emissivity
 

hi,

a classical fluent test case for radiation in 3D enclosures is the radiation in an tertahedron.

this is discussed in detail in:

Murthy and Marthur; Finite volume method for radiative heat transfer using unstructured meshes. J Thermophys. and heat transf. 12, 3, 1998

I want to repeate this test case. does anyone know which emissivity is used in this calculation.

thank you

ulrich