# Heat Generation Rate

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 October 27, 2012, 14:53 Heat Generation Rate #1 Member   sagila Join Date: May 2012 Posts: 39 Rep Power: 5 Dear All, When I define “Heat Generation Rate (W/m3)” in boundary condition type of wall, and I have fluid cells in one side of the wall, is the defined “Heat Generation Rate” considered for one side of the wall (that I define fluid cells) or for both sides of it? Thanks.

 October 28, 2012, 12:55 #2 Member   sagila Join Date: May 2012 Posts: 39 Rep Power: 5 Dear All, I would appreciate if anyone could help me. Thank you.

October 29, 2012, 15:13
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misagh
Join Date: Apr 2012
Posts: 49
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Quote:
 Originally Posted by sagila Dear All, When I define “Heat Generation Rate (W/m3)” in boundary condition type of wall, and I have fluid cells in one side of the wall, is the defined “Heat Generation Rate” considered for one side of the wall (that I define fluid cells) or for both sides of it? Thanks.
Dear Sagila,
heat generation doesn't happen in a surface it do happens in a volume as it is obvious from its dimenion:w/M^3
consider Q(DOT)=10 WATT that accurs in a tube with Di=10 cm , Do=20cm ,L=1m
here heat generation rate equals:10/v
v=pi/4 (Do^2 - Di^2)*L
so as mentioned before it happens in the mantle of tube and both sides of tube(inside which is in contact with fluid and the outside of tube)allow the heat flux to pass.
good luck

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