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Micromachines 2019, 10(2), 80; https://doi.org/10.3390/mi10020080

Pressure Drop of Microchannel Plate Fin Heat Sinks

1
School of Mechanical, Electronic and Control Engineering, Beijing Jiaotong University, Beijing 100044, China
2
Beijing Key Laboratory of Powertrain for New Energy Vehicle, Beijing Jiaotong University, Beijing 100044, China
*
Authors to whom correspondence should be addressed.
Received: 30 December 2018 / Revised: 20 January 2019 / Accepted: 22 January 2019 / Published: 24 January 2019
(This article belongs to the Special Issue Gas Flows in Microsystems)
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Abstract

The entrance region constitutes a considerable fraction of the channel length in miniaturized devices. Laminar slip flow in microchannel plate fin heat sinks under hydrodynamically developing conditions is investigated semi-analytically and numerically in this paper. The semi-analytical model for the pressure drop of microchannel plate fin heat sinks is obtained by solving the momentum equation with the first-order velocity slip boundary conditions at the channel walls. The simple pressure drop model utilizes fundamental solutions from fluid dynamics to predict its constitutive components. The accuracy of the model is examined using computational fluid dynamics (CFD) simulations and the experimental and numerical data available in the literature. The model can be applied to either apparent liquid slip over hydrophobic and superhydrophobic surfaces or gas slip flow in microchannel heat sinks. The developed model has an accuracy of 92 percent for slip flow in microchannel plate fin heat sinks. The developed model may be used to predict the pressure drop of slip flow in microchannel plate fin heat sinks for minimizing the effort and expense of experiments, especially in the design and optimization of microchannel plate fin heat sinks. View Full-Text
Keywords: pressure drop; microchannels; heat sinks; slip flow; electronic cooling pressure drop; microchannels; heat sinks; slip flow; electronic cooling
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Duan, Z.; Ma, H.; He, B.; Su, L.; Zhang, X. Pressure Drop of Microchannel Plate Fin Heat Sinks. Micromachines 2019, 10, 80.

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