Fluids

Fluids

boundary Mach Number exceeds maximum limit, 9.8E-01

    • psayasith
      Subscriber

      Hello,

      I am currently trying to model the gas flow coming from atmosphere, through a 0.381 mm capillary, into the first region of a vacuum chamber. Based upon the results from past literature, the incoming jet should have a velocity of 780 m/s, putting it above the max mach number that I'm allowed. I'm currently using the pressure based solver with a mass flow inlet and a pressure outlet, with a target mass flow. How can I change this number, or is this tied to the solver I'm using?

      Sincerely,

      Peyton

    • Murari Iyengar
      Ansys Employee
      Hi Please use a density based solver as the flow speed is greater than Mach 1. This should fix your issue.
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