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-   -   Negative element volume & folded mesh in cfx 11.0 (http://www.cfd-online.com/Forums/cfx/24939-negative-element-volume-folded-mesh-cfx-11-0-a.html)

siavash ghassemi December 18, 2007 05:27

Negative element volume & folded mesh in cfx 11.0
 
hello,i am working on a 2way fsi project in cfx11.o.i use cfx method for mesh generation in both solid and fluid models,but it doesn't run completely.error messages are: 1-a negative element volume has been detected. 2-folded mesh occurred. how can i obtain a solution? thanks.

Glenn Horrocks December 18, 2007 17:20

Re: Negative element volume & folded mesh in cfx 1
 
Hi,

Look at where the mesh has folded and either remesh to stop the folding of use the mesh stiffness control to adjust the smoothing to stop the folding.

Glenn Horrocks

siavashghassemi December 28, 2007 14:17

Re: Negative element volume & folded mesh in cfx 1
 
hello, i applied a lot of changes in mesh setting but the error messages displays yet.when i decrease inlet pressure the simulation runs normally because the deformation in solid is very small.if ansys solves only FSI problems with small solid deformations or i should set a suitable mesh setting to see large defornations? thanks, s.ghassemi


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