boundary Mach Number exceeds maximum limit, 9.8E-01

- March 29, 2022 at 2:44 pm
  
  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
- March 30, 2022 at 11:48 am
  
  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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