Dumux::DiffusivityConstantTortuosity< Scalar > Class Template Reference

Relation for the effective diffusion coefficient with constant tortuosity. More...

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

Description

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

Constant Tortuosity

For DiffusivityConstantTortuosity, \( \tau = \text{const.} \), with default value 0.5, empirically obtained by Carman [19]. The value can be changed at runtime by setting parameter "SpatialParams.Tortuosity". This will change the value of \( \tau \), and therefore the effective diffusion coefficient wherever the function effectiveDiffusionCoefficient is used.

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 ( \(\mathrm{m^2/s}\)) More...

Member Function Documentation

effectiveDiffusionCoefficient()

template<class Scalar >

template<class VolumeVariables >

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

inlinestatic

Returns the effective diffusion coefficient ( \(\mathrm{m^2/s}\)) of component \( \kappa \) (index compIdxI) in phase \( \alpha \) based on a constant tortuosity coefficient: \( D^\kappa_{\text{eff},\alpha} = \phi S_\alpha \tau D^\kappa_\alpha \).

Parameters

volVars	The volume variables
phaseIdx	the index of phase \( \alpha \)
compIdxI	the component index i (the component diffusing in phase \( \alpha \))
compIdxJ	the component index j (the main component of phase \( \alpha \))

---

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

• diffusivityconstanttortuosity.hh