Streamwise Normal Stress#

Streamwise normal stress = {yes | no}

Description / Usage#

The stream-wise normal stress, \(T_{tt}\), is defined as tt: \(\tau\), where t is the unit tangent vector to the streamlines computed as v ⁄ \(\mid\) v \(\mid\) and \(\tau\) is the deviatoric part of the dissipative stress tensor,


associated with the Navier-Stokes equations. This variable is called SNS in the output EXODUS II file.

The permissible values for this postprocessing option are


Calculate the stream-wise normal stress.


Do not calculate the stream-wise normal stress.


Following is a sample card:

Streamwise normal stress = yes

Technical Discussion#

As of 2/9/02 this function is computed with the based viscosity, and not the strain-rate dependent viscosity as might be the case for viscosity models other than NEWTONIAN (see Viscosity card).