# Question about pressure inlet boundary condition.

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 November 30, 2007, 08:24 Question about pressure inlet boundary condition. #1 Alina Guest   Posts: n/a 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.

 November 30, 2007, 08:39 Re: Question about pressure inlet boundary conditi #2 HaiDuc Guest   Posts: n/a 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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