13#ifndef DUMUX_MATERIAL_DIFFUSIVITY_CONSTANT_TORTUOSITY_HH 
   14#define DUMUX_MATERIAL_DIFFUSIVITY_CONSTANT_TORTUOSITY_HH 
   54    template<
class VolumeVariables>
 
   61        const Scalar diffCoeff = volVars.diffusionCoefficient(phaseIdx, compIdxI, compIdxJ);
 
   62        return volVars.porosity() * volVars.saturation(phaseIdx) * tau * diffCoeff;
 
 
 
Relation for the effective diffusion coefficient with constant tortuosity.
Definition diffusivityconstanttortuosity.hh:40
static Scalar effectiveDiffusionCoefficient(const VolumeVariables &volVars, const int phaseIdx, const int compIdxI, const int compIdxJ)
Returns the effective diffusion coefficient ( )
Definition diffusivityconstanttortuosity.hh:55
T getParam(Args &&... args)
A free function to get a parameter from the parameter tree singleton.
Definition parameters.hh:139
The infrastructure to retrieve run-time parameters from Dune::ParameterTrees.