Numerical analysis of microchannel heat sink composed of SiC and CNT reinforced ZrB2 composites

Numerical analysis of microchannel

Abstract

As a result of the development of micro-electro-mechanical systems (MEMS), it is now feasible to achieve enormous heat transfer even though the more compact spaces of electrical and electronic devices. A heat sink a device is which collects significant amounts of heat from various electrical and electronic surfaces and then releases that heat into the surrounding environment. In the current study, a ceramic microchannel heat sink (MCHS) with a rectangular channel having a length of 10 mm & dimension of 57×180 µm has been investigated numerically. Since ceramics are valuable materials that can withstand corrosive environments and extreme temperatures, it is statistically analyzed to evaluate if a substance can work under such harsh conditions. Firstly, the finite element approach is used to solve governing equations of the solid domain as ZrB₂ composites & fluid domain as water. Subsequently, a numerical analysis was conducted on an MCHS constructed from ZrB₂ composites reinforced with SiC and CNT having a variable proportion of 20 vol.% and 10 vol.%, respectively. The results reveal the most significant temperature reduction for an ultra-high heat flux for ZrB₂ composite reinforced with 20 vol.% SiC, followed by ZrB₂ composite reinforced with 20 vol.% SiC & 10 vol.% CNT at Reynolds number 250. The fundamental causes for exceptional heat transfer rate are the high surface density of the microchannel and the excellent thermal conductivity of UHTCs.