Enhancement thermodynamic performance of microchannel heat sink by using a novel multi-nozzle structure

Tran, Ngoctan; Chang, Yaw-Jen; Teng, James T. C.; Dang, Thanhtrung; Greif, R.

doi:10.1016/j.ijheatmasstransfer.2016.04.111

Cited by 33 publications

(4 citation statements)

References 36 publications

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“…Experimental studies of such manifold microchannel (MMC) heat sinks have shown heat flux dissipation in excess of 1 kW/cm 2 at moderate pressure drops [9,10]. The geometry of MMC heat sinks has been optimized for different performance objectives [11,12], with the optimized designs improving surface temperature uniformity and reducing the thermal resistance of the heat sink at a fixed pumping power compared to a standard microchannel heat sink without a manifold [13].…”

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confidence: 99%

A permeable-membrane microchannel heat sink made by additive manufacturing

Collins

Weibel

Pan

et al. 2019

International Journal of Heat and Mass Transfer

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Microchannel heat sinks are capable of removing dense heat loads from high-power electronic devices with low thermal resistance, but suffer from high pressure drops due to the small channel dimensions. Features that reduce the pressure drop, such as manifolds, increase fabrication complexity and are constrained by traditional subtractive manufacturing approaches. Additive manufacturing technologies offer improved design freedom and reduced geometric restrictions, expanding the types of features that can be produced and integrated into a heat sink. In this work, a novel permeable membrane microchannel (PMM) heat sink geometry is proposed and fabricated using direct metal laser sintering (DMLS) of an aluminum alloy (AlSi10Mg). In this PMM design, the cooling fluid is forced through thin, porous walls that act as both conducting fins and membranes that allow flow through their fine internal flow features for efficient heat exchange. The design leverages the ability of this fabrication process to incorporate complex, arbitrarily curved structures having internal porosity to enhance heat transfer and reduce pressure drop across the heat sink. The PMM heat sink geometry is benchmarked against a low-pressure-drop manifold microchannel (MMC) heat sink. A reduced-order model is used to explore the relative performance trends between the designs. Both heat sinks are experimentally characterized at flow rates of 50-500 mL/min using deionized water as the working fluid. At a constant pumping power of 0.018 W, the permeable membrane microchannel design offers both lower thermal resistance (17% reduction) and lower pressure drop (28% reduction) compared to the manifold microchannel heat sink.

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confidence: 99%

A permeable-membrane microchannel heat sink made by additive manufacturing

Collins

Weibel

Pan

et al. 2019

International Journal of Heat and Mass Transfer

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“…Osanloo et al [ 14 ] numerically studied the performance of a double-layer micro-channel heat sink with tapered channels. Tran et al [ 15 ] built a new type of multi-nozzle micro-channel heat sink and conducted numerical simulations to examine its heat transfer characteristics. The results showed that the structure could improve the temperature uniformity and heat transfer performance of the heat dissipation surface.…”

Section: Introductionmentioning

confidence: 99%

Enhanced thermal and mechanical performance of 3D architected micro-channel heat exchangers

Zhi

Wang

et al. 2023

Heliyon

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“…They concluded that in high Reynolds numbers, by using ribs and nanofluid, the performance evaluation criterion improves. Although various studies have been carried out on the heat transfer in new tools [24][25][26][27][28][29][30][31][32][33] and also investigated the cavity, ribs and any fluid turbulator with traditional inlet/ outlet, there is no study regarding the simultaneous effects of ribs, curve and novel inlet/outlet for fluid.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of thermal performance augmentation of nanofluid flow in microchannel heat sinks by using of novel nozzle structure: sinusoidal cavities and rectangular ribs

Khodabandeh

Akbari

Toghraie

et al. 2019

J Braz. Soc. Mech. Sci. Eng.

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In this paper, we present a numerical simulation of a laminar, steady and Newtonian flow of f-graphene nanoplatelet/water nanofluid in a new microchannel design with factors for increasing heat transfer such as presence of ribs, curves to enable satisfactory fluid mixing and changing fluid course at the inlet and exit sections. The results of this study show that Nusselt number is dependent on nanoparticles concentration, inlet geometry and Reynolds number. As the nanofluid concentration increases from 0 to 0.1% and Reynolds number from 50 to 1000, the Nusselt number enhances nearly up to 3% for increase in fluid concentration and averagely from 15.45 to 54.1 and from 14.5 to 55.9 for geometry with and without rectangular rib, respectively. The presence of ribs in the middle section of microchannel and curves close to hot walls causes a complete mixing of the fluid in different zones. When the nanoparticles concentration is increased, the pressure drop and velocity gradient will become higher. An increased concentration of nanoparticles in contribution with higher Reynolds numbers only increases the fraction factor slightly. (The fraction factor increases nearly 37% and 35% for Re = 50 and 1000, respectively.) The highest uniform temperature distribution can be found in the first zones of fluid in the microchannel and by further movement of fluid toward exit section, because of decreasing difference between surface and fluid temperature, the growth of temperature boundary layer increases and results in non-uniformity in temperature distribution in microchannel and cooling fluid. With decrease in the concentration from 0 to 0.1%, the average outlet temperature and FOM decrease nearby 0.62% and 6.15, respectively.

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Enhancement thermodynamic performance of microchannel heat sink by using a novel multi-nozzle structure

Cited by 33 publications

References 36 publications

A permeable-membrane microchannel heat sink made by additive manufacturing

A permeable-membrane microchannel heat sink made by additive manufacturing

Enhanced thermal and mechanical performance of 3D architected micro-channel heat exchangers

Numerical investigation of thermal performance augmentation of nanofluid flow in microchannel heat sinks by using of novel nozzle structure: sinusoidal cavities and rectangular ribs

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