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diff --git a/dumux/discretization/staggered/freeflow/staggeredgeometryhelper.hh b/dumux/discretization/staggered/freeflow/staggeredgeometryhelper.hh
index d78655e90582b2d31e6807dbecec6a39e1ac96e4..7cc7086edc7ea8627ceb6a2e1a47eaf144838f84 100644
--- a/dumux/discretization/staggered/freeflow/staggeredgeometryhelper.hh
+++ b/dumux/discretization/staggered/freeflow/staggeredgeometryhelper.hh
@@ -66,6 +66,11 @@ inline static unsigned int directionIndex(Vector&& vector)
* \ingroup StaggeredDiscretization
* \brief Helper class constructing the dual grid finite volume geometries
* for the free flow staggered discretization method.
+ *
+ * A visualization of the variables that are in this document can be found in the following image:
+ *
+ * \image html staggeredgeometry.png
+ *
*/
template<class GridView>
class FreeFlowStaggeredGeometryHelper
diff --git a/dumux/multidomain/subdomainstaggeredlocalassembler.hh b/dumux/multidomain/subdomainstaggeredlocalassembler.hh
index af978a29ac258164df0bb745347667cc2c52e943..ca6b17dacd2bdbb1dfc26c2fe10b39f9991b8107 100644
--- a/dumux/multidomain/subdomainstaggeredlocalassembler.hh
+++ b/dumux/multidomain/subdomainstaggeredlocalassembler.hh
@@ -467,6 +467,20 @@ class SubDomainStaggeredLocalAssembler;
* \ingroup StaggeredDiscretization
* \ingroup MultiDomain
* \brief Staggered scheme local assembler using numeric differentiation and implicit time discretization
+ *
+ * The assembly of the cellCenterResidual is done element-wise, the assembly of the face residual is done half-element-wise.
+ *
+ * A sketch of what this means can be found in the following image:
+ *
+ * \image html staggered_halfelementwise.png
+ *
+ * Half-element wise assembly means, that integrals are
+split into contributions from the left and right part of the staggered control volume. For an example term \f$\int_{\Omega}\varrho u\text{d}\Omega\f$ this reads
+\f$\int_{\Omega}\varrho u\text{d}\Omega = \frac{1}{2}\Omega_\text{left}\varrho_\text{left}u+\frac{1}{2}\Omega_\text{right}\varrho_\text{right}u\f$.
+
+During assembly, \f$\frac{1}{2}\Omega_\text{left}\varrho_\text{left}u\f$ is added to the residual of the
+staggered control volume \f$\Omega\f$, when the loops reach the scvf within element \f$\Omega_\text{left}\f$. \f$\frac{1}{2}\Omega_\text{right}\varrho_\text{right}u\f$ is added to the residual of \f$\Omega\f$, when the loops reach the scvf within in element \f$\Omega_\text{right}\f$.
+Other terms are split analogously.
*/
template<std::size_t id, class TypeTag, class Assembler>
class SubDomainStaggeredLocalAssembler<id, TypeTag, Assembler, DiffMethod::numeric, /*implicit=*/true>