diff --git a/CHANGELOG b/CHANGELOG
index c36cb6ece1295c374568ea7b5b017cc01ec16c23..30099f92115ed3c890eb7185cd26196523058a49 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -7,7 +7,8 @@ Differences Between DuMuX 2.7 and DuMuX 2.8
   CMake based build system as it is default since Dune 2.4.
 
 * IMPROVEMENTS and ENHANCEMENTS:
-  - The zero equation turbulence models (zeroeq) have been added as new models
+  - A bug in the diffusion term in the freeflow models has been fixed.
+  - Zero equation turbulence models (zeroeq) have been added as new models
     to the freeflow folder.
   - Tests for coupling a turbulent free flow using zeroeq turbulence models
     with flow in a porous medium have been added.
diff --git a/dumux/freeflow/stokes/stokesmodel.hh b/dumux/freeflow/stokes/stokesmodel.hh
index d9f36bfcfeb93a0b0fc2766a3ca0aee1e526208f..34aec854033d171204780c7ffa4554526495ce1a 100644
--- a/dumux/freeflow/stokes/stokesmodel.hh
+++ b/dumux/freeflow/stokes/stokesmodel.hh
@@ -38,7 +38,7 @@ namespace Dumux
 {
 /*!
  * \ingroup BoxStokesModel
- * \brief Adaptation of the box scheme to the Stokes model.
+ * \brief Adaption of the box scheme to the Stokes model.
  *
  * This model implements laminar Stokes flow of a single fluid, solving the momentum balance equation
  * \f[
diff --git a/dumux/freeflow/stokesnc/stokesncmodel.hh b/dumux/freeflow/stokesnc/stokesncmodel.hh
index 1791dd0a332d8a15a5be49095c3980311c9f19db..405a3ca4e30c68e1fc0f7108c74339fab9ae4da6 100644
--- a/dumux/freeflow/stokesnc/stokesncmodel.hh
+++ b/dumux/freeflow/stokesnc/stokesncmodel.hh
@@ -19,7 +19,7 @@
 /*!
  * \file
  *
- * \brief Adaptation of the box scheme to the n-component Stokes model.
+ * \brief Adaption of the box scheme to the n-component Stokes model.
  */
 #ifndef DUMUX_STOKESNC_MODEL_HH
 #define DUMUX_STOKESNC_MODEL_HH
@@ -34,7 +34,7 @@
 namespace Dumux {
 /*!
  * \ingroup BoxStokesncModel
- * \brief Adaptation of the box scheme to the compositional Stokes model.
+ * \brief Adaption of the box scheme to the compositional Stokes model.
  *
  * This model implements an isothermal n-component Stokes flow of a fluid
  * solving a momentum balance, a mass balance and conservation equations for \f$n-1\f$
diff --git a/dumux/freeflow/stokesncni/stokesncnimodel.hh b/dumux/freeflow/stokesncni/stokesncnimodel.hh
index b12f9d34a7341765cca4b5d8ad22fa030862637c..a1a961a8b154666a6515270c6e05ef9907aad3cc 100644
--- a/dumux/freeflow/stokesncni/stokesncnimodel.hh
+++ b/dumux/freeflow/stokesncni/stokesncnimodel.hh
@@ -19,7 +19,7 @@
 /*!
  * \file
  *
- * \brief Adaptation of the box scheme to the non-isothermal
+ * \brief Adaption of the box scheme to the non-isothermal
  *        n-component Stokes model.
  */
 #ifndef DUMUX_STOKESNCNI_MODEL_HH
@@ -35,7 +35,7 @@
 namespace Dumux {
 /*!
  * \ingroup BoxStokesncniModel
- * \brief Adaptation of the box scheme to the non-isothermal
+ * \brief Adaption of the box scheme to the non-isothermal
  *        n-component Stokes model.
  *
  * This model implements a non-isothermal n-component Stokes flow of a fluid
diff --git a/dumux/freeflow/zeroeq/zeroeqmodel.hh b/dumux/freeflow/zeroeq/zeroeqmodel.hh
index 426c5535a4ce63893c521be85913c8fb49ab3e9d..829c5059d26e0e73997abf431963a0e0ee91ab77 100644
--- a/dumux/freeflow/zeroeq/zeroeqmodel.hh
+++ b/dumux/freeflow/zeroeq/zeroeqmodel.hh
@@ -33,7 +33,7 @@ namespace Dumux
 {
 /*!
  * \ingroup BoxZeroEqModel
- * \brief Adaptation of the box scheme to the ZeroEq model.
+ * \brief Adaption of the box scheme to the ZeroEq model.
  *
  * This model implements an single-phase isothermal free flow
  * solving the mass and the momentum balance. For the momentum balance
diff --git a/dumux/freeflow/zeroeqnc/zeroeqncmodel.hh b/dumux/freeflow/zeroeqnc/zeroeqncmodel.hh
index 2dbd6ee9c66137b2dc5bd4465d289e22e9f3a62a..0e700bde04e9f2eb2665c3bb550cc4fa727857d4 100644
--- a/dumux/freeflow/zeroeqnc/zeroeqncmodel.hh
+++ b/dumux/freeflow/zeroeqnc/zeroeqncmodel.hh
@@ -32,7 +32,7 @@ namespace Dumux
 {
 /*!
  * \ingroup BoxZeroEqncModel
- * \brief Adaptation of the box scheme to the compositional ZeroEq model.
+ * \brief Adaption of the box scheme to the compositional ZeroEq model.
  *
  * This model implements an single-phase isothermal compositional free flow
  * solving the mass and the momentum balance. For the momentum balance
diff --git a/dumux/freeflow/zeroeqncni/zeroeqncnimodel.hh b/dumux/freeflow/zeroeqncni/zeroeqncnimodel.hh
index f3e7b16cb3419d96a1ce2afe6fce55e103903821..e3d7eb110f2cceaa8bd20370387548b67f2adb2e 100644
--- a/dumux/freeflow/zeroeqncni/zeroeqncnimodel.hh
+++ b/dumux/freeflow/zeroeqncni/zeroeqncnimodel.hh
@@ -33,7 +33,7 @@ namespace Dumux
 {
 /*!
  * \ingroup BoxZeroEqncniModel
- * \brief Adaptation of the box scheme to the non-isothermal compositional ZeroEq model.
+ * \brief Adaption of the box scheme to the non-isothermal compositional ZeroEq model.
  *
  * This model implements an single-phase non-isothermal compositional free flow
  * solving the mass and the momentum balance. For the momentum balance