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Which Solver/Model to use for flow over Circular Cylinder ? Re [1 , 10^6] |
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December 4, 2010, 09:11 |
Which Solver/Model to use for flow over Circular Cylinder ? Re [1 , 10^6]
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#1 |
New Member
Wolfgang Strauss
Join Date: Nov 2010
Location: Germany / Bavaria / Eichstätt
Posts: 15
Rep Power: 15 |
hi guys!
I have a solver-question and need your experience. Want to simulate and compare (with literatur) the flow over a circular cylinder for Re = 1 till 1 000 000 with blockMesh and snappyHexMesh. This will be my first work with OpenFoam and i have no experience with different solvers and models. Up to now i only used simpleFoam kOmegaSST from the motorbike tutorial, because my forrunner used it. But in my case i think it doesn´t work very well. Can somebody tell me what solver/model would be the best for what Re-region??? Thanks in advance! best regards Wolfgang |
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December 6, 2010, 03:48 |
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#2 |
Senior Member
Markus Rehm
Join Date: Mar 2009
Location: Erlangen (Germany)
Posts: 184
Rep Power: 17 |
Hi Wolfgang,
as long as your flow is incompressible (Ma<0.3) you can stay with simpleFoam. The kWSST model is ok as well. You can also change to k-epsilon which I find is a bit more robust. You must especially be careful with the wall functions (nutWallFunction in 0/nut). For the standard wall function the yPlus should be around 30 ... 300. So you need to adapt the grid for every Re. Markus |
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