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March 11, 2015, 15:20 |
Heat Flux and Radiation at same boundary
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#1 |
New Member
Mario Arias
Join Date: Mar 2015
Posts: 6
Rep Power: 11 |
Hello,
I am trying to model a heat flux boundary condition on a surface, and would like to allow it to radiate into a vacuum. Is P-1 the correct radiation module?And if so, Do i just change the emissivity to a gray body where i want it to radiate, and 0 to any i want shielded in the boundary conditions? Thanks, Mario Arias |
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March 12, 2015, 09:56 |
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#2 |
Senior Member
Paritosh Vasava
Join Date: Oct 2012
Location: Lappeenranta, Finland
Posts: 732
Rep Power: 23 |
I did not understand what you mean by 'shielded'. Anyways with P1-model you will only have emissivity (for radiations) in the boundary setup. 'External Emissivity' for walls and 'Internal emissivity' for walls shared by the interfaces.
The choice of model would depend upon optical thickness. P-1 is good for optical thickness larger than 1. DO and DTRM do not have any such limitations and are more widely applicable. Also with DO you will have more choices over boundary conditions as you can also have semi-transparent material (e.g. glass) in the simulation. P.S: I too have started learning about radiation since last week. My answer is based on my very brief experience with simulating radiations with fluent. |
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March 13, 2015, 05:47 |
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#3 |
New Member
Mario Arias
Join Date: Mar 2015
Posts: 6
Rep Power: 11 |
All I have is a square microchannel heat exchanger. I am set a heat flux boundary condition on a single wall of that heat exchanger, and I would like to let it radiate to a vacuum.
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Tags |
fluent parallel memory, heat flux, p-1, radiation, radiation flux |
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