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RSM convergence

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Old   May 10, 2008, 10:20
Default RSM convergence
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khar
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Hello I am simulating the flow in a hydrocyclone. I am using RSM with a single water phase. I have tried to take into account all the recomandations appearing in the Fluent doc; developed profiles at the inlet, first computation with the k-e model until convergence, and low under-relaxation factors. I have also checked that Y* is consistent with my choice of standard wall function (between 10 and 47). The probleme is that I am unable to obtain convergence. The residuals are oscillating between 10e-2 and 10e-5. I can send to anyone a picture on the residuals behaviour. Thanks.
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Old   May 11, 2008, 15:50
Default Re: RSM convergence
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Valerio
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they are often very difficult to converge. Read documentation about convergece strategies for RSM. It's often usefull do some iteration with k-epsilon and after use RSM. (in a case I've done also 50 initial iteration with euler equations)
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