Dumux::DiffusivityConstantTortuosity< Scalar > Class Template Reference

Relation for the saturation-dependent effective diffusion coefficient. More...

#include <dumux/material/fluidmatrixinteractions/diffusivityconstanttortuosity.hh>

Inheritance diagram for Dumux::DiffusivityConstantTortuosity< Scalar >:

Description

template<class Scalar>
class Dumux::DiffusivityConstantTortuosity< Scalar >

Relation for the saturation-dependent effective diffusion coefficient.

The material law is:

\[ D_\text{eff,pm} = \phi * S_w * \tau * D \]

with a constant tau.

The default value is 0.5, empirically obtained in Carman 1937: Fluid flow through granular beds [12] Additionally, Bear 1972 [9] mentions values 0.4 and in the range of 0.56 to 0.8.

Static Public Member Functions
template<class VolumeVariables>
static Scalar	effectiveDiffusionCoefficient (const VolumeVariables &volVars, const int phaseIdx, const int compIdxI, const int compIdxJ)
	Returns the effective diffusion coefficient \(\mathrm{[m^2/s]}\) based on a constant tortuosity value.

Member Function Documentation

effectiveDiffusionCoefficient()

template<class Scalar>

template<class VolumeVariables>

Scalar Dumux::DiffusivityConstantTortuosity< Scalar >::effectiveDiffusionCoefficient ( const VolumeVariables & volVars, const int phaseIdx, const int compIdxI, const int compIdxJ )

inlinestatic

Returns the effective diffusion coefficient \(\mathrm{[m^2/s]}\) based on a constant tortuosity value.

Parameters

volVars	The Volume Variables
phaseIdx	the index of the phase
compIdxI	the component index i
compIdxJ	the component index j

---

The documentation for this class was generated from the following file:

• diffusivityconstanttortuosity.hh