Thermally developing Poiseuille flow affected by radiation

A combined convective and radiative heat transfer problem in thermally deve loping Poiseuille flow in a cylindrical tube is analyzed. A complex form of the nonlinear integrodifferential radiative transfer equation is solved by the discrete ordinates method in an axisymmetric geometry. To check its ac curacy, the solution obtained by the discrete ordinates method is compared with that solved by the integral method. A parametric study is also perform ed for the conduction-to-radiation parameter, optical thickness, wall emiss ivity, scattering albedo, and linear anisotropic scattering coefficient. Th e results show a significant effect of the radiation on the thermal charact eristics.