7.6.17.34.18. Tensorial_Dispersive

Syntax

Species Diffusion [{of} SpeciesName] = Tensorial_Dispersive (Alpha_T = alpha_t | Alpha_L = alpha_l | Tau = tau | [Epsilon = epsilon])

Scope

Aria Material

Description

The form of flux is

$\bf{J} = -\left( \alpha_t ||\bf{v}|| + (\alpha_l - \alpha_t) \frac{\bf{v} \times \bf{v}}{||\bf{v}||} + \tau \phi S D_i \nabla C_i \right)$

where $\bf{v}$ is the velocity, $\tau$ the tortuosity, $\phi$ the porosity, $S$ the saturation, $D_i$ the species diffusivity and $C_i$ the species concentration.

Parameter	Value	Default
{of}	{of \| species \| subindex}	–
SpeciesName	string	–
alpha_t	real	–
alpha_l	real	–
tau	real	–
epsilon	real	1e-06