Effect of Short Pin Fin With Different Shapes and Arrangements on Thermal Resistance of Micro Heat Sink

Kewalramani, Gagan V.; Hedau, Gaurav; Saha, Sandip K.; Agrawal, Amit

doi:10.1615/jenhheattransf.2020034367

Cited by 6 publications

(3 citation statements)

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“…They proposed a 10× manifold microchannel design that could allow heat flux up to 1723 Wcm -2 for a maximum temperature rise of 60 K with an unprecedented coefficient of performance. Kewalramani et al (2020) tested the thermohydraulic characteristics of micro heat sinks with short micro pin fin of different shapes (square and elliptical)…”

Section: Other Methodsmentioning

confidence: 99%

“…experimentally investigated the heat transfer characteristics of gravity heat pipes with internal helical microfins in comparison with smooth gravity heat pipes. Kewalramani et al (2020) conducted experimental and numerical studies on the thermohydraulic characteristics of heat sinks with short micro pin fin (height of fin shorter than the total height of heat sink) of different shapes (square and elliptical) and different arrangements (interrupted and staggered) using deionized water as the coolant. Boussoukaia et al (2020) investigated the fractalization of convective flow upon vertical grooved disc/air interface under various uniform heat fluxes.…”

Section: Convectionmentioning

confidence: 99%

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Heat Transfer Enhancement-a Brief Review of Literature in 2020 and Prospects

et al. 2021

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This review provides a brief literature survey on enhanced heat transfer research published in the English language journals in 2020. A topic search containing either "heat transfer" or "heat transport" or "thermal transport" in the Web of Science resulted in over 28,000 papers published in 2020 and nearly 30% were relevant to heat transfer intensification, which indicates the importance and rapid development of heat transfer enhancement technologies. The chosen studies focus on various heat transfer enhancement research categorized into conduction, convection, radiation, boiling and condensation, energy storage, thermal management, and cross research involving two or more categories. Heat conduction papers are selected from the micro/nanoscale areas with a focus on interfacial phenomena. Important active, passive, and compound techniques for enhancing convective heat transfer are incorporated. Thermal radiation is concentrated on near-2 field radiation and solar energy. Heat transfer enhancement in boiling and condensation as well as in thermal energy storage, renewable and sustainable energy, and thermal management of electronics and high-end equipment is critical in many engineering applications. From the selected literature published in 2020, significant attempts have been made to research and development on heat transfer enhancement technology covering both conventional and emerging techniques. The prospects of the heat transfer enhancement research are reflected according to the literature survey.Research of innovative heat transfer enhancement techniques is immense, encompassing every aspect from understanding the fundamental theory and physical mechanisms of various heat transfer enhancement techniques to their applications. Research of emerging techniques using new interfacial materials, nanofluids, micro-and nano-structures, microchannels, and new compound enhancement techniques incorporating conventional and new techniques becomes popular.However, there are big challenges in understanding the mechanisms, engineering design methodology and applications with these emerging techniques. Many aspects are urgently needed to be investigated and developed to achieve systematic theory, mechanisms and design methodology for applications in thermal processes, energy storage, renewable energy, decarbonized heating and cooling and many industrial and civil sectors.

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Section: Other Methodsmentioning

confidence: 99%

Section: Convectionmentioning

confidence: 99%

Heat Transfer Enhancement-a Brief Review of Literature in 2020 and Prospects

et al. 2021

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“…Mahdi et al 14 recommended a wide upper‐side parallelogram design for straight fin geometry to improve the natural convection currents of a distributor transformer. Kewalramani et al 15 concluded, in their experimental and numerical work, that the shape of the pin fin (square and elliptical) has a considerable effect on the thermal resistance of the micro pin‐fin heat sink with an interrupted and staggered arrangement of the pin array. Adhikari et al 16 suggested a numerical multiparametric optimization technic to identify the optimum fin configuration, fin height, fin spacing, and fin length, for efficient heat transfer from finned surfaces under natural convection.…”

Section: Introductionmentioning

confidence: 99%

Comparative studies on performance of plain, perforated, threaded, and threaded–perforated pin fin: A numerical approach

et al. 2023

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A heat sink is a thermal management system for electrical and electronic appliances whose performance is a function of fin geometry, arrangement, and flow field. Earlier research addressed the enhancement in the heat dissipation capacity of the sink with a change in the geometry of the fin. However, the change should increase the heat transfer rate per unit weight and per unit volume. One such attempt is made in the present work, which deals with numerical forced convection heat transfer simulation over a pin fin with three different surface modifications, namely, threads, equilateral triangular perforation, and threads with perforations. A numerical investigation is performed for 0.5773–2.5574 mm pitch of threads, 3–4.8 mm size of perforation, and 2–8 m/s velocities of air. To describe the flow pattern around the fin and its variation with surface modification, streamline profiles are drawn which reveals that the fluid–solid interaction is improved either with threaded or perforated surface and is maximum for threaded–perforated fin. The enhanced convection rates bring down the local fin temperature and the maximum fin temperature, where the drop is more for the threaded surface than that of the perforated surface because of turbulence. A 10° drop in maximum fin temperature is achieved by replacing a plain pin fin with a threaded–perforated pin fin, and the drop is 8° with threads alone and 6° only with perforations. The increased fineness of threads and size of perforation further bring down the maximum fin temperature.

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