Merge branch 'cleanup/problem-slides' into 'master'

[slides][problem] Add generic interfaces for initial and boundary conditions 

See merge request !287

slides/problem.md

@@ -227,6 +227,24 @@ PrimaryVariables dirichletAtPos(const GlobalPosition& globalPos) const
 
 ##
 
+More general Dirichlet boundary functions:
+```cpp
+PrimaryVariables dirichlet(const Element &element, 
+                           const SubControlVolumeFace &scvf) const
+{
+    ...
+}
+```
+```cpp
+PrimaryVariables dirichlet(const Element &element, 
+                           const SubControlVolume &scv) const
+{
+    ...
+}
+```
+
+##
+
 Neumann boundary condition values / boundary fluxes (only called on Neumann boundaries)
 
 ```cpp
@@ -247,6 +265,21 @@ NumEqVector neumannAtPos(const GlobalPosition& globalPos) const
 
 ##
 
+More general Neumann boundary function:
+
+```cpp
+template<class ElementVolumeVariables, class ElementFluxVariablesCache>
+NumEqVector neumann(const Element& element,
+                    const FVElementGeometry& fvGeometry,
+                    const ElementVolumeVariables& elemVolVars,
+                    const ElementFluxVariablesCache& elemFluxVarsCache,
+                    const SubControlVolumeFace& scvf) const
+{
+    ...
+}
+```
+##
+
 Initial conditions:
 
 ```cpp
@@ -274,6 +307,21 @@ NumEqVector sourceAtPos(const GlobalPosition &globalPos) const
 { return NumEqVector(0.0); }
 ```
 
+##
+
+More general source/sink function:
+
+```cpp
+template<class ElementVolumeVariables>
+NumEqVector source(const Element &element,
+                   const FVElementGeometry& fvGeometry,
+                   const ElementVolumeVariables& elemVolVars,
+                   const SubControlVolume &scv) const
+{
+    ...
+}
+```
+
 # Spatial Parameters definition
 
 ## Spatial parameters
@@ -373,7 +421,7 @@ See [Part I: Runtime parameters](./params.html) for details.
 ## Main program
 
 * Each problem has one main file (`test_name.cc` or `main.cc`)
-* Here: `2pmain.cc` and `2p2cmain.cc`
+* Here: `2pmain.cc` and `2pnimain.cc`
 * Contains the `main` function (mandatory in C/C++ programs)
 
 ## Main function