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Commit 0bb6ce89 authored by Christoph Grüninger's avatar Christoph Grüninger
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[handbook] Improve sub-section concerning available models.

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...@@ -104,7 +104,7 @@ used to order the blocks. ...@@ -104,7 +104,7 @@ used to order the blocks.
\node at (10,4) {${eqIdx}$}; \node at (10,4) {${eqIdx}$};
\node at (10,3.4) {$0$}; \node at (10,3.4) {$0$};
\node at (10,2.8) {$1$}; \node at (10,2.8) {$1$};
\node at (10,2.2) {$\dots$}; \node at (10,2.2) {$\vdots$};
\node at (10,1.6) {$m-1$}; \node at (10,1.6) {$m-1$};
\fill (11.1,2.1) rectangle (11.3,2.9); \fill (11.1,2.1) rectangle (11.3,2.9);
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...@@ -124,35 +124,31 @@ $\boldsymbol{v}_\alpha$ & velocity (Darcy or free flow)& & \\ ...@@ -124,35 +124,31 @@ $\boldsymbol{v}_\alpha$ & velocity (Darcy or free flow)& & \\
\end{figure} \end{figure}
\subsection{Available Models} \subsection{Available Models}
\todo{modelliste einfügen, auf doxygen verweisen, Text überarbeiten (Christoph)} We distinguish fully-implicit and decoupled models. A list of all available models can be found
in the Doxygen documentation at
The following description of the available models is automatically extracted \url{http://www.dumux.org/doxygen-stable/html-2.8/modules.php}.
from the Doxygen documentation. The documentation includes a detailed description for every model.
\subsection{Implicit and Decoupled Models}
\subsubsection{Fully-Implicit Models} \subsubsection{Fully-Implicit Models}
\todo{überarbeiten (Christoph)} The fully-implicit models are using the box or the
The fully-implicit models described in this section are using the box or the cell-centered finite volume method as described in section \ref{box} and \ref{cc}
cell centered finite volume method as described in section \ref{box} and \ref{cc}
for spatial and the implicit Euler for spatial and the implicit Euler
method as temporal discretization. The models themselves are located in method as temporal discretization. The models are located in
subdirectories of \texttt{dumux/implicit} of the \Dumux distribution. subdirectories of \texttt{dumux/implicit}.
\subsubsection{Decoupled Models} \subsubsection{Decoupled Models}
\todo{überarbeiten (Christoph)} The basic idea of the decoupled models is to reformulate the
The basic idea the so-called decoupled models have in common is to reformulate the
equations of multi-phase flow into one equation for equations of multi-phase flow into one equation for
pressure and equations for phase-/component-/etc. transport. The pressure equation pressure and equations for phase/component/... transport. The pressure equation
is the sum of the mass balance equations and thus considers the total flow of the is the sum of the mass balance equations and thus considers the total flow of the
fluid system. The new set of equations is considered as decoupled (or weakly coupled) fluid system. The new set of equations is considered as decoupled (or weakly coupled)
and can thus be solved sequentially. The most popular decoupled model is the so-called and can thus be solved sequentially. The most popular decoupled model is the
fractional flow formulation for two-phase flow which is usually implemented applying fractional flow formulation for two-phase flow which is usually implemented applying
an IMplicit Pressure Explicit Saturation algorithm (IMPES). an IMplicit Pressure Explicit Saturation algorithm (IMPES).
In comparison to a fully implicit model, the decoupled structure allows the use of In comparison to a fully implicit model, the decoupled structure allows the use of
different discretization methods for the different equations. The standard method different discretization methods for the different equations. The standard method
used in the decoupled models is a cell centered finite volume method. Further schemes, used in the decoupled models is a cell-centered finite volume method. Further schemes,
so far only available for the two-phase pressure equation, are cell centered finite so far only available for the two-phase pressure equation, are cell-centered finite
volumes with multi-point flux approximation (MPFA O-method) and mimetic finite differences. volumes with multi-point flux approximation (MPFA O-method) and mimetic finite differences.
An $h$-adaptive implementation of both decoupled models is provided for two dimensions. An $h$-adaptive implementation of both decoupled models is provided for two dimensions.
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