conjugate heat transfer
 

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

Re: conjugate heat transfer
 

Covered in the tutorials.

Re: conjugate heat transfer
 

Hi,

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

thanks in advance & with regards san

Re: conjugate heat transfer
 

If you have the software, you have the tutorial already.

Re: conjugate heat transfer
 

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.

Re: conjugate heat transfer
 

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

Re: conjugate heat transfer
 

The example's name is in CFX tutorial: Conjugate Heat Transfer...and there are a lot of usefull tutorial files...

Re: conjugate heat transfer
 

Hi,

i will check it.

Thanks & with regards san

Re: conjugate heat transfer
 

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?

Re: conjugate heat transfer
 

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.