coefficients for radiation models

April 11, 2002, 13:05

Where can I find values of absorbtion coefficients and scattering coefficients for air or does anyone know off-hand what they are for stp?

April 16, 2002, 04:01

1. Both of absortiopn coeff. and scattering coeff. are not fluid property, but dependent of your system.

2. For air, they are actually zero, because pure O2 and N2 are non-emmiting or non-absorbing species. But, sometimes, they use very small value considering small amount of CO2 and/or H2o in the air.

Sincerely, Jinwook

April 11, 2002, 13:05	coefficients for radiation models	#1
Gaz Guest Posts: n/a	Where can I find values of absorbtion coefficients and scattering coefficients for air or does anyone know off-hand what they are for stp?

April 16, 2002, 04:01	Re: coefficients for radiation models	#2
Jin-Wook LEE Guest Posts: n/a	1. Both of absortiopn coeff. and scattering coeff. are not fluid property, but dependent of your system. 2. For air, they are actually zero, because pure O2 and N2 are non-emmiting or non-absorbing species. But, sometimes, they use very small value considering small amount of CO2 and/or H2o in the air. Sincerely, Jinwook

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