Commit 55e3c0e1 authored by Theresa Schollenberger's avatar Theresa Schollenberger
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[documentation][fickslaw] first version of description

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* \brief Fick's law specilized for different discretization schemes.
* This file contains the data which is required to calculate
* diffusive mass fluxes due to molecular diffusion with Fick's law.
*
* Fick's law describes the molecular diffusion in multi-component systems. Diffusion fluxes are the net fluxes of components caused by the Brownian molecular motion and driven by concentration gradients \f$\textbf{grad}\, X\f$.
* \f[
* j_d = - \varrho_\alpha D_\alpha^\kappa \textbf{grad}\, X_\alpha^\kappa
* \f]
*
* Here Dακ is the molecular diffusion coefficient of component κ in phase α. In a porous medium, the
actual path lines are tortuous due to the impact of the solid matrix. This tortuosity and the impact of
κ
the presence of multiple fluid phases is accounted for by using an effective diffusion coefficient Dpm,α
:
κ
Dpm,α
= ϕτα Sα Dακ ,
(6.12)
where τα is the tortuosity of phase α.
*
*/
#ifndef DUMUX_FLUX_FICKS_LAW_HH
#define DUMUX_FLUX_FICKS_LAW_HH
......
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