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 radiation heat transfer (V-shaped and rect cavity) Post Reply Forum
 Posted by: daviduta ® 07/24/2006, 12:14:02 Author Profile eMail author Edit Hello, I need help with this problem,Find radiosity B as a function of coordinates (x,y) over a V-shape or rectangular cavity. Consider the two walls and the surroundings to constitute an enclosure. Without any loss of generality, the cavity can have a unit depth. The temperature and emittance for the cavity walls have constant values. Calculate the effective emittance {using equation, ε/ε a = Q/Qb = Q/(σAo(Tw^4 - Too^4)) } as a function of the local emittance for configurations selected from the following figures,http://img162.imageshack.us/my.php?image=64dg5.jpg http://img162.imageshack.us/my.php?image=66fi2.jpgε = Common emittance ε a = Apparent emittance Q = Effective emissive power of the cavity Qb = Radiant emission of a black surface stretched across the opening of the black walled cavity Ao = Area of fictitious surface stretched across cavity opening Tw = Wall temperature Too (Tinfinity) = External environment temperature σ = Stefan Boltzmann's constant