[DesignModeler] A beginner need a help

ashraf88 · January 2, 2013, 08:39

Hi every one,

I am trying to simulate a heat exchanger of a staggered arrangement via CFX, the problem is that I don't know how to determine the thickness of my model.

I would be grateful if you can help me. I am attaching an image for my model to clarify the issue.

Any comments will be appreciated.
Thanks so much.

jrunsten · January 7, 2013, 04:16

If you have symmetry boundary conditions on both sides and one cell across the thickness it shouldn't matter for results, but for convergence I think it is convenient to have a much thinner model than what you are showing.

http://www.cfd-online.com/Wiki/Ansys..._simulation.3F

"For the planar mesh the extrusion should be approximately equal to the smallest element edge length in the model"

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January 7, 2013, 04:16		#2
jrunsten Senior Member Josef Runsten Join Date: Jul 2010 Location: Gothenburg, Sweden Posts: 188 Rep Power: 23	If you have symmetry boundary conditions on both sides and one cell across the thickness it shouldn't matter for results, but for convergence I think it is convenient to have a much thinner model than what you are showing. http://www.cfd-online.com/Wiki/Ansys..._simulation.3F "For the planar mesh the extrusion should be approximately equal to the smallest element edge length in the model"