How to apply heat flux condition

January 7, 2003, 19:47

Hi, guys: Could you please help me to apply the heat flux boundary condtion at wall surface. In my case, the known boundary conditions is heat flux, given by: heat flux=heat transfer co. *(Averaged fluid temperature - constant) in which heat transfer co. is constant, but the average fluid temperature varies at different locations in the simulation domain. Thank you very much!

January 7, 2003, 23:05

you can apply the heat flux by boundary condition ,and you can get the bulk temperature [maybe the Averaged fluid temperature ]using Fluent.

January 8, 2003, 11:16

Zhang:

Thank you very much!

Did you suggest me to use UDF to get the bulk temperature? Becuase in my problem, the heat flux is a function of bulk temperature. In UDF, the heat flux is applied on wall surface, which could be defined by Macro DEFINE_PROFILE(). And the temperature can be accessed by DEFINE_PROPERTY(). Now the difficulty is: (1)How to load PROPERTY from PROFILE; (2)The Macro PROFILE()should be update in every iteration. How to make it work? If possible, please give me more advice?

January 7, 2003, 19:47	How to apply heat flux condition	#1
L. Zhu Guest Posts: n/a	Hi, guys: Could you please help me to apply the heat flux boundary condtion at wall surface. In my case, the known boundary conditions is heat flux, given by: heat flux=heat transfer co. *(Averaged fluid temperature - constant) in which heat transfer co. is constant, but the average fluid temperature varies at different locations in the simulation domain. Thank you very much!

January 7, 2003, 23:05	Re: How to apply heat flux condition	#2
zhhuang Guest Posts: n/a	you can apply the heat flux by boundary condition ,and you can get the bulk temperature [maybe the Averaged fluid temperature ]using Fluent.

January 8, 2003, 11:16	Re: How to apply heat flux condition	#3
L. Zhu Guest Posts: n/a	Zhang: Thank you very much! Did you suggest me to use UDF to get the bulk temperature? Becuase in my problem, the heat flux is a function of bulk temperature. In UDF, the heat flux is applied on wall surface, which could be defined by Macro DEFINE_PROFILE(). And the temperature can be accessed by DEFINE_PROPERTY(). Now the difficulty is: (1)How to load PROPERTY from PROFILE; (2)The Macro PROFILE()should be update in every iteration. How to make it work? If possible, please give me more advice?

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