Numerical analysis and parametric study of multilayered microchannel heat sinks

Abstract

A three-dimensional solid-fluid conjugated model is used to investigate and optimize the performances of two-, three-, and four-layered microchannel heat sinks. In the optimization process, constraints of fixed total pumping power and fixed total channel height are adopted, and the thermal resistance and bottom wall temperature uniformity are taken as the objective functions. The flow configuration, channel height, and pumping power in each layer are optimized. The results show that more uniform temperature distribution and lower thermal resistance occur at flow configuration (0, 1) for the two-layered microchannel heat sink, (0, 1, 1) for the three-layered microchannel heat sink, and (0, 1, 1, 1) for the four-layered microchannel heat sink. The channel height and pumping power in the bottom layer are dominant over those in the other layers. The optimal design requires a smaller bottom channel height and a higher pumping power than the average value in each layer. The multilayered microchannel heat sink with more layer numbers can achieve a more uniform bottom wall temperature and can also lead to a reduction in the thermal resistance.

Effect of undercut slots on the overall performance of microchannel heatsink

“…A literature review has been performed to help comprehend the advancements in the field of microchannel heat sinks. The researchers modified the geometry of the microchannel heat sink cross-section in order to IOP Publishing doi:10.1088/1757-899X/1259/1/012009 2 augment the performance of the heat sink to satisfy the rising demand for heat transfer [2][3] [4]. Jin et al [5] enhanced the heat transmission in various types of microchannels using different configurations of pinfins.…”

Investigations on Heat Transfer Characteristics of Porous Type Copper Heat Sink With Bifurcations

“…In reality the pores of copper heat sink are not exactly cylindrical in nature. Tetsuro Ogushi1et al [15] showed that lotus type porous heat sink has a heat transfer capacity nearly four times as compared with conventional groove fins. It must be noted that to reduce computational time, only small size of heat sink has been considered in this study.…”

Analysis of heat transfer enhancement in microchannel by varying the height of pin fins at upstream and downstream region

“…6,7 proposed the classification depend on dimensionless parameter known as confinement number (Co ≥ 0.5) and Harirchian and Garimella 8 distinguished the microchannel, based upon the product of Boltzmann number and Reynold’s number(Bo 0.5 Re < 160). Various work has been done to uplift the performance of microchannel heat sink due to the increasing demand of heat-dissipating rate which includes the modification in channel cross-section and shape such as straight channels, wavy, 9 double layered, 10 and multilayered 11 and also the use of nanoliquids as a working fluid through porous media are proposed. 12–20 Mohsen Izadi et al.…”