CFD Online Discussion Forums

CFD Online Discussion Forums (http://www.cfd-online.com/Forums/)
-   CFX (http://www.cfd-online.com/Forums/cfx/)
-   -   FSI (negative volume element) (http://www.cfd-online.com/Forums/cfx/23895-fsi-negative-volume-element.html)

Flying pigs April 23, 2007 05:53

FSI (negative volume element)
 
Hi there

I am currently doing 2 way FSI simulation on the flexible wing, and the deformation of the wing is rather large, which always leads to error in the CFX solver due to negative volume element.

I was wondering, is the re-meshing the only way to solve the problem? Or there is other way I could do? (may be added some mathematical model to prevent the mesh going to negative volume?)

Anyway, thanks for reading my questions.


Johnny April 23, 2007 06:09

Re: FSI (negative volume element)
 
Have you tried smaller timesteps and/or playing around with the mesh stiffness?

Flying pigs April 23, 2007 07:07

Re: FSI (negative volume element)
 
Hi Johnny

I haven't try with the mesh stifness, which I was thinking, it might solve the problem, anyway, I will give a try (because I am just new user to CFX )

anyway, thanks :)


All times are GMT -4. The time now is 14:16.