Divergence of results using CFX

  • Last Post 10 January 2018
  • Topic Is Solved
yangyee posted this 08 January 2018

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!!!

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Raef.Kobeissi posted this 08 January 2018

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.


Raef Kobeissi

Min Zhang posted this 10 January 2018

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.

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yangyee posted this 10 January 2018

Thanks for your suggestion! Min Zhang