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How to set the fixheatflux boundary condition

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Old   November 8, 2010, 22:27
Question How to set the fixheatflux boundary condition
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Hi all,
I know this topic has been discussed a lot before, but I still don't understand. I am going to set the fixedHeatFlux boundary.As you know, q=-k*Grad(T),where q is heat flux and k is thermal conductivity. Although q is known and the relationship between k and T is known, Grad(T) still cannot get. So the fixGradient boudary is useless for me. In this situation, how can I set the boundary condition?
Thanks a lot in advance.
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