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October 3, 2012, 01:54 |
dymanic mesh does not work!!!
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#1 |
New Member
chiwonkim
Join Date: Sep 2012
Posts: 4
Rep Power: 13 |
hello,
i have strugle with dynamic mesh problem. i need to analyze the oscillating plate in a speaker. To do this, I used dynamic mesh with 'DEFINE_GRID_MOTION' udf. The motion works well, but mesh problem occurs. Although layering (split factor = 0.4, collapse factor = 0.2) option was activated the mesh did not created or destroied, just stretching. how can i solve this situation? i captured my problem and attatched it. my dynamic mesh zone setting follows 1. air : rigid body (zero velocity CG motion) <- i doubt this setting 2. right boudnary(oscillating) : udf('DEFINE_GRID_MOTION' ) please, allow to know me. thank you |
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October 3, 2012, 06:30 |
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#2 |
Senior Member
Vaze
Join Date: Jun 2009
Posts: 172
Rep Power: 16 |
Hi
Can you specify the face significance - how does it behave and move. First of all create block mesh to use layering option. If the motion is like piston-cylinder then specify top and/or bottom face as deform. Also specify UDF to right face. This should work. No need to define any condition for air domain. Best wishes Mvee |
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October 6, 2012, 09:29 |
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#3 |
Member
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hi mate
recheck the dimensions. for example if cell dimension near moving wall is 1cm*1cm, you should adjust "Cell Height" value in meshing options to 1cm. Last edited by sadjad.s; October 6, 2012 at 12:18. |
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