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-   -   About absorptivity and emissivity (http://www.cfd-online.com/Forums/fluent/67571-about-absorptivity-emissivity.html)

Ryun August 19, 2009 10:40

About absorptivity and emissivity
 
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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