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Heat Transfer in air
Posted 15 mars 2014, 14:51 UTC−4 Heat Transfer & Phase Change Version 4.2 1 Reply
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Hi all
I used comsol 42 from two years ago to calculate some quantities in Fluid Flow.
Now I would like obtain the curve T = T(t) of a material in air, where T is the temperature (K) of the material and t the time (s) for a metallic cylinder made of silver : L(length) = 50 cm and R(radius) = 10 cm embedded in an infinite medium made of air. The initial temperature of the cylinder is 60 K and the temperature of the exterior air media is 20 K. I consider only the radiative losses.
Unfortunately, I feel that the solution of this problem can not be solved with comsol.
I am very surprised that no indication is given in the guides for a such classical problem !
Could you give me a model to help me to solve this problem ? Any helps to configure the GUI with the Heat Transfer module ?
Thank you
I used comsol 42 from two years ago to calculate some quantities in Fluid Flow.
Now I would like obtain the curve T = T(t) of a material in air, where T is the temperature (K) of the material and t the time (s) for a metallic cylinder made of silver : L(length) = 50 cm and R(radius) = 10 cm embedded in an infinite medium made of air. The initial temperature of the cylinder is 60 K and the temperature of the exterior air media is 20 K. I consider only the radiative losses.
Unfortunately, I feel that the solution of this problem can not be solved with comsol.
I am very surprised that no indication is given in the guides for a such classical problem !
Could you give me a model to help me to solve this problem ? Any helps to configure the GUI with the Heat Transfer module ?
Thank you
1 Reply Last Post 17 mars 2014, 08:09 UTC−4
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Posted:
1 decade ago
Hello Claire,
If you consider only radiations, you can consider that air is transparent.
You can draw a silver cylinder in 2d axy and apply surface to ambient radiation losses with an external temperature of 20K. Initial temperature of the silver 60K. Check your material properties.
Compute with a time dependent solver.
Julien
If you consider only radiations, you can consider that air is transparent.
You can draw a silver cylinder in 2d axy and apply surface to ambient radiation losses with an external temperature of 20K. Initial temperature of the silver 60K. Check your material properties.
Compute with a time dependent solver.
Julien