Study of fow uniformity within convergent microchannels with a circular manifold

Abstract

elocity distribution among microchannels has a signifcant efect on the cooling performance of heat transfer fuids in contact with the heat sinks. In this study, a novel circular manifold’s practical role in the fuid distribution and fow uniformity among microchannels is investigated. Twenty microchannels are placed around the circular manifold as their cross section varies with convergence or divergence angles ranging from 0 to 10°, leading to the Reynolds numbers of 10, 88, 300, 500, and 1000. The infuence of the manifold geometry, microchannel characteristics, and Reynolds number on fow uniformity is investigated. The results reveal that the maximum fow uniformity is obtained for four inlets around the manifold and an outlet in its center where the convergence angle of microchannels is 6°