Heat Transfer Enhancement of Staggered Ribbed Backward Facing Step Flow with Inclined Impinging Jet

Abstract

In this paper, A numerical study has been done to predict the heat transfer of the staggered ribbed backward facing step flow with inclined impinging jet flow. The impinging jet flow was inclined towards the main cross flow and the angle of inclination is ranged from 30ْ to 90ْ . The ribs were in staggered arrangement and aligned after the slot jet in normal direction to the main cross flow. The effect of angle of inclination and contraction ratio on thermal field was studied for jet and channel Reynolds number of 20000 and 16000 respectively. The aim of the present study is to verify how adding staggered ribs with inclined jet flow to the problem of backward facing can enhance the rate of heat transfer. The governing partial differential equations of continuity, Navier-Stockes and energy was discretised on non-uniform staggered grid by using finite volume method. The discretised algebraic equations were solved by using a built home computer program based on simple algorithm. The conducted results show that the considered flow geometry increased noticeably the rate of heat transfer for the studied contraction ratios and angle of inclination. It was observed that the rate of heat transfer is decreased as angle of inclination increases.