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-   -   no convergence at high pressure (http://www.cfd-online.com/Forums/cfx/24699-no-convergence-high-pressure.html)

Toralf October 22, 2007 04:33

no convergence at high pressure
 
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

Glenn Horrocks October 22, 2007 06:59

Re: no convergence at high pressure
 
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

Chirag October 22, 2007 07:02

Re: no convergence at high pressure
 
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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