Reynolds number and turbulence equation choice

Altair Forum User

Hello everyone. I have a model with a Reynolds number equal to about 7 * 10^6. If I run the transient simulation with the 'turbulence equation' as Spalart Allmaras the analysis stops with an error ('negative absolute pressure for material model'), while simulating as Laminar the analysis is successful. Can I make this approximation?

ydigit

Could you post the .inp and .Log file.

It seems that you are using a ideal gas model. Try with constatnt properties of the fluid.