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Question about pressure inlet boundary condition.

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Old   November 30, 2007, 08:24
Default Question about pressure inlet boundary condition.
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Alina
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I am now simulating a 2D blade cascade problem. The object is one 2D blade with its channel. Periodic boundary conditions are used on the sides of the passage. Now I have to put pressure boundary conditions on inlet and outlet. I know the total pressure of inlet and static back pressure of outlet, but I don't know static pressure of inlet, so I use 0 Gauge pressure of the static pressure. However, the program always send error messages. Even I change the static pressure of inlet, the error is always there. Is it important to set the static pressure of inlet exactly? Or what would happen to cause this kind of message?

The message is like "temperature divergence", "pressure divergence", etc.
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Old   November 30, 2007, 08:39
Default Re: Question about pressure inlet boundary conditi
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HaiDuc
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Hi Alina,

You have to check the Solution Control, especially the under-relaxation factors and discretizations.

For more information for under-ralaxation factors: http://venus.imp.mx/hilario/SuperCom...e615.htm#92857

For more information for discretizations: http://venus.imp.mx/hilario/SuperCom...ml/node606.htm

good luck

Hai Duc
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