# Vorticity Vector#

Vorticity Vector = {yes | no}


## Description / Usage#

This option allows the user to output the vorticity vector to the output EXODUS II file. It applies to problems with the fluid momentum equations (see EQ = momentum* cards). The output nodal variables are named VORTX, VORTY, VORTZ.

The permissible values for this postprocessing option are:

 yes Calculate the vorticity vectors and store in the output EXODUS II file. no Do not calculate the vorticity vectors.

## Examples#

This example card requests that vorticity vectors be written to the EXODUS II file:

Vorticity Vector = yes


## Technical Discussion#

The vorticity vector function, $$\underline\omega$$ , is defined in terms of the velocity $$\underline\upsilon$$ as: