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no convergence at high pressure

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Old   October 22, 2007, 04:33
Default no convergence at high pressure
  #1
Toralf
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Hi,

I cannot reach the convergence criteria (1E-04) at 60 bar (SST, 2.2 million nodes, v=62 m/s, mesh quality nice). If I choose the pressure 1 bar, then I have a nice convergence after 100 steps. Please have somebody any idea how I can solve the problem? Thank you very much. Toralf
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Old   October 22, 2007, 06:59
Default Re: no convergence at high pressure
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Glenn Horrocks
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Hi,

Does the higher pressure induce higher flow velocities? Is it compressible flow so therefore it chokes? Higher flow velocities or significant compressibility effects often will slow convergence.

Glenn Horrocks
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Old   October 22, 2007, 07:02
Default Re: no convergence at high pressure
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Chirag
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Check reference pressure that you are setting. For, good convergence, it should be near to the pressure at which CFD domain is at.
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