2 Replies Latest reply on Feb 6, 2018 4:21 AM by Bence Rivasz

    Flow simulation with compressible gas but at higher flow rate something always goes wrong.

    Bence Rivasz

      Hi, im doing a flow simulation with compressible gas (air) but at higher flow rate something always goes wrong.

      Until about 7 l/min everything looks good, the pressure start convergence, ∆P is about 0,5 bar what looks realistic, but over 8 l/min the pressure goes up

      independently from the initial Flow rate, and keep the raising  until i stop the simulation manually. (so its hard to belive that ~15% more flow can make infinite pressure)

      With more flow so like 10-15 l/min the different is only that the pressure goes up faster.

      I tried to refine the mesh or rerun it with a bigger environment (longer inlet and the outlet as a big box) but the result is always the same.

      Can someone help about about explain this difficulties and how to solve them?

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