NUMERICAL PREDICTIONS OF ENTROPY GENERATION FOR MIXED CONVECTIVE FLOWS IN A VERTICAL CHANNEL WITH TRANSVERSE FIN ARRAY

This study is concerned with local entropy generation of the laminar m ixed-convective flow in a vertical channel with a series of transverse fins. These fins, placed on the hotter wall, provide more areas for h eat-transfer but meanwhile cause a significant increase in local irrev ersibilities. Numerical solutions of the elliptic momentum and energy equations are carried out with the stream functoin-vorticity method. D istribution of local entropy generation is further predicted by solvin g the entropy generation equation based on the obtained velocity and t emperature data. Results for various physical and geometric parameters are presented. Consequently, the geometric configuration of the finne d channel with higher second-law efficiency is proposed.