"NUMERICAL STUDY OF THE EFFECT OF RIB SHAPE ON THE LAMINAR HEAT TRANSFER AND NANOFLUID FLOW IN MICROCHANNELS"

Abstract

This is a numerical study by ANSYS WORKBRENCH software of water and water-Ag nanofluid in rib shaped rectangular microchannel under constant heat flux. This study shows the influence of rectangular, triangular, elliptical and trapezoidal ribs on laminar heat transfer using Finite volume method and assuming that the height and width of the ribs are fixed, to study Different rib forms. Model of laminar flow choosed is (Re=1, 10, 50, and 100) and nanofluid volume fraction Scores of 0%, 2% and 4%. The results show that the increase in Reynolds number leads to friction coefficient increases In contrast temperature and fluid velocity decreases. Among all the rib forms investigated. the triangular rib shape have the best thermal performance evaluation also friction coefficient shows that the trapezoidal rib is recommended to use a high Reynolds number.