Cross Flow cooling system involving multiple fluids and a solid domain

ajaymenon · June 16, 2010, 00:09

Hello,

I am trying to perform a conjugate heat transfer analysis of a simple cross flow cooling system consisting of a single pipe carrying hot fluid.This pipe-fluid system is cooled by forced convection by air flowing over the pipe. I have gone through the tutorial on CHT of heating coil , but it contains a single fluid domain and a single solid domain. How can I model a CHT transfer such as the one that I described where 2 fluids seperated by a solid domain is involved?

Do I need to perform a multiphase analysis here, because CFX just allows me to define one fluid model for both fluid domains or is there a way I can specify seperate fluid models for the 2 fluid domains in my problem?

Any help in modelling this problem is appreciated?

Thank You
Ajay

ghorrocks · June 16, 2010, 09:21

This can be done without requiring multiphase. You have to use the "disallow constant domain physics" option or something like that - search the forum for it, there are a few posts on it.

ajaymenon · June 16, 2010, 18:09

Thank You Glenn

aliemadi · March 8, 2012, 04:05

Dear Ajay
I have exactly the same problem in modelling a heating device. have your problem solved?
I searched the forum for "disallow constant domain physics" but nothing exist.
Thanks
Ali

ghorrocks · March 8, 2012, 18:00

http://www.cfd-online.com/Forums/cfx...nt-fluids.html

June 16, 2010, 00:09	Cross Flow cooling system involving multiple fluids and a solid domain	#1
ajaymenon New Member Ajay Menon Join Date: Feb 2010 Location: Dallas Posts: 2 Rep Power: 0	Hello, I am trying to perform a conjugate heat transfer analysis of a simple cross flow cooling system consisting of a single pipe carrying hot fluid.This pipe-fluid system is cooled by forced convection by air flowing over the pipe. I have gone through the tutorial on CHT of heating coil , but it contains a single fluid domain and a single solid domain. How can I model a CHT transfer such as the one that I described where 2 fluids seperated by a solid domain is involved? Do I need to perform a multiphase analysis here, because CFX just allows me to define one fluid model for both fluid domains or is there a way I can specify seperate fluid models for the 2 fluid domains in my problem? Any help in modelling this problem is appreciated? Thank You Ajay

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June 16, 2010, 09:21		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,001 Rep Power: 146	This can be done without requiring multiphase. You have to use the "disallow constant domain physics" option or something like that - search the forum for it, there are a few posts on it.

June 16, 2010, 18:09		#3
ajaymenon New Member Ajay Menon Join Date: Feb 2010 Location: Dallas Posts: 2 Rep Power: 0	Thank You Glenn

March 8, 2012, 04:05		#4
aliemadi New Member Ali Emadi Join Date: Jan 2011 Posts: 18 Rep Power: 16	Dear Ajay I have exactly the same problem in modelling a heating device. have your problem solved? I searched the forum for "disallow constant domain physics" but nothing exist. Thanks Ali

March 8, 2012, 18:00		#5
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 18,001 Rep Power: 146	http://www.cfd-online.com/Forums/cfx...nt-fluids.html