# Velocity Divergence#

Velocity Divergence = {yes | no}


## Description / Usage#

The divergence of velocity is associated with local mass conservation or how well the solenoidal character of the velocity field in ARBITRARY mesh motion regions is being maintained. (Fluid momentum equations are only applied for this Mesh Motion option.) Here we calculate the $$L_2$$ norm of the divergence of velocity so that it is always zero or positive. This variable is called DIVV in the output EXODUS II file.

The permissible values for this postprocessing option are:

 yes Calculate the velocity divergence. no Do not calculate the velocity divergence.

## Examples#

A sample input specification for this card is:

Velocity Divergence = no


## Technical Discussion#

The divergence of the fluid velocity field is defined as the scalar $$\Delta$$$$\underline{v}$$.

No References.