Conjugate non-gray gas radiation combined with natural convection inside a square cavity with internal heat source
A. Mazgar1, F. Hajji2, K. Jarray2, F. Ben Nejma2
1University of Sousse, Sousse, Tunisia
2University of Monastir, Monastir, Tunisia
Keywords: thermal radiation, free convection, non-gray gas, internal heat source
Abstract
This study aims to investigate the effect of gas radiation on laminar free convection flow within a square cavity with internal heat generation. The cavity walls are isothermally cooled whereas the inner body is kept constant at a higher temperature. An important finding from this analysis is that radiative contribution plays a major role in the acceleration of the vortexes, providing a homogenizing effect on temperature fields. It is also shown that the optimal level of energy efficiency is achieved if the heater is located at the center of the lower part of the enclosure and when the inclination angle of the enclosure is of π /4.
|
