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Boundary heat source with temperature as a dependent variable
Posted Mar 30, 2017, 3:29 p.m. EDT Heat Transfer & Phase Change Version 5.1 2 Replies
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Hi,
I'm try to solve this solid heat transfer case with a boundary heat source. The heat source Q is a function of surface temperature. Can I just use 'boundary heat source' boundary condition with the Qb=f(T) equation?
Will this result in non-linearity because of solution dependency? If so, what is the right way to do it?
Thank you very much.
I'm try to solve this solid heat transfer case with a boundary heat source. The heat source Q is a function of surface temperature. Can I just use 'boundary heat source' boundary condition with the Qb=f(T) equation?
Will this result in non-linearity because of solution dependency? If so, what is the right way to do it?
Thank you very much.
2 Replies Last Post Apr 2, 2017, 3:09 p.m. EDT
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Posted:
8 years ago
Fei
It should not be a problem. I have used this method to impose a boundary heat sink at an evaporating interface (Qb=f(T)) and it gave me a good result which matched the temperatures that I'd measured by a thermocouple in the Lab. Keep in mind that you must set a good initial value for the temperature since it uses the initial temperature to start calculating Qb.
My suggestion is that you design a 1D model for which you already know the analytical solution (Somthing like heat transfer through a wall with convective heat transfer at one side and known temperature at the other side). Then solve it numerically with Comsol and compare the results.
Amin,
It should not be a problem. I have used this method to impose a boundary heat sink at an evaporating interface (Qb=f(T)) and it gave me a good result which matched the temperatures that I'd measured by a thermocouple in the Lab. Keep in mind that you must set a good initial value for the temperature since it uses the initial temperature to start calculating Qb.
My suggestion is that you design a 1D model for which you already know the analytical solution (Somthing like heat transfer through a wall with convective heat transfer at one side and known temperature at the other side). Then solve it numerically with Comsol and compare the results.
Amin,
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Posted:
8 years ago
Amin,
Thank you so much!
Fei
Thank you so much!
Fei