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I have a problem with the convergency of a case

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Old   August 21, 2006, 13:55
Default I have a problem with the convergency of a case
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Raul Martin
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Hello, Im Raul Martin, Im spanish aeronautical ingeneer student. Im doing a air intake like end carreer proyect and I not be able to do my problem converge so I need help. I already have descended the Courant Number until 0,1 but Im continued the same problem. Do somebody know what I can in this situation?Please I need a solution hurry up. Thank you
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Old   August 21, 2006, 15:33
Default Re: I have a problem with the convergency of a cas
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Ben
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Do you have anymore info about your problem???

Ben
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Old   August 21, 2006, 16:04
Default Re: I have a problem with the convergency of a cas
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Raul Martin
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Yes, I think I already have said my viscous model, its Spallart-Allmaras. The geometry is a nozzle convergence-divergence finished it in a plenum. Plenum is like a air box very very big. The mesh have 458011 Cells,1056835 Faces, 186066 Nodes. Discretization to flow and to modified turbulent viscosity are second order upwind. My under-relaxation factors are 0,8 to modified turbulent viscosity, 1 to turbulent viscosity and 1 solid. My fluid is ideal gas (air)and its a case in 3 dimensions with one pressure inlet and pressure outlet. If you need something more say me. Thank you Ben.

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Old   August 24, 2006, 04:44
Default Re: I have a problem with the convergency of a cas
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seeta
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y dont you reduce the under relaxation parameter and try it for that
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