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heat source on surface ??

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Old   November 24, 2011, 13:46
Default heat source on surface ??
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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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