CFD Online Discussion Forums

CFD Online Discussion Forums (
-   CFX (
-   -   Mesh stiffness in 1 way FSI (

vmlxb6 February 10, 2011 03:47

Mesh stiffness in 1 way FSI
In default domain we define the mesh stiffness. Does the mesh stiffness interfere with the displacements ?????

Thank you.

ghorrocks February 10, 2011 05:14

It is a weighting factor on the mesh smoothing algorithm. So I guess, yes, it does "interfere with the displacements".

vmlxb6 February 10, 2011 05:15

How should I determine the value of my Stiffness factor ???

stumpy February 15, 2011 10:24

The mesh stiffness doesn't change the motion of the boundaries (unless the boundaries are unspecified, then it can have an indirect effect), so different stiffnesses give the same flow solution. If your mesh quality remains OK then there's no need to change the stiffness. If the mesh folds or the quality becomes poor then a different stiffness may help. For example increasing the mesh stiffness near boundaries produces a stiff boundary layer mesh (i.e. it moves with the boundary rather than getting compressed).

vmlxb6 February 15, 2011 17:17

Thank you.

All times are GMT -4. The time now is 19:45.