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-   -   How to set the emissivity of semi-transparent wall (http://www.cfd-online.com/Forums/fluent/36400-how-set-emissivity-semi-transparent-wall.html)

Thomas April 15, 2005 17:19

How to set the emissivity of semi-transparent wall
 
Hello fluent users,

im using the discrete ordinate modell with the "non gray radiation" options to simualte the behavior of solar radiation passing through a float glass. I defined five wavelength bands and different absorption coefficient which depends on the wavelength. But I didnīt find a possibility to set the emissivity for the bands on a semi-transparent (double sided) wall. I could set the diffuse fraction, and thats all. For opaque walls there is a possibility to set the emissivity for each band. If there should be no possibility to change/set the emissivity for a (double sided) semi-transparent wall, what emissivity does Fluent use instead?

Thanks for your help Thomas

phillerup July 28, 2009 14:24

I beleive the reflectance for a double sided wall is calculated based on the refractive indices of the adjacent continuums.

gan1990 June 27, 2013 02:53

Similar problem.
 
Hi,

I am also facing a similar problem,any solution?


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