turbulent viscosity limited to viscosity ratio of?

mechfloeng · April 15, 2009, 17:10

I'm modeling two-phase mixture, I got error message of:

turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 226857 cells....

Can I get help to solve it?

Thanks

doki · April 16, 2009, 02:19

that is mainly because of the turbulence model you use.
set the appropriate model, and also better approximation of the turbulence parameters in inlet/outlet boundary conditions.

mbgm9mm5 · April 27, 2013, 07:09

Hello

I have been also trying to model the flow over rib roughened passages using a realisable k epsilon model.

I am modelling the flow using periodic boundary conditions as i am modelling a flow which is already fully developed.

what should i do in order to specify my inlet turbulent parameters carefully?
I have used intensity and hydraulic diameter of the duct.

any body's help is highly appreciated.

Far · April 27, 2013, 09:53

is it affecting your solution convergence...

Can you show us pics of mesh please?

Please also post some pics of residuals...

itsme_kit · February 6, 2014, 13:45

Quote:

Originally Posted by Far

is it affecting your solution convergence...

Can you show us pics of mesh please?

Please also post some pics of residuals...

Hi

I got this problem too

However, my convergence seems to be fine

Only the turbulent viscosity is the problem I faced

If velocity is not my interest of research, could I just leave it without further fix?

Cause I only care about temperature field

Hopefully you can help me a little

Thanks

April 15, 2009, 17:10	turbulent viscosity limited to viscosity ratio of?	#1
mechfloeng New Member Howard Join Date: Mar 2009 Posts: 5 Rep Power: 10	I'm modeling two-phase mixture, I got error message of: turbulent viscosity limited to viscosity ratio of 1.000000e+005 in 226857 cells.... Can I get help to solve it? Thanks

April 16, 2009, 02:19		#2
doki Member Join Date: Apr 2009 Posts: 41 Rep Power: 10	that is mainly because of the turbulence model you use. set the appropriate model, and also better approximation of the turbulence parameters in inlet/outlet boundary conditions. Hayder Mohammed likes this.

April 27, 2013, 07:09	Madhur Motwani	#3
mbgm9mm5 New Member Madhur Join Date: Apr 2013 Location: Manchester United Kingdom Posts: 1 Rep Power: 0	Hello I have been also trying to model the flow over rib roughened passages using a realisable k epsilon model. I am modelling the flow using periodic boundary conditions as i am modelling a flow which is already fully developed. what should i do in order to specify my inlet turbulent parameters carefully? I have used intensity and hydraulic diameter of the duct. any body's help is highly appreciated.

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
"turbulent viscosity limited to viscosity ratio"	olivier	FLUENT	11	October 10, 2015 05:49
turbulent viscosity limited to viscosity ratio	Elizabeth	FLUENT	13	December 16, 2014 09:57
Turbulent viscosity Limited to viscosity ratio	Adrian	FLUENT	12	September 21, 2011 04:22
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

April 27, 2013, 09:53		#4
Far Super Moderator Sijal Join Date: Mar 2009 Location: Islamabad Posts: 4,331 Blog Entries: 6 Rep Power: 45	is it affecting your solution convergence... Can you show us pics of mesh please? Please also post some pics of residuals...