# how to apply heat flux at fluid solid interface

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 April 16, 2012, 22:58 how to apply heat flux at fluid solid interface #1 New Member   Mustard Join Date: Apr 2012 Posts: 6 Rep Power: 7 hello,everyone,i am doing a heat transfer simulating, a heat flux is regarded as heat source,but its location is at the interface of air and steel,how can i apply it correctly?i used to apply it at the boundary of solid wall(steel),but the result seems to be wrong beacause there is no heat flux toward the air.

 April 17, 2012, 01:57 #2 Super Moderator   Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 14,202 Rep Power: 110 Make the steel/air boundary an interface, and apply a heat flux to the air side of the interface.

 April 17, 2012, 10:23 #3 Senior Member   Join Date: Apr 2009 Posts: 532 Rep Power: 14 ... as a boundary source term on the Sources tab for the interface boundary condition.

 April 17, 2012, 21:01 #4 New Member   Mustard Join Date: Apr 2012 Posts: 6 Rep Power: 7 I've applied a heat flux to either the air side or the steel side of the interface,but both results gave high temperature that were obviously incorrect according the my experiment.

April 17, 2012, 21:12
#5
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Mustard
Join Date: Apr 2012
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Quote:
 Originally Posted by stumpy ... as a boundary source term on the Sources tab for the interface boundary condition.
I made the heat flux as boundary source in the simulation,and the result temperature met the experiment data well,but the heat flux calculated by the function calculator(with areaInt) in CFx-Post was far more less than the value I gave in the boundary source,I am very confused about this,could you please explain it?I am new to heat transfer analysis and looking forward to your kind help.

 April 18, 2012, 05:04 #6 New Member   唐磊 Join Date: Apr 2012 Location: China Posts: 8 Rep Power: 0 hi i wonder why the heat flux must be at the interface of air and steel? and do you mean that you are going to make the heat flux toward both the air and the steal?

April 18, 2012, 05:22
#7
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Mustard
Join Date: Apr 2012
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Quote:
 Originally Posted by tanglei hi i wonder why the heat flux must be at the interface of air and steel? and do you mean that you are going to make the heat flux toward both the air and the steal?
hi,tanglei
In my experiment,I make a band that generating heat stuck to the interface steel/air interface,could you tell me how to apply this heat load to the model?I've done the simulation many times without any reasonable result.

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