialLaw::pc(materialParamsMatrix, 1);
 
             //use interface condition - extended capillary pressure inteface condition
@@ -179,7 +179,7 @@ public:
             {
                 interfaceCondition(materialParamsMatrix);
             }
-            pC_ = pCFracture_;
+            pc_ = pcFracture_;
             satW_ = satWFracture_; //for plotting we are interested in the saturations of the fracture
             satN_ = satNFracture_;
             mobilityFracture_[wPhaseIdx] =
@@ -191,10 +191,10 @@ public:
                         / fluidStateFracture_.viscosity(nPhaseIdx);
 
             // derivative resulted from BrooksCorey pc_Sw formulation
-            dSM_dSF_ = (1 - problem.spatialParams().SwrM_) / (1 - problem.spatialParams().SwrF_)
-                    * pow((problem.spatialParams().pdM_/ problem.spatialParams().pdF_),problem.spatialParams().lambdaM_)
+            dsm_dsf_ = (1 - problem.spatialParams().swrm_) / (1 - problem.spatialParams().swrf_)
+                    * pow((problem.spatialParams().pdm_/ problem.spatialParams().pdf_),problem.spatialParams().lambdaM_)
                     * (problem.spatialParams().lambdaM_ / problem.spatialParams().lambdaF_)
-                    * pow((satWFracture_ - problem.spatialParams().SwrF_ ) / (1 - problem.spatialParams().SwrF_),
+                    * pow((satWFracture_ - problem.spatialParams().swrf_ ) / (1 - problem.spatialParams().swrf_),
                             (problem.spatialParams().lambdaM_ / problem.spatialParams().lambdaF_) - 1);
         }// end if (node)
         ///////////////////////////////////////////////////////////////////////////////
@@ -204,7 +204,7 @@ public:
                 there are no fracture are set unphysical*/
             satNFracture_ = -1;
             satWFracture_ = -1;
-            pCFracture_ = -1e100;
+            pcFracture_ = -1e100;
             pFract[wPhaseIdx] = -1e100;
             pFract[nPhaseIdx] = -1e100;
             pEntryMatrix_ = -1e100;
@@ -213,7 +213,7 @@ public:
         }
         ///////////////////////////////////////////////////////////////////////////////
         pressure[wPhaseIdx] = priVars[pressureIdx];
-        pressure[nPhaseIdx] = pressure[wPhaseIdx] + pC_;
+        pressure[nPhaseIdx] = pressure[wPhaseIdx] + pc_;
 
         porosityFracture_ = problem.spatialParams().porosityFracture(element,
                                                                   fvGeometry,
@@ -223,7 +223,7 @@ public:
     /*!
      * \brief Extended capillary pressure saturation interface condition
      *
-     * \param materialParamsMatrix the material law o calculate the Sw as inverse of capillary pressure function
+     * \param materialParamsMatrix the material law o calculate the sw as inverse of capillary pressure function
      *
      * This method is called by updateFracture
      */
@@ -233,7 +233,7 @@ public:
         * if the capillary pressure in the fracture is smaller than the entry pressure
         * in the matrix than in the matrix
         * */
-        if (pCFracture_ <= pEntryMatrix_)
+        if (pcFracture_ <= pEntryMatrix_)
         {
             satWMatrix_ = 1.0;
             satNMatrix_ = 1 - satWMatrix_;
@@ -244,7 +244,7 @@ public:
             /*
              * Inverse capillary pressure function SwM = pcM^(-1)(pcF(SwF))
              */
-            satWMatrix_ = MaterialLaw::sw(materialParamsMatrix, pCFracture_);
+            satWMatrix_ = MaterialLaw::sw(materialParamsMatrix, pcFracture_);
             satNMatrix_ = 1 - satWMatrix_;
         }
     }
@@ -347,7 +347,7 @@ public:
      * \brief Returns the derivative dsm/dsf
      */
     Scalar dsm_dsf() const
-    { return dSM_dSF_;}
+    { return dsm_dsf_;}
 
     DUNE_DEPRECATED_MSG("use dsm_dsf() (uncapitalized) instead")
     Scalar dSM_dSF() const
@@ -372,11 +372,11 @@ protected:
     Scalar satNFracture_;
     Scalar satNMatrix_;
 
-    Scalar pC_;
-    Scalar pCFracture_;
-    Scalar pCMatrix_;
+    Scalar pc_;
+    Scalar pcFracture_;
+    Scalar pcMatrix_;
     Scalar pEntryMatrix_;
-    Scalar dSM_dSF_;
+    Scalar dsm_dsf_;
 
     bool isNodeOnFracture_;
 
diff --git a/dumux/implicit/3p3c/3p3cmodel.hh b/dumux/implicit/3p3c/3p3cmodel.hh
index b171e3283cf7e64aca7f9228a84f0f850098169d..a0df51ee81ae8d49d2582dd368b3b5f64281e919 100644
--- a/dumux/implicit/3p3c/3p3cmodel.hh
+++ b/dumux/implicit/3p3c/3p3cmodel.hh
@@ -379,9 +379,9 @@ public:
 
         }
 
-        writer.attachDofData(*saturation[wPhaseIdx], "Sw", isBox);
-        writer.attachDofData(*saturation[nPhaseIdx], "Sn", isBox);
-        writer.attachDofData(*saturation[gPhaseIdx], "Sg", isBox);
+        writer.attachDofData(*saturation[wPhaseIdx], "sw", isBox);
+        writer.attachDofData(*saturation[nPhaseIdx], "sn", isBox);
+        writer.attachDofData(*saturation[gPhaseIdx], "sg", isBox);
         writer.attachDofData(*pressure[wPhaseIdx], "pw", isBox);
         writer.attachDofData(*pressure[nPhaseIdx], "pn", isBox);
         writer.attachDofData(*pressure[gPhaseIdx], "pg", isBox);
@@ -590,7 +590,7 @@ protected:
                 wouldSwitch = true;
                 // gas phase disappears
                 std::cout << "Gas phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sg: "
+                          << ", coordinates: " << globalPos << ", sg: "
                           << volVars.saturation(gPhaseIdx) << std::endl;
                 newPhasePresence = wnPhaseOnly;
 
@@ -602,7 +602,7 @@ protected:
                 wouldSwitch = true;
                 // water phase disappears
                 std::cout << "Water phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sw: "
+                          << ", coordinates: " << globalPos << ", sw: "
                           << volVars.saturation(wPhaseIdx) << std::endl;
                 newPhasePresence = gnPhaseOnly;
 
@@ -614,7 +614,7 @@ protected:
                 wouldSwitch = true;
                 // NAPL phase disappears
                 std::cout << "NAPL phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sn: "
+                          << ", coordinates: " << globalPos << ", sn: "
                           << volVars.saturation(nPhaseIdx) << std::endl;
                 newPhasePresence = wgPhaseOnly;
 
@@ -714,7 +714,7 @@ protected:
                 wouldSwitch = true;
                 // NAPL phase disappears
                 std::cout << "NAPL phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sn: "
+                          << ", coordinates: " << globalPos << ", sn: "
                           << volVars.saturation(nPhaseIdx) << std::endl;
                 nonwettingFlag = 1;
             }
@@ -779,7 +779,7 @@ protected:
                 wouldSwitch = true;
                 // NAPL phase disappears
                 std::cout << "NAPL phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sn: "
+                          << ", coordinates: " << globalPos << ", sn: "
                           << volVars.saturation(nPhaseIdx) << std::endl;
                 nonwettingFlag = 1;
             }
@@ -942,7 +942,7 @@ protected:
                 wouldSwitch = true;
                 // gas phase disappears
                 std::cout << "Gas phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sg: "
+                          << ", coordinates: " << globalPos << ", sg: "
                           << volVars.saturation(gPhaseIdx) << std::endl;
                 gasFlag = 1;
             }
@@ -956,7 +956,7 @@ protected:
                 wouldSwitch = true;
                 // gas phase disappears
                 std::cout << "Water phase disappears at vertex " << globalIdx
-                          << ", coordinates: " << globalPos << ", Sw: "
+                          << ", coordinates: " << globalPos << ", sw: "
                           << volVars.saturation(wPhaseIdx) << std::endl;
                 wettingFlag = 1;
             }
diff --git a/dumux/implicit/3p3c/3p3cvolumevariables.hh b/dumux/implicit/3p3c/3p3cvolumevariables.hh
index baefaeecb874e9a7713edb1ae2bc4afe027bf386..d6361025008a05fdc6ea2166b39d5c2974de1e47 100644
--- a/dumux/implicit/3p3c/3p3cvolumevariables.hh
+++ b/dumux/implicit/3p3c/3p3cvolumevariables.hh
@@ -141,56 +141,56 @@ public:
         /* first the saturations */
         if (phasePresence == threePhases)
         {
-            Sw_ = priVars[switch1Idx];
-            Sn_ = priVars[switch2Idx];
-            Sg_ = 1. - Sw_ - Sn_;
+            sw_ = priVars[switch1Idx];
+            sn_ = priVars[switch2Idx];
+            sg_ = 1. - sw_ - sn_;
         }
         else if (phasePresence == wPhaseOnly)
         {
-            Sw_ = 1.;
-            Sn_ = 0.;
-            Sg_ = 0.;
+            sw_ = 1.;
+            sn_ = 0.;
+            sg_ = 0.;
         }
         else if (phasePresence == gnPhaseOnly)
         {
-            Sw_ = 0.;
-            Sn_ = priVars[switch2Idx];
-            Sg_ = 1. - Sn_;
+            sw_ = 0.;
+            sn_ = priVars[switch2Idx];
+            sg_ = 1. - sn_;
         }
         else if (phasePresence == wnPhaseOnly)
         {
-            Sn_ = priVars[switch2Idx];
-            Sw_ = 1. - Sn_;
-            Sg_ = 0.;
+            sn_ = priVars[switch2Idx];
+            sw_ = 1. - sn_;
+            sg_ = 0.;
         }
         else if (phasePresence == gPhaseOnly)
         {
-            Sw_ = 0.;
-            Sn_ = 0.;
-            Sg_ = 1.;
+            sw_ = 0.;
+            sn_ = 0.;
+            sg_ = 1.;
         }
         else if (phasePresence == wgPhaseOnly)
         {
-            Sw_ = priVars[switch1Idx];
-            Sn_ = 0.;
-            Sg_ = 1. - Sw_;
+            sw_ = priVars[switch1Idx];
+            sn_ = 0.;
+            sg_ = 1. - sw_;
         }
         else DUNE_THROW(Dune::InvalidStateException, "phasePresence: " << phasePresence << " is invalid.");
-        Valgrind::CheckDefined(Sg_);
+        Valgrind::CheckDefined(sg_);
 
-        fluidState_.setSaturation(wPhaseIdx, Sw_);
-        fluidState_.setSaturation(gPhaseIdx, Sg_);
-        fluidState_.setSaturation(nPhaseIdx, Sn_);
+        fluidState_.setSaturation(wPhaseIdx, sw_);
+        fluidState_.setSaturation(gPhaseIdx, sg_);
+        fluidState_.setSaturation(nPhaseIdx, sn_);
 
         /* now the pressures */
         pg_ = priVars[pressureIdx];
 
         // calculate capillary pressures
-        Scalar pcgw = MaterialLaw::pcgw(materialParams, Sw_);
-        Scalar pcnw = MaterialLaw::pcnw(materialParams, Sw_);
-        Scalar pcgn = MaterialLaw::pcgn(materialParams, Sw_ + Sn_);
+        Scalar pcgw = MaterialLaw::pcgw(materialParams, sw_);
+        Scalar pcnw = MaterialLaw::pcnw(materialParams, sw_);
+        Scalar pcgn = MaterialLaw::pcgn(materialParams, sw_ + sn_);
 
-        Scalar pcAlpha = MaterialLaw::pcAlpha(materialParams, Sn_);
+        Scalar pcAlpha = MaterialLaw::pcAlpha(materialParams, sn_);
         Scalar pcNW1 = 0.0; // TODO: this should be possible to assign in the problem file
 
         pn_ = pg_- pcAlpha * pcgn - (1.-pcAlpha)*(pcgw - pcNW1);
@@ -706,7 +706,7 @@ protected:
                        bool isOldSol)
     { }
 
-    Scalar Sw_, Sg_, Sn_, pg_, pw_, pn_;
+    Scalar sw_, sg_, sn_, pg_, pw_, pn_;
 
     Scalar moleFrac_[numPhases][numComponents];
     Scalar massFrac_[numPhases][numComponents];
diff --git a/dumux/implicit/co2/co2model.hh b/dumux/implicit/co2/co2model.hh
index c7b16e47fdf6568b7cee56de77bd595666f3b5ed..9000673e36b034da1b2d4385dd440784bf6f428a 100644
--- a/dumux/implicit/co2/co2model.hh
+++ b/dumux/implicit/co2/co2model.hh
@@ -241,7 +241,7 @@ public:
                    wouldSwitch = true;
                    // nonwetting phase disappears
                    std::cout << "Nonwetting phase disappears at vertex " << globalIdx
-                             << ", coordinates: " << globalPos << ", Sn: "
+                             << ", coordinates: " << globalPos << ", sn: "
                              << volVars.saturation(nPhaseIdx) << std::endl;
                    newPhasePresence = wPhaseOnly;
 
@@ -253,7 +253,7 @@ public:
                    wouldSwitch = true;
                    // wetting phase disappears
                    std::cout << "Wetting phase disappears at vertex " << globalIdx
-                             << ", coordinates: " << globalPos << ", Sw: "
+                             << ", coordinates: " << globalPos << ", sw: "
                              << volVars.saturation(wPhaseIdx) << std::endl;
                    newPhasePresence = nPhaseOnly;
 
diff --git a/dumux/implicit/co2/co2volumevariables.hh b/dumux/implicit/co2/co2volumevariables.hh
index 21f2e1cb8b8a566915423570ce18f4d3182e426b..6fc918cd4446a0454f2f9571409b68afad801c2c 100644
--- a/dumux/implicit/co2/co2volumevariables.hh
+++ b/dumux/implicit/co2/co2volumevariables.hh
@@ -137,37 +137,37 @@ public:
          /////////////
          // set the saturations
          /////////////
-         Scalar Sn;
+         Scalar sn;
          if (phasePresence == nPhaseOnly)
-             Sn = 1.0;
+             sn = 1.0;
          else if (phasePresence == wPhaseOnly) {
-             Sn = 0.0;
+             sn = 0.0;
          }
          else if (phasePresence == bothPhases) {
              if (formulation == pwsn)
-                 Sn = priVars[switchIdx];
+                 sn = priVars[switchIdx];
              else if (formulation == pnsw)
-                 Sn = 1.0 - priVars[switchIdx];
+                 sn = 1.0 - priVars[switchIdx];
              else DUNE_THROW(Dune::InvalidStateException, "Formulation: " << formulation << " is invalid.");
          }
          else DUNE_THROW(Dune::InvalidStateException, "phasePresence: " << phasePresence << " is invalid.");
-         ParentType::fluidState_.setSaturation(wPhaseIdx, 1 - Sn);
-         ParentType::fluidState_.setSaturation(nPhaseIdx, Sn);
+         ParentType::fluidState_.setSaturation(wPhaseIdx, 1 - sn);
+         ParentType::fluidState_.setSaturation(nPhaseIdx, sn);
 
          // capillary pressure parameters
           const MaterialLawParams &materialParams =
               problem.spatialParams().materialLawParams(element, fvGeometry, scvIdx);
 
 
-          Scalar pC = MaterialLaw::pc(materialParams, 1 - Sn);
+          Scalar pc = MaterialLaw::pc(materialParams, 1 - sn);
 
           if (formulation == pwsn) {
               ParentType::fluidState_.setPressure(wPhaseIdx, priVars[pressureIdx]);
-              ParentType::fluidState_.setPressure(nPhaseIdx, priVars[pressureIdx] + pC);
+              ParentType::fluidState_.setPressure(nPhaseIdx, priVars[pressureIdx] + pc);
           }
           else if (formulation == pnsw) {
               ParentType::fluidState_.setPressure(nPhaseIdx, priVars[pressureIdx]);
-              ParentType::fluidState_.setPressure(wPhaseIdx, priVars[pressureIdx] - pC);
+              ParentType::fluidState_.setPressure(wPhaseIdx, priVars[pressureIdx] - pc);
           }
           else DUNE_THROW(Dune::InvalidStateException, "Formulation: " << formulation << " is invalid.");
 
@@ -338,8 +338,8 @@ public:
 //          {
 //              std::cout<<"globalIdx = "<<globalIdx<<std::endl;
 //              std::cout<<"scvIdx = "<<globalIdx<<std::endl;
-//              std::cout<<"Sn = "<<ParentType::fluidState_.saturation(nPhaseIdx)<<std::endl;
-//              std::cout<<"Sw = "<<ParentType::fluidState_.saturation(wPhaseIdx)<<std::endl;
+//              std::cout<<"sn = "<<ParentType::fluidState_.saturation(nPhaseIdx)<<std::endl;
+//              std::cout<<"sw = "<<ParentType::fluidState_.saturation(wPhaseIdx)<<std::endl;
 //              std::cout<<"mobilityN = "<<ParentType::mobility(nPhaseIdx)<<std::endl;
 //              std::cout<<"xgH2O = "<<ParentType::fluidState_.moleFraction(nPhaseIdx, wCompIdx)<<std::endl;
 //              std::cout<<"xgCO2 = "<<ParentType::fluidState_.moleFraction(nPhaseIdx, nCompIdx)<<std::endl;
diff --git a/dumux/implicit/mpnc/energy/mpncfluxvariablesenergy.hh b/dumux/implicit/mpnc/energy/mpncfluxvariablesenergy.hh
index e567e3ccea23dcbbea3cb8e2ba99e9754a081703..ce50f9ebea3d3f792b1226ac0318d3327a6e784e 100644
--- a/dumux/implicit/mpnc/energy/mpncfluxvariablesenergy.hh
+++ b/dumux/implicit/mpnc/energy/mpncfluxvariablesenergy.hh
@@ -146,14 +146,14 @@ public:
 
          const FluidState &fsI = elemVolVars[i].fluidState();
          const FluidState &fsJ = elemVolVars[j].fluidState();
-         const Scalar Swi = fsI.saturation(wPhaseIdx);
-         const Scalar Swj = fsJ.saturation(wPhaseIdx);
+         const Scalar swi = fsI.saturation(wPhaseIdx);
+         const Scalar swj = fsJ.saturation(wPhaseIdx);
 
          typename FluidSystem::ParameterCache paramCacheI, paramCacheJ;
          paramCacheI.updateAll(fsI);
          paramCacheJ.updateAll(fsJ);
 
-         const Scalar Sw = std::max<Scalar>(0.0, 0.5*(Swi + Swj));
+         const Scalar sw = std::max<Scalar>(0.0, 0.5*(swi + swj));
 
          //        const Scalar lambdaDry = 0.583; // W / (K m) // works, orig
          //        const Scalar lambdaWet = 1.13; // W / (K m) // works, orig
@@ -172,15 +172,15 @@ public:
          // Stuttgart, Institute of Hydraulic Engineering, p. 57
 
          Scalar result;
-         if (Sw < 0.1) {
+         if (sw < 0.1) {
              // regularization
              Dumux::Spline<Scalar> sp(0, 0.1, // x1, x2
                                       0, sqrt(0.1), // y1, y2
                                       5*0.5/sqrt(0.1), 0.5/sqrt(0.1)); // m1, m2
-             result = lambdaDry + sp.eval(Sw)*(lambdaWet - lambdaDry);
+             result = lambdaDry + sp.eval(sw)*(lambdaWet - lambdaDry);
          }
          else
-             result = lambdaDry + std::sqrt(Sw)*(lambdaWet - lambdaDry);
+             result = lambdaDry + std::sqrt(sw)*(lambdaWet - lambdaDry);
 
          return result;
     }
diff --git a/dumux/implicit/richards/richardsmodel.hh b/dumux/implicit/richards/richardsmodel.hh
index bc75f3279cb13965a2b5f8044348c22fefef1abe..5b53e5f0b7d76c6a61cb08990cc24f2d99993f54 100644
--- a/dumux/implicit/richards/richardsmodel.hh
+++ b/dumux/implicit/richards/richardsmodel.hh
@@ -143,11 +143,11 @@ public:
         unsigned numDofs = this->numDofs();
 
         // create the required scalar fields
-        ScalarField *pW = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pN = writer.allocateManagedBuffer(numDofs);
-        ScalarField *pC = writer.allocateManagedBuffer(numDofs);
-        ScalarField *Sw = writer.allocateManagedBuffer(numDofs);
-        ScalarField *Sn = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pw = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pn = writer.allocateManagedBuffer(numDofs);
+        ScalarField *pc = writer.allocateManagedBuffer(numDofs);
+        ScalarField *sw = writer.allocateManagedBuffer(numDofs);
+        ScalarField *sn = writer.allocateManagedBuffer(numDofs);
         ScalarField *rhoW = writer.allocateManagedBuffer(numDofs);
         ScalarField *rhoN = writer.allocateManagedBuffer(numDofs);
         ScalarField *mobW = writer.allocateManagedBuffer(numDofs);
@@ -189,11 +189,11 @@ public:
             {
                 int globalIdx = this->dofMapper().map(*elemIt, scvIdx, dofCodim);
 
-                (*pW)[globalIdx] = elemVolVars[scvIdx].pressure(wPhaseIdx);
-                (*pN)[globalIdx] = elemVolVars[scvIdx].pressure(nPhaseIdx);
-                (*pC)[globalIdx] = elemVolVars[scvIdx].capillaryPressure();
-                (*Sw)[globalIdx] = elemVolVars[scvIdx].saturation(wPhaseIdx);
-                (*Sn)[globalIdx] = elemVolVars[scvIdx].saturation(nPhaseIdx);
+                (*pw)[globalIdx] = elemVolVars[scvIdx].pressure(wPhaseIdx);
+                (*pn)[globalIdx] = elemVolVars[scvIdx].pressure(nPhaseIdx);
+                (*pc)[globalIdx] = elemVolVars[scvIdx].capillaryPressure();
+                (*sw)[globalIdx] = elemVolVars[scvIdx].saturation(wPhaseIdx);
+                (*sn)[globalIdx] = elemVolVars[scvIdx].saturation(nPhaseIdx);
                 (*rhoW)[globalIdx] = elemVolVars[scvIdx].density(wPhaseIdx);
                 (*rhoN)[globalIdx] = elemVolVars[scvIdx].density(nPhaseIdx);
                 (*mobW)[globalIdx] = elemVolVars[scvIdx].mobility(wPhaseIdx);
@@ -206,11 +206,11 @@ public:
             velocityOutput.calculateVelocity(*velocity, elemVolVars, fvGeometry, *elemIt, /*phaseIdx=*/0);
         }
 
-        writer.attachDofData(*Sn, "Sn", isBox);
-        writer.attachDofData(*Sw, "Sw", isBox);
-        writer.attachDofData(*pN, "pn", isBox);
-        writer.attachDofData(*pW, "pw", isBox);
-        writer.attachDofData(*pC, "pc", isBox);
+        writer.attachDofData(*sn, "sn", isBox);
+        writer.attachDofData(*sw, "sw", isBox);
+        writer.attachDofData(*pn, "pn", isBox);
+        writer.attachDofData(*pw, "pw", isBox);
+        writer.attachDofData(*pc, "pc", isBox);
         writer.attachDofData(*rhoW, "rhoW", isBox);
         writer.attachDofData(*rhoN, "rhoN", isBox);
         writer.attachDofData(*mobW, "mobW", isBox);
diff --git a/dumux/implicit/richards/richardsnewtoncontroller.hh b/dumux/implicit/richards/richardsnewtoncontroller.hh
index a5e7ac9a4a89f6ecda2c4bc30d9c4c9c797a4e1f..cf36745b3f44e21328b05e15960ddc69a1096c9e 100644
--- a/dumux/implicit/richards/richardsnewtoncontroller.hh
+++ b/dumux/implicit/richards/richardsnewtoncontroller.hh
@@ -103,21 +103,21 @@ public:
                     const SpatialParams &spatialParams = this->problem_().spatialParams();
                     const MaterialLawParams &mp = spatialParams.materialLawParams(*elemIt, fvGeometry, scvIdx);
                     Scalar pcMin = MaterialLaw::pc(mp, 1.0);
-                    Scalar pW = uLastIter[globalIdx][pwIdx];
-                    Scalar pN = std::max(this->problem_().referencePressure(*elemIt, fvGeometry, scvIdx),
-                                         pW + pcMin);
-                    Scalar pcOld = pN - pW;
+                    Scalar pw = uLastIter[globalIdx][pwIdx];
+                    Scalar pn = std::max(this->problem_().referencePressure(*elemIt, fvGeometry, scvIdx),
+                                         pw + pcMin);
+                    Scalar pcOld = pn - pw;
                     Scalar SwOld = std::max<Scalar>(0.0, MaterialLaw::sw(mp, pcOld));
 
                     // convert into minimum and maximum wetting phase
                     // pressures
-                    Scalar pwMin = pN - MaterialLaw::pc(mp, SwOld - 0.2);
-                    Scalar pwMax = pN - MaterialLaw::pc(mp, SwOld + 0.2);
+                    Scalar pwMin = pn - MaterialLaw::pc(mp, SwOld - 0.2);
+                    Scalar pwMax = pn - MaterialLaw::pc(mp, SwOld + 0.2);
 
                     // clamp the result
-                    pW = uCurrentIter[globalIdx][pwIdx];
-                    pW = std::max(pwMin, std::min(pW, pwMax));
-                    uCurrentIter[globalIdx][pwIdx] = pW;
+                    pw = uCurrentIter[globalIdx][pwIdx];
+                    pw = std::max(pwMin, std::min(pw, pwMax));
+                    uCurrentIter[globalIdx][pwIdx] = pw;
 
                 }
             }
diff --git a/dumux/implicit/richards/richardsvolumevariables.hh b/dumux/implicit/richards/richardsvolumevariables.hh
index 2050d372451df77f6553f7ee8e4e896a502fac20..0e24a53f45cebcefebd4bff587b580594c3fb428 100644
--- a/dumux/implicit/richards/richardsvolumevariables.hh
+++ b/dumux/implicit/richards/richardsvolumevariables.hh
@@ -128,9 +128,9 @@ public:
         fluidState.setPressure(nPhaseIdx, std::max(pnRef, priVars[pwIdx] + minPc));
 
         // saturations
-        Scalar Sw = MaterialLaw::sw(matParams, fluidState.pressure(nPhaseIdx) - fluidState.pressure(wPhaseIdx));
-        fluidState.setSaturation(wPhaseIdx, Sw);
-        fluidState.setSaturation(nPhaseIdx, 1 - Sw);
+        Scalar sw = MaterialLaw::sw(matParams, fluidState.pressure(nPhaseIdx) - fluidState.pressure(wPhaseIdx));
+        fluidState.setSaturation(wPhaseIdx, sw);
+        fluidState.setSaturation(nPhaseIdx, 1 - sw);
 
         // density and viscosity
         typename FluidSystem::ParameterCache paramCache;
diff --git a/test/implicit/2p/lensspatialparams.hh b/test/implicit/2p/lensspatialparams.hh
index a9a2fd9dce771d5cd5315d860e0b3c70a25bc375..f1032f3131e94da589fc965befaa9ca54cbb0a0e 100644
--- a/test/implicit/2p/lensspatialparams.hh
+++ b/test/implicit/2p/lensspatialparams.hh
@@ -166,7 +166,7 @@ public:
     { return 0.4; }
 
     /*!
-     * \brief Function for defining the parameters needed by constitutive relationships (kr-Sw, pc-Sw, etc.).
+     * \brief Function for defining the parameters needed by constitutive relationships (kr-sw, pc-sw, etc.).
      *
      * \param element The current element
      * \param fvElemGeom The current finite volume geometry of the element
diff --git a/test/implicit/2pdfm/2pdfmspatialparams.hh b/test/implicit/2pdfm/2pdfmspatialparams.hh
index eb2bcaba7387507c9dc3bd15e62f44e5599ae559..c4456a63b83adb51fa9d97d106056260018d34fd 100644
--- a/test/implicit/2pdfm/2pdfmspatialparams.hh
+++ b/test/implicit/2pdfm/2pdfmspatialparams.hh
@@ -109,23 +109,23 @@ public:
 
         Scalar mD = 1e-12 * 1e-3; //miliDarcy
 
-        SwrF_    = 0.00;
-        SwrM_    = 0.00;
+        swrf_    = 0.00;
+        swrm_    = 0.00;
         SnrF_    = 0.00;
         SnrM_    = 0.00;
-        pdF_     = 1000; //2.5*1e4;
-        pdM_     = 2000; //2.5*1e4;
+        pdf_     = 1000; //2.5*1e4;
+        pdm_     = 2000; //2.5*1e4;
         lambdaF_ = 2.0;
         lambdaM_ = 2.0;
 
-        rockMatrixMaterialParams_.setSwr(SwrM_);
+        rockMatrixMaterialParams_.setSwr(swrm_);
         rockMatrixMaterialParams_.setSnr(SnrM_);
-        fractureMaterialParams_.setSwr(SwrF_);
+        fractureMaterialParams_.setSwr(swrf_);
         fractureMaterialParams_.setSnr(SnrF_);
 
-        rockMatrixMaterialParams_.setPe(pdM_);
+        rockMatrixMaterialParams_.setPe(pdm_);
         rockMatrixMaterialParams_.setLambda(lambdaM_);
-        fractureMaterialParams_.setPe(pdF_);
+        fractureMaterialParams_.setPe(pdf_);
         fractureMaterialParams_.setLambda(lambdaF_);
 
         KMatrix_   = 1 * mD; //m^2
@@ -194,7 +194,7 @@ public:
         return porosityFracture_;
     }
     /*!
-     * \brief Function for defining the parameters needed by constitutive relationships (kr-Sw, pc-Sw, etc.).
+     * \brief Function for defining the parameters needed by constitutive relationships (kr-sw, pc-sw, etc.).
      *
      * \param element The current element
      * \param fvGeometry The current finite volume geometry of the element
@@ -209,7 +209,7 @@ public:
     }
 
     /*!
-     * \brief Function for defining the parameters needed by constitutive relationships (kr-Sw, pc-Sw, etc.).
+     * \brief Function for defining the parameters needed by constitutive relationships (kr-sw, pc-sw, etc.).
      *
      * \param element The current element
      * \param fvGeometry The current finite volume geometry of the element
@@ -291,14 +291,14 @@ public:
         return fractureWidth_;
     }
 
-    Scalar SwrF_;
-    Scalar SwrM_;
+    Scalar swrf_;
+    Scalar swrm_;
     Scalar SnrF_;
     Scalar SnrM_;
     Scalar lambdaF_;
     Scalar lambdaM_;
-    Scalar pdF_;
-    Scalar pdM_;
+    Scalar pdf_;
+    Scalar pdm_;
 
 private:
     Scalar KMatrix_;
diff --git a/test/implicit/3p3c/infiltrationproblem.hh b/test/implicit/3p3c/infiltrationproblem.hh
index a0c90be7236b1d87d91cf96400ef0b22f844c409..599b130cb085d44e8d3bd383752dd2d7d67d0156 100644
--- a/test/implicit/3p3c/infiltrationproblem.hh
+++ b/test/implicit/3p3c/infiltrationproblem.hh
@@ -240,24 +240,24 @@ public:
     {
         Scalar y = globalPos[1];
         Scalar x = globalPos[0];
-        Scalar Sw, Swr=0.12, Sgr=0.03;
+        Scalar sw, swr=0.12, sgr=0.03;
 
         if(y >(-1.E-3*x+5) )
         {
             Scalar pc = 9.81 * 1000.0 * (y - (-5E-4*x+5));
             if (pc < 0.0) pc = 0.0;
 
-            Sw = invertPCGW_(pc,
+            sw = invertPcgw_(pc,
                              this->spatialParams().materialLawParams());
-            if (Sw < Swr) Sw = Swr;
-            if (Sw > 1.-Sgr) Sw = 1.-Sgr;
+            if (sw < swr) sw = swr;
+            if (sw > 1.-sgr) sw = 1.-sgr;
 
             values[pressureIdx] = 1e5 ;
-            values[switch1Idx] = Sw;
+            values[switch1Idx] = sw;
             values[switch2Idx] = 1.e-6;
         }else {
             values[pressureIdx] = 1e5 + 9.81 * 1000.0 * ((-5E-4*x+5) - y);
-            values[switch1Idx] = 1.-Sgr;
+            values[switch1Idx] = 1.-sgr;
             values[switch2Idx] = 1.e-6;
         }
 
@@ -348,53 +348,53 @@ private:
     {
         Scalar y = globalPos[1];
         Scalar x = globalPos[0];
-        Scalar Sw, Swr=0.12, Sgr=0.03;
+        Scalar sw, swr=0.12, sgr=0.03;
 
         if(y >(-1.E-3*x+5) )
         {
             Scalar pc = 9.81 * 1000.0 * (y - (-5E-4*x+5));
             if (pc < 0.0) pc = 0.0;
 
-            Sw = invertPCGW_(pc,
+            sw = invertPcgw_(pc,
                              this->spatialParams().materialLawParams());
-            if (Sw < Swr) Sw = Swr;
-            if (Sw > 1.-Sgr) Sw = 1.-Sgr;
+            if (sw < swr) sw = swr;
+            if (sw > 1.-sgr) sw = 1.-sgr;
 
             values[pressureIdx] = 1e5 ;
-            values[switch1Idx] = Sw;
+            values[switch1Idx] = sw;
             values[switch2Idx] = 1.e-6;
         }else {
             values[pressureIdx] = 1e5 + 9.81 * 1000.0 * ((-5E-4*x+5) - y);
-            values[switch1Idx] = 1.-Sgr;
+            values[switch1Idx] = 1.-sgr;
             values[switch2Idx] = 1.e-6;
         }
     }
 
-    static Scalar invertPCGW_(Scalar pcIn, const MaterialLawParams &pcParams)
+    static Scalar invertPcgw_(Scalar pcIn, const MaterialLawParams &pcParams)
     {
         Scalar lower,upper;
         int k;
         int maxIt = 50;
         Scalar bisLimit = 1.;
-        Scalar Sw, pcGW;
+        Scalar sw, pcgw;
         lower=0.0; upper=1.0;
         for (k=1; k<=25; k++)
         {
-            Sw = 0.5*(upper+lower);
-            pcGW = MaterialLaw::pcgw(pcParams, Sw);
-            Scalar delta = pcGW-pcIn;
+            sw = 0.5*(upper+lower);
+            pcgw = MaterialLaw::pcgw(pcParams, sw);
+            Scalar delta = pcgw-pcIn;
             if (delta<0.) delta*=-1.;
             if (delta<bisLimit)
             {
-                return(Sw);
+                return(sw);
             }
             if (k==maxIt) {
-                return(Sw);
+                return(sw);
             }
-            if (pcGW>pcIn) lower=Sw;
-            else upper=Sw;
+            if (pcgw>pcIn) lower=sw;
+            else upper=sw;
         }
-        return(Sw);
+        return(sw);
     }
 
     Scalar temperature_;
diff --git a/test/implicit/3p3c/infiltrationspatialparameters.hh b/test/implicit/3p3c/infiltrationspatialparameters.hh
index b2755ef671e0f6984d847858d3b1850ef303c8e3..82e45992fded59fc2c3946bc23d44e4848606f1b 100644
--- a/test/implicit/3p3c/infiltrationspatialparameters.hh
+++ b/test/implicit/3p3c/infiltrationspatialparameters.hh
@@ -244,21 +244,21 @@ public:
                         const FVElementGeometry &fvGeometry,
                         int scvfIdx) const
     {
-        static const Scalar ldry = 0.35;
-        static const Scalar lSw1 = 1.8;
-        static const Scalar lSn1 = 0.65;
+        static const Scalar lDry = 0.35;
+        static const Scalar lsw1 = 1.8;
+        static const Scalar lsn1 = 0.65;
 
         // arithmetic mean of the liquid saturation and the porosity
         const int i = fluxDat.face().i;
         const int j = fluxDat.face().j;
-        Scalar Sw = std::max(0.0, (elemVolVars[i].saturation(wPhaseIdx) +
+        Scalar sw = std::max(0.0, (elemVolVars[i].saturation(wPhaseIdx) +
                                    elemVolVars[j].saturation(wPhaseIdx)) / 2);
-        Scalar Sn = std::max(0.0, (elemVolVars[i].saturation(nPhaseIdx) +
+        Scalar sn = std::max(0.0, (elemVolVars[i].saturation(nPhaseIdx) +
                                    elemVolVars[j].saturation(nPhaseIdx)) / 2);
 
         // the heat conductivity of the matrix. in general this is a
         // tensorial value, but we assume isotropic heat conductivity.
-        Scalar heatCond = ldry + sqrt(Sw) * (lSw1-ldry) + sqrt(Sn) * (lSn1-ldry);
+        Scalar heatCond = lDry + sqrt(sw) * (lsw1-lDry) + sqrt(sn) * (lsn1-lDry);
 
         // the matrix heat flux is the negative temperature gradient
         // times the heat conductivity.
diff --git a/test/implicit/3p3cni/columnxylolspatialparams.hh b/test/implicit/3p3cni/columnxylolspatialparams.hh
index 64426ae74f37fc61cb9a9440a280186375123d7f..6a10a0ace13bd58ee2b757a696bc4d27b2baad7d 100644
--- a/test/implicit/3p3cni/columnxylolspatialparams.hh
+++ b/test/implicit/3p3cni/columnxylolspatialparams.hh
@@ -258,21 +258,21 @@ public:
                         const FVElementGeometry &fvGeometry,
                         int faceIdx) const
     {
-        static const Scalar ldry = 0.35;
-        static const Scalar lSw1 = 1.8;
-        static const Scalar lSn1 = 0.65;
+        static const Scalar lDry = 0.35;
+        static const Scalar lsw1 = 1.8;
+        static const Scalar lsn1 = 0.65;
 
         // arithmetic mean of the liquid saturation and the porosity
         const int i = fluxDat.face().i;
         const int j = fluxDat.face().j;
-        Scalar Sw = std::max(0.0, (elemVolVars[i].saturation(wPhaseIdx) +
+        Scalar sw = std::max(0.0, (elemVolVars[i].saturation(wPhaseIdx) +
                                    elemVolVars[j].saturation(wPhaseIdx)) / 2);
-        Scalar Sn = std::max(0.0, (elemVolVars[i].saturation(nPhaseIdx) +
+        Scalar sn = std::max(0.0, (elemVolVars[i].saturation(nPhaseIdx) +
                                    elemVolVars[j].saturation(nPhaseIdx)) / 2);
 
         // the heat conductivity of the matrix. in general this is a
         // tensorial value, but we assume isotropic heat conductivity.
-        Scalar heatCond = ldry + sqrt(Sw) * (lSw1-ldry) + sqrt(Sn) * (lSn1-ldry);
+        Scalar heatCond = lDry + sqrt(sw) * (lsw1-lDry) + sqrt(sn) * (lsn1-lDry);
 
         // the matrix heat flux is the negative temperature gradient
         // times the heat conductivity.
diff --git a/test/implicit/3p3cni/kuevettespatialparams.hh b/test/implicit/3p3cni/kuevettespatialparams.hh
index a13932b4dbddc4efc296b25de8a3cf2a3c400255..824e979af7b335ee910acaa6fab182248cb79a20 100644
--- a/test/implicit/3p3cni/kuevettespatialparams.hh
+++ b/test/implicit/3p3cni/kuevettespatialparams.hh
@@ -253,21 +253,21 @@ public:
                         const FVElementGeometry &fvGeometry,
                         const int faceIdx) const
     {
-        static const Scalar ldry = 0.35;
-        static const Scalar lSw1 = 1.8;
-        static const Scalar lSn1 = 0.65;
+        static const Scalar lDry = 0.35;
+        static const Scalar lsw1 = 1.8;
+        static const Scalar lsn1 = 0.65;
 
         // arithmetic mean of the liquid saturation and the porosity
         const int i = fluxDat.face().i;
         const int j = fluxDat.face().j;
-        Scalar Sw = std::max(0.0, (elemVolVars[i].saturation(wPhaseIdx) +
+        Scalar sw = std::max(0.0, (elemVolVars[i].saturation(wPhaseIdx) +
                                    elemVolVars[j].saturation(wPhaseIdx)) / 2);
-        Scalar Sn = std::max(0.0, (elemVolVars[i].saturation(nPhaseIdx) +
+        Scalar sn = std::max(0.0, (elemVolVars[i].saturation(nPhaseIdx) +
                                    elemVolVars[j].saturation(nPhaseIdx)) / 2);
 
         // the heat conductivity of the matrix. in general this is a
         // tensorial value, but we assume isotropic heat conductivity.
-        Scalar heatCond = ldry + sqrt(Sw) * (lSw1-ldry) + sqrt(Sn) * (lSn1-ldry);
+        Scalar heatCond = lDry + sqrt(sw) * (lsw1-lDry) + sqrt(sn) * (lsn1-lDry);
 
         // the matrix heat flux is the negative temperature gradient
         // times the heat conductivity.
diff --git a/test/implicit/mpnc/forchheimer1pproblem.hh b/test/implicit/mpnc/forchheimer1pproblem.hh
index 95ede04a3077152624209f92f1b8cd5f03d98bbb..ff69997f6d474217fa58fcff358c5ab6de3f6a58 100644
--- a/test/implicit/mpnc/forchheimer1pproblem.hh
+++ b/test/implicit/mpnc/forchheimer1pproblem.hh
@@ -408,11 +408,11 @@ private:
         // calulate the capillary pressure
         const MaterialLawParams &matParams =
             this->spatialParams().materialLawParamsAtPos(globalPos);
-        PhaseVector pC;
-        MaterialLaw::capillaryPressures(pC, matParams, fs);
+        PhaseVector pc;
+        MaterialLaw::capillaryPressures(pc, matParams, fs);
         fs.setPressure(otherPhaseIdx,
                        fs.pressure(refPhaseIdx)
-                       + (pC[otherPhaseIdx] - pC[refPhaseIdx]));
+                       + (pc[otherPhaseIdx] - pc[refPhaseIdx]));
 
         // make the fluid state consistent with local thermodynamic
         // equilibrium
diff --git a/test/implicit/mpnc/forchheimer2pproblem.hh b/test/implicit/mpnc/forchheimer2pproblem.hh
index a8ba6a0e24863c02e84b18019a70a3f5fc9a7b52..8533d656dc039b48f88cce37eec4807ae7ef36cb 100644
--- a/test/implicit/mpnc/forchheimer2pproblem.hh
+++ b/test/implicit/mpnc/forchheimer2pproblem.hh
@@ -407,11 +407,11 @@ private:
         // calulate the capillary pressure
         const MaterialLawParams &matParams =
             this->spatialParams().materialLawParamsAtPos(globalPos);
-        PhaseVector pC;
-        MaterialLaw::capillaryPressures(pC, matParams, fs);
+        PhaseVector pc;
+        MaterialLaw::capillaryPressures(pc, matParams, fs);
         fs.setPressure(otherPhaseIdx,
                        fs.pressure(refPhaseIdx)
-                       + (pC[otherPhaseIdx] - pC[refPhaseIdx]));
+                       + (pc[otherPhaseIdx] - pc[refPhaseIdx]));
 
         // make the fluid state consistent with local thermodynamic
         // equilibrium
diff --git a/test/implicit/mpnc/forchheimerspatialparams.hh b/test/implicit/mpnc/forchheimerspatialparams.hh
index b0c25bdb41fe327172f67f82ea68b7716b469888..0be42cd92ece1ad8f2cb339a6f3dac656255e950 100644
--- a/test/implicit/mpnc/forchheimerspatialparams.hh
+++ b/test/implicit/mpnc/forchheimerspatialparams.hh
@@ -170,7 +170,7 @@ public:
     }
 
     /*!
-     * \brief Function for defining the parameters needed by constitutive relationships (kr-Sw, pc-Sw, etc.).
+     * \brief Function for defining the parameters needed by constitutive relationships (kr-sw, pc-sw, etc.).
      *
      * \param pos The global position of the sub-control volume.
      * \return the material parameters object
diff --git a/test/implicit/mpnc/obstacleproblem.hh b/test/implicit/mpnc/obstacleproblem.hh
index eaa243265cf7a49e4ee51938fc3d8e532b8ee91a..81669149f9a42b514cd7f4ecbe784f7871b8f44d 100644
--- a/test/implicit/mpnc/obstacleproblem.hh
+++ b/test/implicit/mpnc/obstacleproblem.hh
@@ -392,11 +392,11 @@ private:
         // calulate the capillary pressure
         const MaterialLawParams &matParams =
             this->spatialParams().materialLawParamsAtPos(globalPos);
-        PhaseVector pC;
-        MaterialLaw::capillaryPressures(pC, matParams, fs);
+        PhaseVector pc;
+        MaterialLaw::capillaryPressures(pc, matParams, fs);
         fs.setPressure(otherPhaseIdx,
                        fs.pressure(refPhaseIdx)
-                       + (pC[otherPhaseIdx] - pC[refPhaseIdx]));
+                       + (pc[otherPhaseIdx] - pc[refPhaseIdx]));
 
         // make the fluid state consistent with local thermodynamic
         // equilibrium
diff --git a/test/implicit/mpnc/obstaclespatialparams.hh b/test/implicit/mpnc/obstaclespatialparams.hh
index 4eb0da179348f64ddf056655ecc36b61bcc8bc44..ba487450d7ab3a7ab6b6a6a875371f2b51afa490 100644
--- a/test/implicit/mpnc/obstaclespatialparams.hh
+++ b/test/implicit/mpnc/obstaclespatialparams.hh
@@ -224,11 +224,11 @@ public:
 //                       porosity(element, fvElemGeom, j)) / 2;
 //
 //        Scalar lsat = pow(lGranite, (1-poro)) * pow(lWater, poro);
-//        Scalar ldry = pow(lGranite, (1-poro));
+//        Scalar lDry = pow(lGranite, (1-poro));
 //
 //        // the heat conductivity of the matrix. in general this is a
 //        // tensorial value, but we assume isotropic heat conductivity.
-//        Scalar heatCond = ldry + sqrt(Sl) * (ldry - lsat);
+//        Scalar heatCond = lDry + sqrt(Sl) * (lDry - lsat);
 //
 //        // the matrix heat flux is the negative temperature gradient
 //        // times the heat conductivity.
@@ -237,7 +237,7 @@ public:
 //    }
 
     /*!
-     * \brief Function for defining the parameters needed by constitutive relationships (kr-Sw, pc-Sw, etc.).
+     * \brief Function for defining the parameters needed by constitutive relationships (kr-sw, pc-sw, etc.).
      *
      * \param pos The global position of the sub-control volume.
      * \return the material parameters object
diff --git a/test/implicit/richards/richardslensproblem.hh b/test/implicit/richards/richardslensproblem.hh
index 5f0bdffa0f149570fe36fed81d1597109c1c267b..43e7d2a77acff7593d40f9e9feaa23b3a92f3ef3 100644
--- a/test/implicit/richards/richardslensproblem.hh
+++ b/test/implicit/richards/richardslensproblem.hh
@@ -294,10 +294,10 @@ public:
 private:
     void initial_(PrimaryVariables &values, const GlobalPosition &pos) const
     {
-        Scalar Sw = 0.0;
+        Scalar sw = 0.0;
         Scalar pc =
             MaterialLaw::pc(this->spatialParams().materialLawParams(pos),
-                            Sw);
+                            sw);
         values[pwIdx] = pnRef_ - pc;
     }