COMPARISON OF HEAT TRANSFER & FLUID FLOW IN THE MICRO-CHANNEL WITH RECTANGULAR AND HEXAGONAL CROSS SECTION

Abstract

Due to the shrinking of the industrial equipment, the heat transfer and cooling of these devices are of
particular importance. Therefore, this paper studies fluid flow and heat transfer in a micro-channel. In
this study three-dimensional laminar numerical simulations, based on the Navier–Stokes equations and
energy equation, are obtained for pressure drop and heat transfer in these micro-channel heat sinks
under the same conditions. In this article, the first step is to investigate the effect of channel shape and
geometry on the heat transfer and pressure drop in micro-channels. In, the second step, the effect of
undefined heat flux and distinct input condition is investigated, and third step, the effect of increasing
the number of channels is checked to do an ideal form of heat transfer in a micro-channel. According to
the results, heat transfer using a hexagonal micro-channel is improved 20% on the rectangular microchannel
(with equal hydraulic diameter).