[Ice man]

I was simulating finned tube heat exchanger shown in figure below.



constant temperature boundary condition used in the inner surface of tube. I'll use this relation to calculate (h), [q=h*A*(Tw-Tref)]
How to find heat flux (q)
thanks

[Ice man]

Is there another method please ?

[pakk]

Yes there is another way. You now do a volume integral, but it is better to do a surface integral, see number 2 in your plot.

[Ice man]

I know that, is there another method except Report> > volume or surface > wall flux >

[pakk]

You can write a UDF (define_on_demand) to calculate the heat flux.
You can output the results to ensight case gold, and use Paraview to calculate the heat flux.
You can save the result in ASCII format, put all in Excel and calculate it.

How many more ways do you want? Why are you asking for more ways to do the same?

[Ice man]

because I've got unbelievable results .

[pakk]

So you were hoping that a different method to calculate the same quantity would give different results? And after that you were planning to choose the result that would suit you best?

If I were you, I would investigate why your method gave an unexpected result.

[Ice man]

Mr. pakk
If you have a time come in ,please !
http://www.cfd-online.com/Forums/flu...tml#post522993

[wpdeng]

Originally Posted by Ice man

I know that, is there another method except Report> > volume or surface > wall flux >

what is the function of xyplot-wall flux-total surface heat flux?
if i want to get the heat flux along the line of walls, is this way right?