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-   -   Stl Model and Model after preprocessor are not the same !!! (http://www.cfd-online.com/Forums/flow-3d/68502-stl-model-model-after-preprocessor-not-same.html)

AttaponC September 22, 2009 11:34

Stl Model and Model after preprocessor are not the same !!!
 
http://img97.imageshack.us/i/model.jpg/
http://img2.imageshack.us/i/preprocessor.jpg/

Hi everyone
I 'm try to learning flow-3D.
I modeled like a flow from weir.
And I found problem.
After I did preprocessor the solid model has been changed.
Somes wall of them disappeared. And I tried to run simulation.
And the result showed that there was no that wall.
Please see picture for more detail.
Could anyone guide me what I have done wrong......

Thank in Advance

ck5285 September 24, 2009 13:05

Hi Attapon
I believe the wall presented here is a thin wall right? so, I suspect your mesh is not fine enough to resolve the solid wall eg: solid object needs a least 2 cells a long the thickness for good meshing. So, you may need to use fix point to ensure you have at least 2 cells along the thickness of thin wall object. Hope this help.

MuxaB September 30, 2009 23:54

Attapon, did you figure it out? Was it poor mesh resolution?


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