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version 3.8
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version 3.8
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Dispersion flux for different discretization schemes. More...
#include <dumux/flux/dispersionflux_fwd.hh>#include <dumux/flux/box/dispersionflux.hh>#include <dumux/flux/cctpfa/dispersionflux.hh>Go to the source code of this file.
Phenomenologically, dispersion is a similar process to diffusion. However, the additional spreading of components is due to fluctuations of magnitude and direction of the flow velocities.
By replacing the diffusion coefficient \(D_\alpha^\kappa\) with \(D_{\alpha,eff}^\kappa\) in Fick's law the velocity-dependent effects of dispersion can be expressed [12].
\[ D_{\alpha,eff}^\kappa = D_\alpha^\kappa + D_{\alpha,disp}^\kappa(\textbf{v}_\alpha) \]
Possible options of describing the dispersion tensors can be found in [72].
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