[doxygen] Add some new ingroups in modules.txt and use them in the files.

doc/doxygen/modules.txt

@@ -305,6 +305,11 @@
      * \defgroup FEMDiscretization Finite element method
      * \brief The finite element method
      */
+    /*!
+     * \ingroup Discretization
+     * \defgroup PoreNetworkDiscretization Pore network model discretization
+     * \brief The pore-network model discretization.
+     */
 /* ***************** Flux ******************/
 /*!
  * \defgroup Flux Flux
@@ -330,6 +335,11 @@
          * \defgroup CCMpfaFlux Flux related to the cell-centered multi-point flux approximation schemes
          * \brief Flux related to the cell-centered multi-point flux approximation schemes
          */
+    /*!
+     * \ingroup Flux
+     * \defgroup PoreNetworkFlux Flux related to the pore network models
+     * \brief Flux related to the pore newtwork models
+     */
     /*!
      * \ingroup Flux
      * \defgroup StaggeredFlux Flux related to the staggered scheme
@@ -602,3 +612,9 @@
       * \brief Two-phase (immiscible) flow
       * For a detailed model description see porenetwork/2p/model.hh
       */
+
+ /* ***************** TimeStepping ******************/
+ /*!
+  * \defgroup TimeStepping Time stepping
+  * \brief The time stepping
+  */

dumux/discretization/porenetwork/fvelementgeometry.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Base class for the local geometry for porenetworks
  */
 #ifndef DUMUX_DISCRETIZATION_PNM_FV_ELEMENT_GEOMETRY_HH
@@ -31,7 +31,7 @@
 namespace Dumux::PoreNetwork {
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Base class for the local geometry for porenetworks
  * \tparam GG the finite volume grid geometry type
  * \tparam enableFVGridGeometryCache if the grid geometry is cached or not

dumux/discretization/porenetwork/gridgeometry.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Base class for the finite volume geometry for porenetwork models
  */
 #ifndef DUMUX_DISCRETIZATION_PNM_GRID_GEOMETRY_HH
@@ -459,7 +459,7 @@ private:
 };
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief The default traits
  * \tparam the grid view type
  */
@@ -669,7 +669,7 @@ private:
 };
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Base class for the finite volume geometry for porenetwork models
  * \note For caching disabled we store only some essential index maps to build up local systems on-demand in
  *       the corresponding FVElementGeometry

dumux/discretization/porenetwork/subcontrolvolume.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief the sub control volume for pore networks
  */
 #ifndef DUMUX_DISCRETIZATION_PNM_SUBCONTROLVOLUME_HH
@@ -32,7 +32,7 @@
 namespace Dumux::PoreNetwork {
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Default traits class
  * \tparam GV the type of the grid view
  */
@@ -53,7 +53,7 @@ struct PNMDefaultScvGeometryTraits
 };
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief the sub control volume for porenetworks
  * \tparam GV the type of the grid view
  * \tparam T the scv geometry traits

dumux/discretization/porenetwork/subcontrolvolumeface.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Base class for a sub control volume face
  */
 #ifndef DUMUX_DISCRETIZATION_PNM_SUBCONTROLVOLUMEFACE_HH
@@ -30,7 +30,7 @@
 namespace Dumux::PoreNetwork {
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkDiscretization
  * \brief Default traits class
  * \tparam GV the type of the grid view
  */

dumux/flux/porenetwork/advection.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkFlux
  * \brief This file contains the data which is required to calculate
  *        the fluxes of the pore network model over a face of a finite volume.
  */
@@ -39,7 +39,7 @@ namespace Dumux::PoreNetwork {
 
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkFlux
  * \brief Hagen–Poiseuille-type flux law to describe the advective flux for pore-network models.
  */
 template<class ScalarT, class... TransmissibilityLawTypes>

dumux/flux/porenetwork/fickslaw.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkFlux
  * \brief This file contains the data which is required to calculate
  *        diffusive mass fluxes due to molecular diffusion with Fick's law.
  */
@@ -33,7 +33,7 @@
 namespace Dumux::PoreNetwork {
 
 /*!
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkFlux
  * \brief Specialization of Fick's Law for the pore-network model.
  */
 template<class Scalar, int numPhases, int numComponents,

dumux/flux/porenetwork/fourierslaw.hh

@@ -18,7 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
- * \ingroup PoreNetworkModels
+ * \ingroup PoreNetworkFlux
  * \brief This file contains the data which is required to calculate
  *        diffusive heat fluxes with Fourier's law.
  */
@@ -38,7 +38,7 @@ struct NoDiffusionType {};
 } // end namespace Detail
 
  /*!
-  * \ingroup PoreNetworkModels
+  * \ingroup PoreNetworkFlux
   * \brief Specialization of Fourier's Law for the pore-network model.
   */
 template<class MolecularDiffusionType = Detail::NoDiffusionType>

dumux/timestepping/multistagemethods.hh

@@ -18,6 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
+ * \ingroup TimeStepping
  * \brief Parameters for different multistage time stepping methods
  * \note See e.g. https://en.wikipedia.org/wiki/List_of_Runge%E2%80%93Kutta_methods
  */

dumux/timestepping/multistagetimestepper.hh

@@ -18,6 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
+ * \ingroup TimeStepping
  * \brief A time stepper performing a single time step of a transient simulation
  */
 #ifndef DUMUX_TIMESTEPPING_MULTISTAGE_TIMESTEPPER_HH

dumux/timestepping/timelevel.hh

@@ -18,6 +18,7 @@
  *****************************************************************************/
 /*!
  * \file
+ * \ingroup TimeStepping
  * \brief Class that represents a time level during time integration.
  */
 #ifndef DUMUX_TIMESTEPPING_TIME_LEVEL_HH