Navier Stokes Residuals

Navier Stokes Residuals = {yes | no}

Description / Usage

These post-processing nodal variables are constructed from the corresponding weighted residual function of the fluid (e.g. Navier-Stokes) momentum equations, using a Galerkin finite-element formulation. When activated with this card, variables named RMX, RMY, and RMZ appear in the output EXODUS II file, corresponding to each of the independent components of the fluid momentum balance.

The permissible values for this postprocessing option are:

yes	Calculate the Navier-Stokes residuals and store as nodal variables in the output EXODUS II file.
no	Do not calculate Navier-Stokes residuals.

Examples

Following is a sample input card:

Navier Stokes Residuals = no

Technical Discussion

This option can be used to help understand convergence behavior of a particular problem, as it allows the user to visualize the pattern of residuals over the computational domain during a Newton iteration process. The intermediate solutions of a Newton iteration process can be activated with the Write Intermediate Results card.