@Article{fdmp.2012.008.311, AUTHOR = {Nadia Dihmani, Samir Amraqui, Ahmed Mezrhab,2, Najib Laraqi}, TITLE = {Numerical Modelling of Rib Width and Surface Radiation Effect on Natural Convection in a Vertical Vented and Divided Channel}, JOURNAL = {Fluid Dynamics \& Materials Processing}, VOLUME = {8}, YEAR = {2012}, NUMBER = {3}, PAGES = {311--322}, URL = {http://www.techscience.com/fdmp/v8n3/24305}, ISSN = {1555-2578}, ABSTRACT = {Natural convection with surface radiation heat transfer is investigated numerically in a vented vertical channel heated asymmetrically. The numerical solution is obtained using a finite volume method based on the SIMPLER algorithm for the treatment of velocity-pressure coupling. Concerning the radiation exchange, in particular, the working fluid is assumed to be transparent, so that only the solid surfaces (assumed diffuse-grey) give a contribute to such exchange. The effect of Rayleigh numbers and rib width (for Pr=0.7 air fluid) on the heat transfer and flow structure in the channel is examined in detail. Results are presented in terms of isotherms, streamlines, and average Nusselt number.}, DOI = {10.3970/fdmp.2012.008.311} }