kqRWallFunction

immortality · December 28, 2012, 05:14

hi
I want to write kqRWallFunction manually in openfoam.does anybody know a good paper about the formula of it?

Lieven · December 28, 2012, 06:36

Hi Ehsan,

kqRWallFunction is basically equal to zeroGradient, at least that's how it is implemented in OF. Why would you want to implement the function yourself if it is already available?

Kind regards,

L

immortality · December 28, 2012, 08:24

hi dear lieven
I want to model a square tube with a small inlet that is 3mm.i calculated k and omega from the formula in this site.but they seems very high due to highvelocity and small length scale.for instance omega is about 50000.is it correct?
I thought may be i can calculate and obtain better values.
Another doubt is that i dont know what folders need for kOmegaSST in 0-folder?there are very folders like epsilon,R,nutilda,... What folders should be there?
Thank you very much.

danvica · December 28, 2012, 09:04

Hi,
Maybe this can be usefull: http://www.box.com/s/5f45b9c6a8cda47a9d62

It's far from complete but can be a starting point.

Spidermohaa · June 5, 2013, 09:41

Hi,
nice document by the way! May i ask you, why do you use the omega equation for fluent? Thought you calculate in OpenFOAM?

immortality · June 6, 2013, 01:16

what do you mean by omega equation in fluent and openfoam?

immortality · June 6, 2013, 01:24

hi Daniele
Maybe too late but the link doesn't work for me in here.
Please send another one if possible.

wyldckat · June 9, 2013, 07:33

FYI: I've emailed just now the document to Ehsan.

December 28, 2012, 05:14	kqRWallFunction	#1
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	hi I want to write kqRWallFunction manually in openfoam.does anybody know a good paper about the formula of it?

December 28, 2012, 09:04		#4
danvica Senior Member Daniele Vicario Join Date: Mar 2009 Location: Novara, Italy Posts: 142 Rep Power: 17	Hi, Maybe this can be usefull: http://www.box.com/s/5f45b9c6a8cda47a9d62 It's far from complete but can be a starting point. JR22 likes this. __________________ Daniele Vicario blueCFD2.1 - Windows 7

June 5, 2013, 09:41	omega equation?	#5
Spidermohaa New Member H.Martens Join Date: Feb 2013 Posts: 2 Rep Power: 0	Hi, nice document by the way! May i ask you, why do you use the omega equation for fluent? Thought you calculate in OpenFOAM?

June 6, 2013, 01:16		#6
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	what do you mean by omega equation in fluent and openfoam? __________________ 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.

June 6, 2013, 01:24		#7
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	hi Daniele Maybe too late but the link doesn't work for me in here. Please send another one if possible. __________________ 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.

December 28, 2012, 06:36		#2
Lieven Senior Member Lieven Join Date: Dec 2011 Location: Leuven, Belgium Posts: 299 Rep Power: 22	Hi Ehsan, kqRWallFunction is basically equal to zeroGradient, at least that's how it is implemented in OF. Why would you want to implement the function yourself if it is already available? Kind regards, L

December 28, 2012, 08:24		#3
immortality Senior Member Ehsan Join Date: Oct 2012 Location: Iran Posts: 2,208 Rep Power: 26	hi dear lieven I want to model a square tube with a small inlet that is 3mm.i calculated k and omega from the formula in this site.but they seems very high due to highvelocity and small length scale.for instance omega is about 50000.is it correct? I thought may be i can calculate and obtain better values. Another doubt is that i dont know what folders need for kOmegaSST in 0-folder?there are very folders like epsilon,R,nutilda,... What folders should be there? Thank you very much.

June 9, 2013, 07:33		#8
wyldckat Retired Super Moderator Bruno Santos Join Date: Mar 2009 Location: Lisbon, Portugal Posts: 10,975 Blog Entries: 45 Rep Power: 128	FYI: I've emailed just now the document to Ehsan.

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