diffusivityconstanttortuosity.hh

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#ifndef DUMUX_MATERIAL_DIFFUSIVITY_CONSTANT_TORTUOSITY_HH
#define DUMUX_MATERIAL_DIFFUSIVITY_CONSTANT_TORTUOSITY_HH
 
#include <dumux/common/parameters.hh>
 
namespace Dumux {
 
template<class Scalar>
class DiffusivityConstantTortuosity
{
public:
    static Scalar effectiveDiffusivity(const Scalar porosity,
                                       const Scalar saturation,
                                       const Scalar diffCoeff)
    {
        static const Scalar tau = getParam<Scalar>("SpatialParams.Tortuosity", 0.5);
 
        return porosity * saturation * tau * diffCoeff;
    }
};
 
} // end namespace Dumux
 
#endif // DIFFUSIVITY_CONSTANT_TORTUOSITY_HH