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

turbulent viscosity limited to viscosity ratio

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

Reply
 
LinkBack Thread Tools Display Modes
Old   April 30, 2004, 02:26
Default turbulent viscosity limited to viscosity ratio
  #1
mukkarum
Guest
 
Posts: n/a
Hi

My solution is going to converge but after each iteration I am getting messege that " turbulent viscosity limited to viscosity ratio 1.000000e+05 on x cells". I am using realizable k-epselon model with standard wall function.

Anyone please help me to get rid this problem.

Thanks

Mukkarum
  Reply With Quote

Old   April 30, 2004, 04:26
Default Re: turbulent viscosity limited to viscosity ratio
  #2
ap
Guest
 
Posts: n/a
This problem usually happens if you have a too coarse grid somewhere in your domain. Plot a contour of the viscosity ration and try to refine the grid there.

Look for other messages on this subject too, there are a lot of questions and answers in this forum.

Hi

ap
  Reply With Quote

Old   May 7, 2004, 02:33
Default Re: turbulent viscosity limited to viscosity ratio
  #3
Pravin Naphade
Guest
 
Posts: n/a
In fluent u just goto

SOLVE.....CONTROLS.....LIMITS .. in limits increase the value of Max. turbulent viscosity ratio to 1.0e10+07... ..it is just the limit...it will not affect ur final solution.....afterward u will not get the mentioned message and u will get faster convergence..CERTAINLY ..try once best luck!
  Reply With Quote

Old   May 11, 2004, 04:05
Default Re: turbulent viscosity limited to viscosity ratio
  #4
ap
Guest
 
Posts: n/a
I don't agree. The limit on turbulent viscosity ratio has been introduced to obtain a stable numerical solution, but it's not necessarily correct.

FLUENT sets the limit using a value which is acceptable in many cases, but if the limitation takes place it could affect the solution.

Hi

ap
  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
turbulent viscosity limited to viscosity ratio of 1.000000e+05 in 511831 cells ZQWY FLUENT 13 June 11, 2015 19:11
hel (turbulent viscosity ratio limited) for supersonic combustion problem omar.2002bh FLUENT 2 September 5, 2012 11:04
Turbulent viscosity limited to viscosity ratio of 1.0000000e+5 eespi002 FLUENT 3 June 30, 2009 13:24
Turbulent viscosity limited to viscosity ratio... Cyril FLUENT 8 February 7, 2006 21:34
Problem of Turbulent Viscosity Ratio Limited David Yang FLUENT 3 June 3, 2002 06:13


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