diffuse fraction, absorption coefficent -- CFD Online Discussion Forums

April 3, 2017, 10:22	diffuse fraction, absorption coefficent	#1
HoussameYi New Member Houssame Join Date: Feb 2016 Posts: 6 Rep Power: 10	Hi all, I am simulating radiation using the do model, and I have set opaque walls, i will need to specify the internal emissivity as well as the diffuse fraction, my questions is: 1-How can I get the information about what are my diffuse fractions ? and what is the mathematical definition of diffuse fraction ( diffuse energy/total refracted energy ? ) 2-In the material pannel, I need to specify the absoprtion coefficient for each zone of my fluid domain, but i can't find this coefficient for my solids what should I do ? any suggestions ? is this coefficient important ? Thanking you !

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