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non-positive volume in in-cylinder 3D

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Old   March 15, 2006, 11:14
Default non-positive volume in in-cylinder 3D
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sachin
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i am doing cylinder-piston arrangement in 3D. for that i m using dymnamic mesh and in-cylinder as dynamic mesh parameters. but if i give mesh motion then for first 12-15 time steps, it is showing motion and after that it is showing non-positive volume and no further mesh motion. i tried more fine mesh, even then same problem. please help me to sort it out.
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