Grid Peclet Number in Porous Media

Grid Peclet Number in porous media = {yes | no}

Description / Usage

This option triggers the computation and output of the so-called grid-level Peclet number as a nodal variable in the output EXODUS II file. It appears as a nodal variable called Por_Grid_Peclet. This quantity gives the user a measure of advective transport relative to diffusive transport in a porous medium, and is strongly correlated to the steepness of a saturation front. This quantity is actually used to scale the formulation which employs the streamline upwind Petrov-Galerkin method for stabilizing the equations for partially saturated flow. This option only applies for unsaturated media and only for the SUPG option on the Porous Weight Function card.

The permissible values for this postprocessing option are:

yes	Compute the grid-level Peclet Number and write to output EXODUS II file.
no	Do not calculate the grid-level Peclet Number.

Examples

This is a sample input card to activate calculation of the Peclet Number:

Grid Peclet Number in porous media = yes

Technical Discussion

See discussion for the Porous Weight Function card.

References

GTM-029.0: SUPG Formulation for the Porous Flow Equations in Goma, H. K. Moffat, August 2001 (DRAFT).