Relation for the effective diffusion coefficient with constant tortuosity. More...
#include <dumux/material/fluidmatrixinteractions/diffusivityconstanttortuosity.hh>
For DiffusivityConstantTortuosity, \( \tau = \text{const.} \), with default value 0.5, empirically obtained by Carman [carman1937]. 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 ( \(\mathrm{m^2/s}\)) | |
| 
 | inlinestatic | 
Returns the effective diffusion coefficient ( \(\mathrm{m^2/s}\)) of component \( \kappa \) (index compIdxI) in phase \( \alpha \) based on a constant tortuosity coefficient: \( D^\kappa_{\text{eff},\alpha} = \phi S_\alpha \tau D^\kappa_\alpha \).
| 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 \( \alpha \)) |