THERMAL SCIENCE

International Scientific Journal

Lihang Yu

,

Yuxin Ye

,

Zhenyu Wang

,

Ruiwen Liu

,

Xiangbin Du

,

Yanmei Kong

,

Shichang Yun

,

Jie Wang

,

Yulin Shi

,

Binbin Jiao

INVESTIGATION ON THE UNCONSTRAINED MICROFLUIDIC HEAT SINK WITH HIGH ANTI-BLOCKAGE CAPACITY FOR MULTIPLE HOTSPOTS SYSTEM

ABSTRACT
Microfluidic heat sinks are regarded as an efficient cooling solution in micro-electronic systems. However, as the hydraulic diameter of the microfluidic heat sinks shrinks, the blockage problem may occur due to the particles caused by cooling components’ abrasion, which limits the application in long-term operation. This paper proposes an unconstrained microfluidic heat sink (UCMFHS) with high anti-blockage capacity for multiple hotspot systems, which aims to solve the block-age problem. The position and shape of the micro pin fins in UCMFHS are optimized by the CFD model. According to the test requirements of anti-blockage capacity and cooling performance, the test platform is built, which adopts the thermal test chips as heat source array. The results show that when the coolant particle concentration is 0.5%, the pressure drop variation is less than 0.3 kPa in UCMFHS, which is 99.43% lower than the control sample. The average temperature and temperature non-uniformity coefficient of 16 hotspots under the condition of 1200 W/cm2 and 125 mL per minute are 141.1℃ and 0.049, respectively. Therefore, the UCMFHS has both anti-blockage capacity and cooling capacity and is considered to have a high application prospect in long-term multi-hotspot cooling.
KEYWORDS
Unconstrained microfluidic heat sink, Anti-blockage capacity, temperature uniformity, pin fins, Long-term operation, Multi-hotspots cooling
PAPER SUBMITTED: 2023-02-14
PAPER REVISED: 2023-05-25
PAPER ACCEPTED: 2023-07-14
PUBLISHED ONLINE: 2023-09-02
DOI REFERENCE: https://doi.org/10.2298/TSCI230214174Y
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2024, VOLUME 28, ISSUE Issue 2, PAGES [877 - 888]
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Investigation on the unconstrained microfluidic heat sink with high anti-blockage capacity for multiple hotspots system

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence