whats wrong with k/epsilon/omega when they are bounded variables?

immortality · June 3, 2013, 16:04

why turbulent variables become "bounded variables"?
how can set the bounded value in OF?
what may be the causes and how can overcome this issue?

wyldckat · June 9, 2013, 08:14

Hi Ehsan,

Not much information to work with here...

Just to start:

"bounded" in what sense?
What sort of simulation are we dealing with here?
What did you expect to see?

Best regards,
Bruno

immortality · June 9, 2013, 09:08

Hi Bruno
as it can be seen omega was bounded in the figure.
now it seems that it has resolved on omega as I used a constant length scale for it as you mentioned in another thread.
althogh sometimes k is reported that is bounded but since when I changed its scheme to:

Code:

grad(k) cellMDLimited Gauss linear 1;

this (seems to be like an error) doen't show anymore.

June 9, 2013, 08:14		#2
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	Hi Ehsan, Not much information to work with here... Just to start: "bounded" in what sense? What sort of simulation are we dealing with here? What did you expect to see? Best regards, Bruno __________________ OpenFOAM: FAQ \| Getting started Forum: How to get help, to post code/output and forum guide Read this before sending me PM

June 9, 2013, 09:08		#3
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	Hi Bruno as it can be seen omega was bounded in the figure. now it seems that it has resolved on omega as I used a constant length scale for it as you mentioned in another thread. althogh sometimes k is reported that is bounded but since when I changed its scheme to: Code: grad(k) cellMDLimited Gauss linear 1; this (seems to be like an error) doen't show anymore. __________________ Injustice Anywhere is a Threat for Justice Everywhere.Martin Luther King. To Be or Not To Be,Thats the Question! The Only Stupid Question Is the One that Goes Unasked.

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