Thermo-hydraulic performance enhancement in novel secondary connected fractal heat sink with cavities

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2025-03-20 DOI:10.1016/j.ijthermalsci.2025.109855

Shashank Singh, Anup Malik, Harlal Singh Mali

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引用次数: 0

Abstract

The flexible geometries of microchannel heat sinks (MCHS) allow for modified cooling solutions for a wide range of applications. This adaptability enables heat dissipation enhancement in a variety of sectors, including renewable energy systems and microelectronics. This study aims to build novel MCHS device for thermo-hydraulic performance enhancement. Two devices are, bottom cavities secondary connected fractal heat sink with one branching level (BCSC-FHS-L1) and two branching level (BCSC-FHS-L2), 3D printed by laser powder bed fusion (LPBF) technique. AlSi10Mg alloy is used as solid substrate and water as fluid with single-phase flow. Their performances are studied numerically and validated experimentally using an in-house developed test setup. BCSC-FHS-L2 shows superior thermal performance with the maximum enhancement of 35% in average Nusselt number (

N u_{a v g}

) at Reynolds number (

R e

)=793 with 67% increment in pressure drop (

Δ P

). BCSC-FHS-L2 shows the maximum overall performance (

O P

) at

R e

=270 with 17% enhancement compared to BCSC-FHS-L1 device.

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来源期刊

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.