Numerical investigation of a novel manifold micro-pin-fin heat sink combining chessboard nozzle-jet concept for ultra-high heat flux removal

Jü, Xing; Xu, C.; Zhou, Yi; Liao, Zhirong; Yang, Yongping

doi:10.1016/j.ijheatmasstransfer.2018.06.059

Cited by 46 publications

(7 citation statements)

References 33 publications

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“…f ¼ 0:77Re �0:381 ð1 þ fÞ 0:28 (15) 100 ≤ Re ≤ 1000, 0 ≤ f ≤ 0.1 The correlations formulated are applicable for water, CuO-water and Al 2 O 3 -water nanofluids within a specified range of volume fraction (0-10%) and Re (100-1000). Predicted data values at the most deviates the actual value by ±15.0% for Nu and ±12.0% for f. The mean absolute error (MAE) is calculated as…”

Section: Resultsmentioning

confidence: 99%

“…Pin-fin with jet impingement cooling was found to be more effective in heat transfer enhancement while plate-fin created obstruction in the flow path. 10 To further improve the heat sink performance several other combinations of the passive heat sink configuration with the jet impingement techniques were reported such as a combination of the microchannel, jet impingement and dimpled surface, 11 jet impingement on the surface with spherical cavity, 12 jet impingement on the concave-dimpled surface, 13 jet impingement on the plate with ribs, 14 chessboard type of arranged nozzle jet impingement on pin-fin heat sink, 15 and jet impingement on porous wire mesh rectangular channels. 16 These combinations helped to interrupt the thermal boundary layer and improve flow mixing, thus enhance the cooling.…”

Section: Introductionmentioning

confidence: 99%

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Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al₂O₃-water and CuO-water nanofluids

Pandey

Husain

Ansari

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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This study investigates the effects of nanofluids and its particle volume fractions on performance enhancement of hybrid microchannel-pillar-jet impingement heat sink. The nanofluids used are Al2O3-water and CuO-water. A three-dimensional numerical model is applied to determine the fluid flow and heat transfer performance parameters such as pressure drop, temperature distribution, heat transfer coefficient, pumping power, and thermal resistance. Fluid flow through the jets and channel is assumed to be incompressible steady and laminar for a small range of low Reynolds number (Re ≤ 1000). The results obtained using nanofluid as the working fluid are compared with pure water, which shows that the performance is significantly increased using nanofluids as the heat transfer coefficient is increased and temperature-rise is reduced, however, the pumping power requirement is elevated. Moreover, CuO-water nanofluid provided better thermal management than Al2O3-water, and it is further improved with the increase in particle volume fractions in the base fluid. A trade-off between thermal resistance and pumping power has been obtained and discussed in view of energy consumption and capacity. Empirical correlations and artificial neural network model are developed to predict heat sink performance using water and Al2O3/CuO-water nanofluids as coolant. The model predictions are found within 15% deviation from the numerical data for nanofluids with particle volume fraction from 2-10% and Reynolds number from 100-1000.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al₂O₃-water and CuO-water nanofluids

Pandey

Husain

Ansari

2022

Proceedings of the Institution of Mechanical Engineers, Part C:

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“…They showed that the case with a larger hydraulic diameter compared to the case with a smaller hydraulic diameter lead to lower thermal resistance and higher heat transfer coefficient. Ju et al [21] presented numerical modeling to analyze thermal and hydrodynamic performances of the micro-pin-fin heat sink. Their result showed that heat sinks with square and circular micro-pin-fins with the same cross-sectional area have the same thermal performance.…”

Section: Introductionmentioning

confidence: 99%

Numerical Investigation of Geometric Parameters Effects on Heat Transfer Enhancement in a Manifold Microchannel Heat Sink

2022

IJE

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“…The second group of studies has been devoted to improve the heat transfer area in the heat sinks by optimizing the channel shape and using porous media and fins (Shao et al , 2007; Bezaatpour and Goharkhah, 2018; Sing and Sinha, 2017; Feng et al , 2013; Bezaatpour and Goharkhah, 2019). Experimental and numerical investigations indicate that geometric configuration of fins has a significant effect on the convective heat transfer and flow characteristics (Ju et al , 2018; Lei et al , 2018). Sathyamurthy et al (1996) studied experimentally and numerically on the heat sinks with planar and staggered fins.…”

Section: Introductionmentioning

confidence: 99%

A novel heat sink design for simultaneous heat transfer enhancement and pressure drop reduction utilizing porous fins and magnetite ferrofluid

Bezaatpour

Goharkhah

2019

HFF

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Purpose With development of the modern electronic and mechanical devices, cooling requirement has become a serious challenge. Innovative heat transfer enhancement methods are generally accompanied by undesirable increase of pressure drop and consequently a pumping power penalty. The current study aims to present a novel and easy method to manufacture a mini heat sink using porous fins and magnetite nanofluid (Fe3O4/water) as the coolant for simultaneous heat transfer enhancement and pressure drop reduction. Design/methodology/approach A three-dimensional numerical study is carried out to evaluate the thermal and hydrodynamic performance of the mini heat sink at different volume fractions, porosities and Reynolds numbers, using finite volume method. The solver specifications for discretization of the domain involve the SIMPLE, second-order upwind and second order for pressure, momentum and energy, respectively. Findings Results show that porous fins have a favorable effect on both heat transfer and pressure drop compared to solid fins. Creation of a virtual velocity slip on the channel-fin interfaces similar to the micro scale conditions and the flow permeation into the porous fins are the main mechanisms of pressure drop reduction. On the other hand, the heat transfer enhancement is attributed to the increase of the solid-fluid contact area and the improvement of the flow mixing because of the flow permeation into the porous fins. An optimal porosity for maximum convective heat transfer enhancement is obtained as a function of Reynolds number. However, taking both pressure drop and heat transfer effects into account, the overall heat sink performance is shown to be improved at high of Reynolds numbers, volume fractions and fin porosities. Research limitations/implications Thermal radiation and gravity effects are ignored, and thermal equilibrium is assumed between solid and fluid phases. Originality/value A maximum of 32 per cent increase of convective heat transfer is achieved along with a maximum of 33 per cent reduction in the pressure drop using porous fins and ferrofluid in heat sink.

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Numerical investigation of a novel manifold micro-pin-fin heat sink combining chessboard nozzle-jet concept for ultra-high heat flux removal

Cited by 46 publications

References 33 publications

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al₂O₃-water and CuO-water nanofluids

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al₂O₃-water and CuO-water nanofluids

Numerical Investigation of Geometric Parameters Effects on Heat Transfer Enhancement in a Manifold Microchannel Heat Sink

A novel heat sink design for simultaneous heat transfer enhancement and pressure drop reduction utilizing porous fins and magnetite ferrofluid

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Numerical investigation of a novel manifold micro-pin-fin heat sink combining chessboard nozzle-jet concept for ultra-high heat flux removal

Cited by 46 publications

References 33 publications

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al2O3-water and CuO-water nanofluids

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al2O3-water and CuO-water nanofluids

Numerical Investigation of Geometric Parameters Effects on Heat Transfer Enhancement in a Manifold Microchannel Heat Sink

A novel heat sink design for simultaneous heat transfer enhancement and pressure drop reduction utilizing porous fins and magnetite ferrofluid

Contact Info

Product

Resources

About

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al₂O₃-water and CuO-water nanofluids

Artificial neural network and numerical analysis for performance enhancement of hybrid microchannel-pillar-jet impingement heat sink using Al₂O₃-water and CuO-water nanofluids