CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > CFX

Mesh stiffness in 1 way FSI

Register Blogs Members List Search Today's Posts Mark Forums Read

Reply
 
LinkBack Thread Tools Display Modes
Old   February 10, 2011, 03:47
Default Mesh stiffness in 1 way FSI
  #1
Senior Member
 
Ugly Kid Joe
Join Date: Aug 2010
Posts: 193
Rep Power: 7
vmlxb6 is on a distinguished road
In default domain we define the mesh stiffness. Does the mesh stiffness interfere with the displacements ?????

Thank you.
vmlxb6 is offline   Reply With Quote

Old   February 10, 2011, 05:14
Default
  #2
Super Moderator
 
Glenn Horrocks
Join Date: Mar 2009
Location: Sydney, Australia
Posts: 10,832
Rep Power: 85
ghorrocks has a spectacular aura aboutghorrocks has a spectacular aura aboutghorrocks has a spectacular aura about
It is a weighting factor on the mesh smoothing algorithm. So I guess, yes, it does "interfere with the displacements".
ghorrocks is offline   Reply With Quote

Old   February 10, 2011, 05:15
Default
  #3
Senior Member
 
Ugly Kid Joe
Join Date: Aug 2010
Posts: 193
Rep Power: 7
vmlxb6 is on a distinguished road
How should I determine the value of my Stiffness factor ???
vmlxb6 is offline   Reply With Quote

Old   February 15, 2011, 10:24
Default
  #4
Senior Member
 
Join Date: Apr 2009
Posts: 516
Rep Power: 12
stumpy is on a distinguished road
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).
stumpy is offline   Reply With Quote

Old   February 15, 2011, 17:17
Default
  #5
Senior Member
 
Ugly Kid Joe
Join Date: Aug 2010
Posts: 193
Rep Power: 7
vmlxb6 is on a distinguished road
Thank you.
vmlxb6 is offline   Reply With Quote

Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
[ICEM] Negative volume error in hybrid mesh siw ANSYS Meshing & Geometry 4 September 3, 2014 05:25
external flow with snappyHexMesh chelvistero OpenFOAM 11 January 15, 2010 20:43
Convergence moving mesh lr103476 OpenFOAM Running, Solving & CFD 30 November 19, 2007 15:09
Mesh Stiffness Option for Mesh Deformation Ste_Lakey CFX 3 January 19, 2006 17:33
How to control Minximum mesh space? hung FLUENT 7 April 18, 2005 09:38


All times are GMT -4. The time now is 09:10.