Dumux::DiffusivityConstantTortuosity< Scalar > Class Template Reference

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

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

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 [10] mentions values 0.4 and in the range of 0.56 to 0.8.

Static Public Member Functions
static Scalar	effectiveDiffusivity (const Scalar porosity, const Scalar saturation, const Scalar diffCoeff)
	Returns the effective diffusion coefficient \(\mathrm{[m^2/s]}\) based on a constant tortuosity value. More...

Member Function Documentation

effectiveDiffusivity()

template<class Scalar >

static Scalar Dumux::DiffusivityConstantTortuosity< Scalar >::effectiveDiffusivity ( const Scalar  porosity, const Scalar  saturation, const Scalar  diffCoeff  )

inlinestatic

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

Parameters

porosity	The porosity
saturation	The saturation of the wetting phase
diffCoeff	The diffusion coefficient of the phase in \(\mathrm{[m^2/s]}\)

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

• diffusivityconstanttortuosity.hh