TY - JOUR ID - 71243 TI - Numerical Investigation of Combined Radiation and Nutral Convention Heat Transfer in a Horizonal Annulus JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Sinaie, A AU - Mansouri, S. H. AU - Djavidi, M. AU - Rahnama, M. AD - Mechanical Engineering, Shahid Bahonar University of Kerman AD - , Shahid Bahonar University of Kerman Y1 - 1999 PY - 1999 VL - 12 IS - 4 SP - 259 EP - 270 KW - Radiation KW - Laminar Natural Convection KW - SIMPLER DO - N2 - Combined radiation and natural convection within the annular region of two infinitely long horizontal concentric cylinders are investigated numerically in this research. Radial and tangential radiation effects ate considered using Milne-Eddington approximation for a two-dimensional radiative transfer. The basic conservation equations are discretized with the finite volume method and SIMPLER algorithm. The result are presented through velocity vector field, streamline and isothermal plots. It is observed that radiation has significant effect on flow and temperature fields. Results of local Nusselt number prediction along the surface of the inner cylinder show that radiation suppresses the angular dependence of Nusselt number. UR - https://www.ije.ir/article_71243.html L1 - https://www.ije.ir/article_71243_85efcd417ad2e4bd2fb59fb58300eb2f.pdf ER -