Simulation based study on heat transfer in microchannel heat sink with square ribs surface

Abstract

A simulation-based study is carried out on microchannel heat sink with smooth surface and square ribs embedded surface. The heat sink is made of microchannels where each channel is 150 μm in width, and 1 cm in length. Water is used to study the heat sink. The study is conducted for a range of Reynolds numbers, from 100 to 500. The fluids' inlet and outlet temperatures, and the surface temperatures are used to calculate the thermal performance. According to the investigation, a higher Reynolds number raises the heat transfer coefficient and increasing Nusselt number. Additionally, it has been noted that raising the Reynolds number lowers the friction factor. It was evident that the square ribs microchannel had a higher heat transfer rate than the smooth channel. Additionally, it is observed that the heat sink with square ribs microchannels overall friction factor is higher than the heat sink with smooth channels. It is also found that the pressure drop increases with increasing Reynolds number.

Keywords: Simulation, Computational Fluid Dynamics, Heat Transfer, Microchannels

DOI: 10.54941/ahfe1006394