flux panel

amar · April 12, 2009, 00:44

Hello dear all

I'd like to know what is "net" in the Report---->flux panel refer to?

Thanks a lot

-mAx- · April 14, 2009, 01:10

this is the sum of the fluxes selected

amar · April 14, 2009, 21:31

Dear

Thanks for your reply
Sorry but in fluent's help it is mentioned that the number in the "net" is the sum of all values above but also if you have chosen the mass flow rate it refers to mass flow rate imbalance test and the same if you have chosen the total heat transfer rate it will refer to energy imbalance test, so please do you know what is the maximum limit for "net".

I appropriate your reply
thanks

-mAx- · April 15, 2009, 00:43

What do you mean with limit?

From 6.3 Help:
-------------

The steps for generating the report are as follows:
1. Specify which flux computation you are interested in by selecting Mass Flow Rate, Total Heat Transfer Rate, or Radiation Heat Transfer Rate under Options.
2. In the Boundaries list, choose the boundary zone(s) on which you want to report fluxes.
3. Click on the Compute button. The Results list will display the results of the selected flux computation for each selected boundary zone, and the box below the Results list will show the summation of the individual zone flux results.

amar · April 15, 2009, 06:07

Hello dear

Actually I know these steps and may be I didn't explain well. If you could see in Tutorial Guide pdf file in FLUENT help page 1-26, 1-27, 4-19, 5-23 and other pages. it is mentioned in the last point.
May question is what is the maximum number should appear in the "net", and is there a mathematical solution to specify the imbalance test or I direct take the "net" as the imbalance test.

Thanks for your continuous reply

-mAx- · April 15, 2009, 06:25

ok I see what you mean.
You want to know if there is a limit for the imbalance (0.2%)
In this case, it's up to you, there is no guidelines about it.
The "net" is the imbalance of your computation, and also it will give you an idea of a good convergence (or not)

amar · April 15, 2009, 06:39

Yes you are right, but how to be sure because I'm a master's student and I have to support any thing I mention.
Sorry I'd like to ask you another question. Actually I'm doing a simulation on a portion of heat exchanger and I want to specify the heat transfer coefficient, do you know how, please?

Thanks a lot

-mAx- · April 15, 2009, 07:11

no idea, I am not handling heat problem
post a new thread on the forum
I' pretty sure you will have replies

April 12, 2009, 00:44	flux panel	#1
amar Member amar Join Date: Mar 2009 Posts: 31 Rep Power: 17	Hello dear all I'd like to know what is "net" in the Report---->flux panel refer to? Thanks a lot

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April 14, 2009, 01:10		#2
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	this is the sum of the fluxes selected

April 14, 2009, 21:31		#3
amar Member amar Join Date: Mar 2009 Posts: 31 Rep Power: 17	Dear Thanks for your reply Sorry but in fluent's help it is mentioned that the number in the "net" is the sum of all values above but also if you have chosen the mass flow rate it refers to mass flow rate imbalance test and the same if you have chosen the total heat transfer rate it will refer to energy imbalance test, so please do you know what is the maximum limit for "net". I appropriate your reply thanks

April 15, 2009, 00:43		#4
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	What do you mean with limit? From 6.3 Help: ------------- The steps for generating the report are as follows: 1. Specify which flux computation you are interested in by selecting Mass Flow Rate, Total Heat Transfer Rate, or Radiation Heat Transfer Rate under Options. 2. In the Boundaries list, choose the boundary zone(s) on which you want to report fluxes. 3. Click on the Compute button. The Results list will display the results of the selected flux computation for each selected boundary zone, and the box below the Results list will show the summation of the individual zone flux results.

April 15, 2009, 06:07		#5
amar Member amar Join Date: Mar 2009 Posts: 31 Rep Power: 17	Hello dear Actually I know these steps and may be I didn't explain well. If you could see in Tutorial Guide pdf file in FLUENT help page 1-26, 1-27, 4-19, 5-23 and other pages. it is mentioned in the last point. May question is what is the maximum number should appear in the "net", and is there a mathematical solution to specify the imbalance test or I direct take the "net" as the imbalance test. Thanks for your continuous reply

April 15, 2009, 06:25		#6
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	ok I see what you mean. You want to know if there is a limit for the imbalance (0.2%) In this case, it's up to you, there is no guidelines about it. The "net" is the imbalance of your computation, and also it will give you an idea of a good convergence (or not)

April 15, 2009, 06:39		#7
amar Member amar Join Date: Mar 2009 Posts: 31 Rep Power: 17	Yes you are right, but how to be sure because I'm a master's student and I have to support any thing I mention. Sorry I'd like to ask you another question. Actually I'm doing a simulation on a portion of heat exchanger and I want to specify the heat transfer coefficient, do you know how, please? Thanks a lot

April 15, 2009, 07:11		#8
-mAx- Super Moderator Maxime Perelli Join Date: Mar 2009 Location: Switzerland Posts: 3,297 Rep Power: 41	no idea, I am not handling heat problem post a new thread on the forum I' pretty sure you will have replies