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Old   August 31, 2006, 01:20
Default conjugate heat transfer
  #1
san
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Hi,

i want to solve a problem on conjugate heat transfer (i.e, problem which concentrates both on convection & conduction).

The problem is that of a heat Exchanger one.

cold fluid ( water ) will be flowing through inside the pipe & hot air will be passing over this pipe.

know i want to know the wall temp. of the pipe ( for both inside and outside surfaces of pipe), heat transfer co-efficient and pressure drop.

how to set the problem in CFX.

Thanks in advance for the help provided.

bye san
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Old   August 31, 2006, 10:06
Default Re: conjugate heat transfer
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Joe
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Covered in the tutorials.
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Old   September 7, 2006, 03:00
Default Re: conjugate heat transfer
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san
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Hi,

Can you forward that tutorial to my id rsan_2001@rediffmail.com

thanks in advance & with regards san
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Old   September 7, 2006, 09:23
Default Re: conjugate heat transfer
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Robin
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If you have the software, you have the tutorial already.
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Old   September 9, 2006, 05:07
Default Re: conjugate heat transfer
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fea user
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Import the geometry from 3D CAD to ANSYS Workbench's DesignModeler. The most important thing is that you have to create multibody part from your assembly. It is done with DesignModeler Tools menu-->From new part. After this you go ANSYS CFX mesher in workbench, and here the mesher will create composite region walls (that means two contact walls on a boundary will join [combine] in one wall). thus the CFX will automatically create this joined wall condition, this will the conjugate heat transfer condition on the wall.

Once more: the main thing is modelling multibodies CAD modell (in your CAD system, or Design modeler), and it will create the appropriate wall model to conjugate heat transfer.

I hope it is usefull.
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Old   September 9, 2006, 08:33
Default Re: conjugate heat transfer
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san
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Thanks guys,

but if you have any papers/tutorials which covers this concept, please forward the material. This will be very helpfull to me.

If any help file already exists in CFX as an example , give me the name of the file.

Thanks & with regards san
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Old   September 11, 2006, 05:26
Default Re: conjugate heat transfer
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fea user
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The example's name is in CFX tutorial: Conjugate Heat Transfer...and there are a lot of usefull tutorial files...
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Old   September 12, 2006, 10:44
Default Re: conjugate heat transfer
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san
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Hi,

i will check it.

Thanks & with regards san

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Old   September 14, 2006, 05:43
Default Re: conjugate heat transfer
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him
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Hallo San! Did you find tutorial file for your problem? I have to solve a similar problem,but effectively there is no tutorial in which two domains with two different fluids are present! Is it possible set 3 domains: 1 fluid (water), 1 solid and 1 fluid (air)? If yes,how I can do it?
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Old   September 15, 2006, 00:45
Default Re: conjugate heat transfer
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Resh
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Hi I am solving a conjugate heat transfer problem with three domain. The air domain is sandwiched between two copper domain. I have given Heat flux at one of the surface and fixed temperature at the other surface. The air property I have defined at bulk mean temperature which i have calculated theoretically. The analysis is converging but i am not getting the desired temperature at the surface where i have defined heat flux. Can u suggest me.
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