Why does negative heat flux come?

abhi007shek · August 6, 2009, 14:08

Hi Guys
I am dealing with a conjugate heat transfer problem. The flow is basically "flow between two parallel plates" and those parallel plates have some thickness. I gave heat flux BC on one of the walls of these plates. But I get negative heat flux in the solid region when it is trying to solve. What could be the problem??

Thnx

Pauli · August 6, 2009, 16:08

Probably nothing is wrong (other than the user not understanding sign conventions).

Negative heat flux typically means the heat flux is in the direction opposite of the direction assumed to be positive when the equations were derived.

August 6, 2009, 14:08	Why does negative heat flux come?	#1
abhi007shek New Member Join Date: Mar 2009 Posts: 1 Rep Power: 0	Hi Guys I am dealing with a conjugate heat transfer problem. The flow is basically "flow between two parallel plates" and those parallel plates have some thickness. I gave heat flux BC on one of the walls of these plates. But I get negative heat flux in the solid region when it is trying to solve. What could be the problem?? Thnx

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Sign of Heat Flux at wall	Kyung	FLUENT	2	February 26, 2016 16:25
Heat Flux Wall Boundary Confusion.	Joee	FLUENT	1	August 21, 2010 12:20
[blockMesh] BlockMesh FOAM warning	gaottino	OpenFOAM Meshing & Mesh Conversion	7	July 19, 2010 14:11
[blockMesh] Axisymmetrical mesh	Rasmus Gjesing (Gjesing)	OpenFOAM Meshing & Mesh Conversion	10	April 2, 2007 14:00
why the value of wall heat flux is negative?	prayskyer	CFX	5	September 29, 2006 07:32

August 6, 2009, 16:08		#2
Pauli Senior Member Pauli Join Date: Mar 2009 Posts: 189 Rep Power: 17	Probably nothing is wrong (other than the user not understanding sign conventions). Negative heat flux typically means the heat flux is in the direction opposite of the direction assumed to be positive when the equations were derived.