Conjugate heat transfer

ali_1364reza · May 30, 2012, 07:15

Hi Friends
I'm a Ph.D. student majoring in mechanical engineering, working on “Unsteady Conjugate Heat Transfer in reacting flow”.
I faced some questions about CFX. I’d be so thankful if you could help me.
1. Does CFX solve this problem (Unsteady Conjugate Heat Transfer in reacting flow)?
2. Which algorithms does CFX use for conjugate heat transfer?

With Kind Regards

ghorrocks · May 30, 2012, 08:28

1. Yes, CFX can solve it.
2. The solid domain is directly coupled to the fluid domain. If the flow is laminar then the temperature is coupled across both domains directly, if turbulent wall functions then coupled through the wall functions.

ali_1364reza · May 30, 2012, 08:39

thank you so much
but I nead to slove a reacting flow
for example when we have a combustion in a combustor, there is a intensive temprature gradient
this issue will be caused bad convergency in couple boundary
what is your idea about it?

ghorrocks · May 30, 2012, 08:42

Yes, that will make convergence more difficult and accuracy a challenge. But CFX has all the models required to make it work, you just need to apply them correctly.

May 30, 2012, 07:15	Conjugate heat transfer	#1
ali_1364reza New Member Alireza Join Date: Mar 2011 Posts: 4 Rep Power: 15	Hi Friends I'm a Ph.D. student majoring in mechanical engineering, working on “Unsteady Conjugate Heat Transfer in reacting flow”. I faced some questions about CFX. I’d be so thankful if you could help me. 1. Does CFX solve this problem (Unsteady Conjugate Heat Transfer in reacting flow)? 2. Which algorithms does CFX use for conjugate heat transfer? With Kind Regards

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May 30, 2012, 08:28		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	1. Yes, CFX can solve it. 2. The solid domain is directly coupled to the fluid domain. If the flow is laminar then the temperature is coupled across both domains directly, if turbulent wall functions then coupled through the wall functions.

May 30, 2012, 08:39		#3
ali_1364reza New Member Alireza Join Date: Mar 2011 Posts: 4 Rep Power: 15	thank you so much but I nead to slove a reacting flow for example when we have a combustion in a combustor, there is a intensive temprature gradient this issue will be caused bad convergency in couple boundary what is your idea about it?

May 30, 2012, 08:42		#4
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,870 Rep Power: 144	Yes, that will make convergence more difficult and accuracy a challenge. But CFX has all the models required to make it work, you just need to apply them correctly.