Turbulent Heat Flux Question

deji · May 20, 2013, 13:34

Hello Foamers!!! I am somewhat baffled by some of the results I've acquired in my LES simulation. It is a natural convection turbulent boundary layer flow over a heated vertical plate. Herein lies my question, is it possible to accurately capture <u'u'> and <T'T'>, but overpredict the turbulent heat flux, <u'T'>? That is essentially what my results show; thus, I am assuming mesh resolution may be the issue.These are the results.

Any feedback will be immensely appreciated?

morard · May 21, 2013, 03:18

Hi deji,

discrepancy for <u'T'> is too big so that it seems to me that the problem might be just in the plotting (normalization of data or something like that), check it carefully.

Regards

deji · May 21, 2013, 13:36

Thanks much for the feedback Dejan. I will definitely look into that.

deji · May 21, 2013, 15:52

Problem solved!! It was a normalization problem...Thanks much for the feedback Dejan!

morard · May 22, 2013, 02:18

You're welcome!

s.m.saad jamil · August 1, 2016, 09:27

Dear deji,
How you have calculated the turbulent heat flux.
I am simulating the natural convection case in vertical channel.
Please tell me how you have calculated turbulent heat flux in FLUENT.

regards
saad

August 1, 2016, 09:27	turbulent heat flux	#6
s.m.saad jamil New Member saad Join Date: May 2012 Posts: 6 Rep Power: 14	Dear deji, How you have calculated the turbulent heat flux. I am simulating the natural convection case in vertical channel. Please tell me how you have calculated turbulent heat flux in FLUENT. regards saad

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May 21, 2013, 03:18		#2
morard Member Dejan Morar Join Date: Nov 2010 Posts: 78 Rep Power: 16	Hi deji, discrepancy for <u'T'> is too big so that it seems to me that the problem might be just in the plotting (normalization of data or something like that), check it carefully. Regards

May 21, 2013, 13:36		#3
deji Senior Member n/a Join Date: Sep 2009 Posts: 199 Rep Power: 16	Thanks much for the feedback Dejan. I will definitely look into that.

May 21, 2013, 15:52		#4
deji Senior Member n/a Join Date: Sep 2009 Posts: 199 Rep Power: 16	Problem solved!! It was a normalization problem...Thanks much for the feedback Dejan!

May 22, 2013, 02:18		#5
morard Member Dejan Morar Join Date: Nov 2010 Posts: 78 Rep Power: 16	You're welcome!