Heat transfer settings in ANSYS CFX Pre.

saisanthoshm88 · November 6, 2010, 04:08

Can some one tell me the difference between specifying a heat flux from a wall and adding a heat source through a subdomain to the simulation.
I mean when it is required to deal with convective heat transfer should the approach be to define a wall boundary condition with heat flux (or) is it required to define a solid domain accordingly and then a sub domain with in it to add the heat energy. what is the difference indeed.

Best regards,
Santhosh.

ghorrocks · November 6, 2010, 07:14

On the boundary the flux is applied at the wall boundary and for the sub domain it is applied in a volume inside the domain.

Simply choose the approach which most closely matches what is actually happening - is it volumetric heating or surface heating?

November 6, 2010, 04:08	Heat transfer settings in ANSYS CFX Pre.	#1
saisanthoshm88 Senior Member --------- Join Date: Oct 2010 Posts: 303 Rep Power: 18	Can some one tell me the difference between specifying a heat flux from a wall and adding a heat source through a subdomain to the simulation. I mean when it is required to deal with convective heat transfer should the approach be to define a wall boundary condition with heat flux (or) is it required to define a solid domain accordingly and then a sub domain with in it to add the heat energy. what is the difference indeed. Best regards, Santhosh.

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November 6, 2010, 07:14		#2
ghorrocks Super Moderator Glenn Horrocks Join Date: Mar 2009 Location: Sydney, Australia Posts: 17,871 Rep Power: 144	On the boundary the flux is applied at the wall boundary and for the sub domain it is applied in a volume inside the domain. Simply choose the approach which most closely matches what is actually happening - is it volumetric heating or surface heating?