Rosseland mean absorption coefficient

Rosseland mean absorption coefficient

[′rȯs·lənd ′mēn əb′sȯrp·shən ‚kō·i‚fish·ənt]
(optics)
A coefficient of opacity that is the inverse of a weighted mean of the transmission coefficient over all frequencies.
References in periodicals archive ?
NOMENCLATURE a = Constant g = Acceleration due to gravity k = Thermal Conductivity Pr = Prandtl Number T = Fluid Temperature Tw = Surface Temperature T8 = Free Stream Temperature u,v = Velocity Components x,y = Cartesian Coordinates f(x) = Dimensionless Stream Function Gr = Grashof Number qr = Heat Flux Radiation Bo = Magnetic Field of Constant Strength R = Radiation Parameter Ks = Rosseland Mean Absorption Coefficient K = Thermal Conductivity Coefficient GREEK SYMBOLS [beta] = Thermal Expansion Coefficient [micro] = Dynamic Coefficient of Viscosity [thera] ([bern]) = Dimensionless Temperature [eta] = Similarity Variable [rho] = Fluid Density [PSI] = Stream Function [sigma]' = Stefan-Bottzman Constant 2.