Divergence of results using CFX

- January 8, 2018 at 10:55 am
  
  yangyee
  Subscriber
  
  When I use CFX to simulate the flow field of a compressor cascade. Sometimes I may encounter a problem: In the OUT-file, there is a notation "The maximum Mach number is very large(such as 3000, etc.)". Can someone tell me the reason? Thank you!!!
- January 8, 2018 at 11:07 am
  
  Raef.Kobeissi
  Subscriber
  
  Hello yangyee,
  
  It could be a multitude of issues. Could you attach the geometry or mesh to check . We need more info about the simulation to help you more.
  
  Cheers
- January 10, 2018 at 7:24 am
  
  Min Zhang
  Subscriber
  
  May be you can try to modify the TimeScale value (In "Solver-Control" option).
  
  In addition, since the flow endures strong adverse pressure gradient in the compressor cascade, you can perform a simulation by specifying a small outlet pressure and use it as the initial value for your actual case.
- January 10, 2018 at 10:33 am
  
  yangyee
  Subscriber
  
  Thanks for your suggestion! Min Zhang

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