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Old   March 3, 2011, 04:40
Default a mesh motion question
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John
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Dear all,

I am working on a fsi case. The fluid model can work well before mesh motion is turned on. But if I used mesh motion, even without fsi, it got overflow quickly. Even if I use the result of static mesh case as the initial condition of mesh motion case, it still can not work.

Please help me if anyone know how to solve this problem. Thank you so much!

John
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Old   March 3, 2011, 18:45
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Glenn Horrocks
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Some details of what you are doing might be useful......
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Old   March 3, 2011, 22:34
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Some details of what you are doing might be useful......
There are two domains in my fluid model: water and porous. I used mesh motion in water domain. The problem is, even no fsi, just the fluid model itself, it gets overflow all the time. In the output file, all the mesh deformations are 0, which means the mesh is exactly the same with static mesh case.
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Old   March 6, 2011, 17:59
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So you are saying that you turn mesh motion off and it converges but you turn mesh motion on, but specify zero displacement it diverges?
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Old   March 15, 2011, 22:24
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So you are saying that you turn mesh motion off and it converges but you turn mesh motion on, but specify zero displacement it diverges?
Yes. It's so strange.
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Old   March 16, 2011, 11:54
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Make your water slightly compressible.
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