UDF for heat source on surface instead of the whole cell zone??

benson621 · November 24, 2011, 13:48

i want to demonstrate the water flow inside a porous media under heat on the surface. i have only one cell which is porous. but in the cell zone condition, i can just choose for the source term or fixed values which make the cell zone heat averagely. but i want the heat is come from outside, which the center should remain the initial for quite a long time while the outer part of the cell should be nearly to the certain temperature. i just can't find a option to do this. do i need a UDF to do this? and may i ask how? thank you so much.

benson621 · December 7, 2011, 07:55

push....can anyone help me??

i really want to know how to do it, thank you.

fox000002 · December 7, 2011, 10:11

Why not using Heat Generation Rate boundary condition?

benson621 · December 7, 2011, 10:16

Quote:

Originally Posted by fox000002

Why not using Heat Generation Rate boundary condition?

because i don't know the heat generation rate
i can just assume that the temperature cotton surface is always equal to the temperature of the hot air.

benson621 · December 8, 2011, 12:54

do anyone know please tell me please.

thank you so much!!!

November 24, 2011, 13:48	UDF for heat source on surface instead of the whole cell zone??	#1
benson621 New Member Join Date: Oct 2011 Posts: 14 Rep Power: 16	i want to demonstrate the water flow inside a porous media under heat on the surface. i have only one cell which is porous. but in the cell zone condition, i can just choose for the source term or fixed values which make the cell zone heat averagely. but i want the heat is come from outside, which the center should remain the initial for quite a long time while the outer part of the cell should be nearly to the certain temperature. i just can't find a option to do this. do i need a UDF to do this? and may i ask how? thank you so much.

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December 7, 2011, 07:55		#2
benson621 New Member Join Date: Oct 2011 Posts: 14 Rep Power: 16	push....can anyone help me?? i really want to know how to do it, thank you.

December 7, 2011, 10:11		#3
fox000002 Member Join Date: Apr 2009 Posts: 46 Rep Power: 18	Why not using Heat Generation Rate boundary condition?

December 8, 2011, 12:54		#5
benson621 New Member Join Date: Oct 2011 Posts: 14 Rep Power: 16	do anyone know please tell me please. thank you so much!!!