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-   -   QUICK QUESTION: How it comes !!! (http://www.cfd-online.com/Forums/fluent/121775-quick-question-how-comes.html)

meshoxx August 5, 2013 08:22

QUICK QUESTION: How it comes !!!
 
Hi all ,
Something weird was going on fluent. I have been simulating heat exchanger (tube bank) problem. When setting the B.C's I set the temperature of the cylinders to 343.15 but after iterating to some residual when doing surface integral to the cylinder to just check the temperature THE TEMPRATURE OF THE CYLINDERS WAS NOT AS I SET AS A BOUNDARY CONDITION !!!!!

please reply if you know the solution


I thought that maybe there are not enough nodes on the surface of the cylinders but as I increased the nodes the difference still huge (like 25c)

meshoxx August 7, 2013 21:38

Really no one can answer !!

vasava August 8, 2013 01:21

Did your case converge properly? Put some pictures of the mesh and temperature distribution.

sampathevs August 8, 2013 01:30

yes, it might not yet converged properly.!

Check the result after obtaining some convergence.

meshoxx August 9, 2013 07:23

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Hi
I tried to do a sanpshot of all thing. All the residuals are belowe 10-7 and still the specified bounddary condition doesnt match with the computed one

flotus1 August 9, 2013 07:49

Have a look at the definition of the total temperature in fluent.
Then evaluate the static temperature instead.

meshoxx August 9, 2013 15:13

I will do :)
Thank you so much to all who replyed


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