Need help with a pipe flow simulation with pressure inlet and outlet boundary conditions

    • karoo178


      My name is Khanh. I am trying to learn about different inlet and outlet boundary conditions in Ansys. However, I run into a problem with a made-up example where I tried to simulate a flow in a pipe with pressure inlet and outlet boundary conditions.

      The pipe dimension was: radius = 10 mm, and length = 20 mm

      The inlet pressure was 2 bar or 200,000 Pa and the outlet pressure was 1 atm or 101,325 Pa.

      I set the operating pressure at 101,325 Pa, inlet gauge total pressure 98,675 Pa and outlet gauge pressure 0 Pa. I used air at 20 C as the fluid.

      When I ran the simulation, the inlet pressure did not stay constant as I expected it should. Could anyone please help explain what is going on? I feel like I have misunderstood the physics very badly. Please help.

    • Keyur Kanade
      Ansys Employee
      Please use velocity inlet and pressure outlet boundary condition as it is most robust. Please go through help manual for more details
      Regards Keyur
      How to access Ansys Online Help Document
      Guidelines on the Student Community

Viewing 1 reply thread
  • You must be logged in to reply to this topic.