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February 11, 2009, 02:50 |
About run problem
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#1 |
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Hi,
I am using star CD for simulating compressible flow.I have two inlet and one outlet. Out of two inlets one is mass inlet while other is pressure inlet. Outlet is pressure outlet. I am not using stagnation or environmental pressure boundary for my problem. I have defined ULR as given below: for u,v,w: 0.4 p: 0.12 k,e:0.4 T:0.90 den : 1 I am using density as function of pressure and temperature. For first 300 iterations I treated problem as incompressible later I converted density as fiunction of pressure and temperature.Then,I made star to perform 4000 iterations.But I am observing that my mass residual is continueously fluctuating around 6x10-3. while other residuals have gone below 10-4. Can anybody please answer following questions: 1) Do I have achieved convergence? 2)If I have not near the convegence then how to bring down mass residual below 10-4? Any suggestions from expert is most welcome.Thanks in advance. |
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