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Compressible and Incompressible flow modelling

    • Rachit Bundiwal

      Hii , i am modelling a multiphase VOF problem and in it i need to run air as compressible and water as incompressible in a pressure based solver . can anyone help me out how to do that ?.

    • SRP
      Ansys Employee


      You need to air as a primary phase since it is compressible for better solution stability.

      Can you please explain in more detail what exactly problem you are facing while modeling?

      Thank you.

    • Rachit Bundiwal

      Hi thanks for reply , i am trying to simulate a swirl flow using K-e RNG , using velocity inlet as BC , for both the inlets . but the problem arises during the initialization , when primary inlet is selected it is not showing it . And showing absurd values . Any resons for that ?  

    • Rob
      Forum Moderator

      You may need to rethink how you initialise the problem. Pictures will help us understand what you're up to. 

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