Fluids

Fluids

Defining supersonic outlet

    • imungan
      Subscriber

      I would like to define the outlet bc as supersonic outlet. In user guide, noted that "Should the flow become locally supersonic, the specified pressure will no longer be used; pressure will be extrapolated from the flow in the interior. All other flow quantities are extrapolated from the interior." However when i changed the value of outlet pressure for my supersonic case, the exit mach number is changed.

       

      I will be pleased if anyone can clarify this issue

       

    • DrAmine
      Ansys Employee

      At the outlet / near the outlet is the flow subsonic?

    • imungan
      Subscriber

      Domain is entirely supersonic :)

    • DrAmine
      Ansys Employee

      If you just check all other properties and velocity fields: any difference. I can think that it is a post-processing issue wrt Mach number.

    • imungan
      Subscriber

      my case is hypersonic internal flow. So i am sure that my flow is remained supersonic throughout the domain. While i remain the pressure outlet as default, no error is occured. This may be correct but not sure

    • DrAmine
      Ansys Employee

      As mentioned in my post if velocity field and temperature field and pressure field are not changing then I guess it is a post-processing issue. Please check that.

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