. Air and water in a cross flow heat exchanger. The fluids do not come

AI Thread Summary
The discussion focuses on performing a cross flow analysis of air and water in a heat exchanger using FLUENT, where the fluids do not mix. The user seeks guidance on assigning fluid properties and boundary conditions in FLUENT after modeling in GAMBIT. Respondents suggest using empirical relations for heat transfer calculations, emphasizing the importance of heat transfer coefficients for accurate results. They also recommend consulting API standards for equations specific to shell and tube heat exchangers. The user acknowledges the advice and plans to utilize empirical relations for their analysis.
sashankhrao
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Hi,

I am trying to do a cross flow analysis in FLUENT. Air and water in a cross flow heat exchanger. The fluids do not come in contact. I have modeled and meshed the geometry in GAMBIT. Could someone pls help me with the steps in FLUENT as to how to assign different fluid properties for different boundary conditions and so on. I need to det the temp. drop of air and water.

Thanks!
 
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You'll probably be better off just using impirical relations to get heat transfer. In CFX at least, in order to get decent heat transfer numbers, you need the heat transfer coefficients.

There are fairly good equations for shell and tube heat exchangers, check the API standards.
 


Hi,

Sorry for the late reply. Thanks a lot for answering my question. I'll take your advice of using impirical relations.

Sashankh
 

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