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Old   October 17, 2002, 22:44
Default SIMPLER!
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I am testing my SIMPLER code for incompressible fluid in a pipe. The problem is for the unsteady state solution the pressure field ossilates in the first several iterations (becomes negative and positive). The mass balance is conserved and I have fixed the pressure at the outlet and also fixed normal velocity at the inlet. You you tell me where I might have made the mistake?
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Old   October 18, 2002, 06:33
Default Re: SIMPLER!
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Could you send a copy to me? I want to check it on my project.
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Old   October 23, 2002, 13:26
Default Re: SIMPLER!
Jing Hung
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My personal recommendations for your references.

1. check the terms of boundary conditions in your algebra matrix. 2. check the solver of the matrix. 3. check the size of time step and space discretization for scheme stability.
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Old   October 26, 2002, 20:31
Default Re: SIMPLER!
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Thanks a lot. The main problem is the pressure for the transient part. I am sure that the solution for the steady state is correct but for the transient part it's wrong.
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