CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > Siemens > STAR-CCM+

turbulent dissipation rate

Register Blogs Community New Posts Updated Threads Search

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   October 12, 2009, 18:37
Default turbulent dissipation rate
  #1
New Member
 
Join Date: Jul 2009
Posts: 6
Rep Power: 17
pluto is on a distinguished road
hi guys,

i am modelling a multiphase flow and when i begin my simulation i am getting a floating point error. the problem appears to be the turbulent dissipation rate (tdr) because as the residuals start the tdr graph continues to increase and does not converge. I've increased the tdr and turbulent kinetic rate (tkr) values and i no longer receive a floating point error. Can somebody please help me in choosing a suitable value for these two rates. the multiphase flow is air and water

thanks for the help
pluto is offline   Reply With Quote

Old   October 15, 2009, 18:19
Default
  #2
New Member
 
Join Date: Sep 2009
Posts: 19
Rep Power: 17
emanuele is on a distinguished road
Are you working with dof model or steady?
emanuele is offline   Reply With Quote

Old   October 16, 2009, 09:56
Default
  #3
Senior Member
 
Aroon
Join Date: Apr 2009
Location: Racine WI
Posts: 148
Rep Power: 17
vishyaroon is on a distinguished road
Do you have the "Cell Quality Remediation" activated in your physics? If you have then you may want to check your initialization.
vishyaroon is offline   Reply With Quote

Old   November 11, 2009, 15:41
Default
  #4
New Member
 
Join Date: Jul 2009
Posts: 6
Rep Power: 17
pluto is on a distinguished road
I apologize for the late response. The model is steady. Yes, I have enable cell remediation in the physics model

Thanks for the assistance
pluto is offline   Reply With Quote

Reply


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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
CFX12 rif errors romance CFX 4 October 26, 2009 14:41
Turbulent dissipation rate in UDF John Deas FLUENT 0 February 20, 2009 13:27
Dissipation rate access K. Kevala FLUENT 0 July 14, 2004 12:11
can turbulent dissipation rate be larger than 10e? Thonstad FLUENT 0 April 29, 2004 04:54
calculation of (turbulent) dissipation energy ? max Main CFD Forum 3 August 18, 1999 10:42


All times are GMT -4. The time now is 01:00.