CFD Online Logo CFD Online URL
www.cfd-online.com
[Sponsors]
Home > Forums > Software User Forums > ANSYS > FLUENT

About Turbulent Viscosity Ratio Limit...

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

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old   August 2, 2008, 04:18
Default About Turbulent Viscosity Ratio Limit...
  #1
Fabio
Guest
 
Posts: n/a
Hi all, i have raised this limit in my case from 1e+5 to 1e+6 due to the problem reported during iteration about the turbulent viscosity limited by the viscosity ratio in some cells. But one question raise in my head, how this change would affect my results? I know that i should also adapt the grid, but i got memory limit so i can't go further with refinement.

Thanks in advance for your help.

  Reply With Quote

Old   August 7, 2008, 16:40
Default Re: About Turbulent Viscosity Ratio Limit...
  #2
Fabio
Guest
 
Posts: n/a
After a more carefull reading of many posts on the argument, i think that the raise of the viscosity limit ratio brings to me a too diffusive solution even residuals and fluxes reports are ok. The strange thing is that i get the warning for meshes above 1e+6 cells. So the thing should be connected with a too fine mesh for the uniform turbulence boundary condition that i set Turbulence Intensity 4.2% and Lenght 0.0039 from my infput data? I don't think is the skewness because it good from examination in Gambit.

Thank for any answer.
  Reply With Quote

Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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 Off
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
turbulent viscosity limited to viscosity ratio of Hua FLUENT 7 September 27, 2019 07:42
Turbulent viscosity Limited to viscosity ratio Adrian FLUENT 12 September 21, 2011 05:22
Turbulent viscousity ratio limit rawin FLUENT 3 May 27, 2008 13:22
Question about eddy viscosity ratio limit Piti CFX 2 January 17, 2008 17:49
Turbulent viscosity limited to viscosity ratio... Cyril FLUENT 8 February 7, 2006 21:34


All times are GMT -4. The time now is 06:51.