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[Commercial meshers] Periodics using ICEM and OpenFOAM |
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September 2, 2013, 12:27 |
Periodics using ICEM and OpenFOAM
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#1 |
New Member
Agustin
Join Date: Aug 2013
Posts: 4
Rep Power: 12 |
Dear all,
I have been meshing a simple geometry with ICEM and GAMBIT in order to run some incompressible problems (image attached). I have 2 periodic surfaces. However, dealing with these surfaces has been a nightmare. I have used both programs with different mesh sizes and Boundary conditions with no luck. The closest that I have been is at 8% of difference between surfaces. Also, I have * increased the matchTolerance * increased the writePrecision to 12 * used the command of "Set up Periodicity" in ICEM But nothing!. Does anyone have any suggestion on how to deal with this issue? I think the converted is not recognising the relation between surfaces, but how can I change that? Thanks. |
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September 4, 2013, 06:11 |
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#2 |
Senior Member
Markus Rehm
Join Date: Mar 2009
Location: Erlangen (Germany)
Posts: 184
Rep Power: 17 |
Hi Agustin,
I had a similar problem. In my case it was because of the block vertices which were not exactly at the position of the geometry points. In my case it was a 60° axi symmetric case. I had to put points at the corners of the first cyclic patch and rotate them. Then I forced (snapped) the vertices of the blocks to these rotated points. The ICEM mesh I exported worked well that way. But I think in terms of tolerance it was also around 0.05. Which cyclic boundary condition are you using? Markus |
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September 4, 2013, 13:00 |
Thanks!.
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#3 |
New Member
Agustin
Join Date: Aug 2013
Posts: 4
Rep Power: 12 |
Hi Markus,
Thanks for the advice. I changed the periodic vertices in order to make them easier to spot by the program. Also, remade the geometry to have a coherent periodicity of 40 degrees. Finally, increased the matchTolerance to 0.05, and it's working now!. Thanks a lot. |
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