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About absorptivity and emissivity

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Old   August 19, 2009, 11:40
Question About absorptivity and emissivity
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Jung-ryun Lee
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Dear CFD members.

Hi, I`m ryun. When I solve radiation problem using DO model,

there are some trouble with my FLUENT solving.

So Can you help me about this??



I want to set the absorptivity of the wall of 0.9 and simultaneously to

set the emissivity of 0.1, making called "optical coating" condition.

But as I know in my short knowledge, FLEUNT assumes that emissivity and

absorptivity is same.

moreover, I can`t find any blank to fill the absorptivity.



So I'm glad you to let me know how to set the absorptivity of

the wall condition differ from emissivity.


PS : absoption coefficient isn`t considered in this matter.
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absorptivity, discreate ordinate, emissivity, radiation

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