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QUICK QUESTION: How it comes !!!

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Old   August 5, 2013, 08:22
Default QUICK QUESTION: How it comes !!!
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Mfm
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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)
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Old   August 7, 2013, 21:38
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Really no one can answer !!
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Old   August 8, 2013, 01:21
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Did your case converge properly? Put some pictures of the mesh and temperature distribution.
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Old   August 8, 2013, 01:30
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EMAVI V SURYA SAMPATH
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yes, it might not yet converged properly.!

Check the result after obtaining some convergence.
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Old   August 9, 2013, 07:23
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Uploaded with ImageShack.us

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
Attached Images
File Type: jpg Capture.jpg (99.0 KB, 0 views)
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Old   August 9, 2013, 07:49
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Have a look at the definition of the total temperature in fluent.
Then evaluate the static temperature instead.
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Old   August 9, 2013, 15:13
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I will do
Thank you so much to all who replyed
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