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-   -   3D dynamic mesh negative volume,help me (http://www.cfd-online.com/Forums/fluent/82106-3d-dynamic-mesh-negative-volume-help-me.html)

jdqcgl November 17, 2010 04:45

3D dynamic mesh negative volume,help me
 
hi,all.I am trying to move a face in a 3d model and i keep getting negative volume when i run the mesh motion after several steps.I used smoothing and remeshing,and the parameters are gived by refering to mesh scale info.I have reduced the time step and still it didn't work.I also changed the remeshing parameters but no go.I find the grids which are near the moving wall didn't remeshing,the grids deform until negetive volume is found.what should I do?I have troubled with this problem sevral days,i need help.The cross-section profile of the 3d model after deformation is given.http://photo.163.com/gy8412845/big/#...&id=6568347351

JohannVV November 17, 2010 05:49

hi, may be i can help you. but first could you show me your model ant the dynamic mesh settings for all faces.

jdqcgl November 17, 2010 06:32

Hi,JohannVV,thank you for your reply.Could you give me your e-mail,I will send a message to you.Because I don't known how to put the model on the internet.My email is gy8412845@163.com .QUOTE=JohannVV;283732]hi, may be i can help you. but first could you show me your model ant the dynamic mesh settings for all faces.[/QUOTE]

JohannVV November 17, 2010 10:55

hi I do not want put my e-mail adress to the internet. you can make some pistures and attach them to a post.

jdqcgl November 18, 2010 01:51

Quote:

Originally Posted by JohannVV (Post 283787)
hi I do not want put my e-mail adress to the internet. you can make some pistures and attach them to a post.

hi,I have inserted a picture on the internet,but I don't know why I can't see it.Maybe you can send a email to me ,then I will send the model which include document of mesh and cas.Trust me,I will not give your email to others and I willnot disturb you.Thank you very much,my email is gy8412845@163.com ,send a email to me.This is address of a cross-section picture of my model after deform .http://photo.163.com/gy8412845/big/#...&id=6568347351


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