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 April 11, 2010, 14:49 Radiative Transfer Equation #1 New Member   Zoltán Hercz Join Date: Sep 2009 Posts: 17 Rep Power: 7 Hi Those who ever used the radiation modelling features in fluent, or know from elsewhere the Radiative Transfer Equation, please help me. from the fluent theory guide: I understand that the 1st term on the right hand side is the normal intensity of a plate perpendicular to the beam and its temperature is the same as the temperature of the medium in that point. I also understand that the sigma*t^4 is the total emission of the black body, and the normal intensity of the black body is the totalemission/pi in 3D. it comes from Lambert's law that states that intensity=normalintensity*cos(alfa). But using this law in 2d, the normalintensity=totalemission/2 Am I right ? So in case of 2d simulation, in the equation below sigam*T^4, 2 should be instead of pi. Please explain it. I want to use Discret ordinate model in a 2d simulation. Last edited by zmester; April 12, 2010 at 13:15.

 April 13, 2010, 15:02 #2 New Member   Zoltán Hercz Join Date: Sep 2009 Posts: 17 Rep Power: 7 ___________________________________?

 May 1, 2010, 09:24 #3 New Member   Zoltán Hercz Join Date: Sep 2009 Posts: 17 Rep Power: 7 Other question also arisen in me. Dont you know why it is necessary to give both theta and phi numbers for angular discretization in 2d (fluent)? I think angular discretization should be possible with just one. In 2d we have angle intead of solid angle. thanks Last edited by zmester; May 2, 2010 at 20:35.

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