Combined gas radiation and mixed convection within a concentric cylindrical annulus: Entropy Generation

摘要

In the present paper, we carry out numerical computations to investigate the effects of thermal radiation on mixed convection through an absorbing-emitting non-gray gas, bounded by a concentric cylindrical annulus. The radiative properties of water vapor and its spectral nature are modeled by using the "Ray Tracing" method through S_4 directions, associated with the "statistical narrow band correlated-k" (SNBCK) model. The effects of boundary conditions and enclosure dimensions on the entropy generation are presented. Compared to wall radiative entropy production, the volumetric entropy generation is distinctly developed.