rhoSimpleFoam :: Maximum number of iterations exceeded
Hi all,
I am trying to solve a case with time varying Boundary conditions using uniformValue and rhoSimpleFoam. The input given for patches in p and T is in tabular form while the U is set as 'pressureInletVelocity' It is solving upto 2 clock time while afterwards it says Quote:
http://www.cfd-online.com/Forums/ope...implefoam.html http://www.cfd-online.com/Forums/ope...-exceeded.html http://www.cfd-online.com/Forums/ope...implefoam.html but got the same results. Now I changed the solver for 'p' from GAMG to DICPCG and next time to PCG (because I think that the problem is with 'p' only). and still the same thing. Please help me ASAP... Thanks and Regards, Adarsh Tiwari |
Dear Adarsh,
rhoSimpleFoam is a steady-state solver. If you want use time varying boundary condition try to use rhoPimpleFoam |
Greetings Betakv,
I have already simulated using rhoPimpleFoam but I got some fancy results, with best of my knowledge I can say that the probability of getting appropriate results is much more higher in rhoSimpleFoam. It would be great help if you provide me some tutorials about rhoSimpleFoam, I already have one, but it is not worth about this case. :):) Thanks and Regards, Adarsh Tiwari |
Dear Adarsh,
there are number of reasons( boundary/initial condition, solver setting, ... ) why you got fancy results. Can you send description of your case? |
1 Attachment(s)
Greeting Betakv,
sorry for late reply. The file is too large to upload hence i am attaching the brief version of the same but by removing some of the data-table entries. In pressure files I have also tried with the uniformTotalPressure but still got nothing in solution schemes also i have changed form GAMG to different solver. I have also tried with faceCente and cellCenter schemes. Thanks and Regards, Adarsh Tiwari |
Dear Adarsh,
you have quite lot of errors in boundary condition especially on the inlet and outlet. On the inlet you have to prescribe a totalPressure bc for pressure. On the outlet you have to prescribe zeroGradient or inletOutlet bc for velocity and temperature betakv Quote:
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hi Betakv,
As I already informed you that the p and T boundary conditions are fixed, only thing I can play with is U. I used zeroGradient and inletOutlet bc for velocity with different combinations but still getting the same message out. |
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