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

FSI: change material parameters before restart

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

Reply
 
LinkBack Thread Tools Display Modes
Old   September 29, 2010, 09:31
Default FSI: change material parameters before restart
  #1
Senior Member
 
Lance
Join Date: Mar 2009
Posts: 539
Rep Power: 11
Lance is on a distinguished road
I made a restart on my FSI simulation and at the same time changed the Youngs modulus and stiffness of the solid domain (just edited the .mf file and added the new MP,DENS and MP,EX commands).
However, I got a warning that it is a "non-standard behaviour" to change material parameters between load steps. Is there a "standard behaviour" to do this, or arent you supposed to make a restart with new material parameters?
Lance is offline   Reply With Quote

Old   September 30, 2010, 08:32
Default
  #2
Senior Member
 
Join Date: Apr 2009
Posts: 516
Rep Power: 12
stumpy is on a distinguished road
I'm guessing that some of the transient terms may not be accurate for the first timestep when changing material properties (this really is just a guess). I think support would have to answer that - or is there an ANSYS FEA forum somewhere? Maybe we should add one here and rename the site to CAE Online :-)
stumpy is offline   Reply With Quote

Old   September 30, 2010, 08:38
Default
  #3
Senior Member
 
Lance
Join Date: Mar 2009
Posts: 539
Rep Power: 11
Lance is on a distinguished road
I've been in contact with the support but so far no answer. Anyway, the results seem reasonable, so I guess it works. The warning message looks as follow:
*** WARNING *** CP = 53.720 TIME= 16:50:06
Changing material properties (MP commands) between load steps is a
non-standard use of the program


As long as it's just a warning and the program accepts the new material, Im fine with it.

Yeah, maybe a new forum, or at least a FSI subforum would be great :-)
Lance 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
the material parameters depending on temperature Jason CFX 4 December 22, 2006 20:54
Two-Phase Buoyant Flow Issue Miguel Baritto CFX 4 August 31, 2006 12:02
About create new material jasonchang CFX 3 May 18, 2006 21:07
how to change the material properties Marco CFX 7 September 22, 2005 18:53
Paraffin Phase Change Material Sandra CFX 1 April 27, 2005 00:49


All times are GMT -4. The time now is 11:31.