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October 10, 2011, 15:13 |
rhoSimplecFoam, solving rho
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#1 |
New Member
Jason
Join Date: Aug 2011
Posts: 10
Rep Power: 15 |
Hi,
I've got a problem with rhoSimplecFoam. I got a case which is quite similar to the squareBend in the tutorials but with symmetryPlanes on each side. My problem is, that although I copied all BCs, the solver won't solve rho. It says "rho max/min : 1 1" in each time step. But when I run squareBend it solves rho perfectly. Any ideas where my problem could be? Thanks a lot. Best regards Jason Edit: And I can't edit rho in any way, too. If I create a rho-BC the solver ignores it. |
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October 13, 2011, 05:46 |
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#2 |
New Member
Jason
Join Date: Aug 2011
Posts: 10
Rep Power: 15 |
Hi,
I now know where the problem is. The temperature in my case is quite low, so the initial density would be >1. But somehow the solver doesn't solve densities above 1. I tried different temperatures and it all works fine with densities <1 but as soon as I get values above 1, the value is fixed at 1. Although I know the problem, I don't know the solution. Have you got any ideas? I would be very tankful. Best Jason |
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October 13, 2011, 06:57 |
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#3 |
New Member
Jason
Join Date: Aug 2011
Posts: 10
Rep Power: 15 |
I now switched to rhoPimpleFoam because it solves the density correctly. It's not the solution for the problem but it's ok for now....
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October 14, 2011, 04:01 |
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#4 |
Member
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Maybe you forgot changing the rhoMax entry in the SIMPLE subDict of the fvSolution dictionary
SIMPLE { nNonOrthogonalCorrectors 0; rhoMin rhoMin [1 -3 0 0 0] 0.1; rhoMax rhoMax [1 -3 0 0 0] 1.0; transonic yes; } If you will put reasonable values for your case I do not doubt that the solution will show the actual density values.
__________________
Cosimo Bianchini Ergon Research s.r.l. Via Panciatichi, 92 50127 Florence - ITALY Tel: +39 055 0763716 Mob: +39 320 9460153 e-mail: cosimo.bianchini@ergonresearch.it URL: www.ergonresearch.it |
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October 14, 2011, 05:54 |
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#5 |
New Member
Jason
Join Date: Aug 2011
Posts: 10
Rep Power: 15 |
Thank you very very much, I think that's the solution .
Best Jason PS: rhoPimpleFoam was not the right solver.... |
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