Reynolds number and turbulence equation choice

Altair Forum User
Altair Forum User
Altair Employee
edited October 2020 in Community Q&A
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?
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  • ydigit
    ydigit
    Altair Employee
    edited April 2018

    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.

     

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