Thermal hydraulic performance of a double-layer microchannel heat sink with channel contraction

Wong, Kok Cheong; Ang, M.L.

doi:10.1016/j.icheatmasstransfer.2016.09.013

Cited by 49 publications

(15 citation statements)

References 19 publications

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“…Since future technology demands for a greater heat removal, numerous researches have been done to improve the capability of the MCHS. Base materials (Ijam & Saidur, 2012;Peyghambarzadeh et al, 2014;Yang et al, 2019;Yang et al, 2020), fluid flow alteration (Zhai et al, 2016a;Zhai et al, 2016b;Shen et al, 2018;Jiang et al, 2020) and mixing with inserts (Bahiraei et al, 2019), microchannel shape and layout (Ahmed et al, 2016;Wong & Ang, 2017;Hemmat Esfe et al, 2017;Arani et al, 2017;Hajmohammadi & Toghraei, 2018), complex design of microchannels walls (Chai et al, 2013;Sakanova et al, 2015;Ma et al, 2017;Duangthongsuk & Wongwises, 2017;Shen et al, 2018;Sarlak et al, 2019), pin-fin hybrid (Alfellag et al, 2019;Soleymani et al, 2020;Zeng et al, 2020), implementation of manifolds (Pourfattah et al, 2019;Lin et al, 2021), jet injection (Jalali et al, 2019), double layers (Arani et al, 2017) and more have been consistently being explored to improve the performance of the MCHS. Additionally, Mohammed et al (2010) stated that the conventional method using gas, air and water as coolant for a MCHS will no longer be able to address future heating issue to remove as minimum as 1000W/cm 2 .…”

Section: Introductionmentioning

confidence: 99%

Effects of surfactant and nanofluid on the performance and optimization of a microchannel heat sink

Shamsuddin

Estellé

Navas

et al. 2021

International Journal of Heat and Mass Transfer

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This paper reports the influence of surfactant Triton X-100 on boron nitride nanotubes (BNNTs) nanofluid in non-optimized and optimized microchannel heat sink (MCHS) at 30⁰ C and 50⁰ C. The MCHS performance was evaluated in terms of thermal resistance and pressure drop, utilizing experimental thermophysical properties of distilled water, a mixture of distilled water and surfactant Triton X-100 as base fluid, and nanofluid BNNTs at weight concentration of 0.001% into MCHS models which further optimized with the Multiple Objective Particle Swarm Optimization (MOPSO) technique. It is found that the surfactant at 30⁰ C improves MCHS thermal capabilities without nanotubes by 0.8% even after optimizing MCHS according to the fluid properties. Conversely, surfactant Triton X-100 reduces pressure drop greatly with any change in thermal resistance at 50⁰ C and paired cooperatively with BNNTs nanofluid 0.001wt.% -mitigating pressure drop increment caused by the nanofluid resulting an overall performance improvement by 1.25% and 1.97% for thermal resistance and pressure drop respectively in MCHS systems and reduced to 1.3% and 3.2% after optimization. Optimized MCHS dimensions given by MOPSO could be manufactured and additionally gave wider solutions for large reduction of pressure drop up to 80% for economic MCHS with a drawback of higher thermal resistance.

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Section: Introductionmentioning

confidence: 99%

Effects of surfactant and nanofluid on the performance and optimization of a microchannel heat sink

Shamsuddin

Estellé

Navas

et al. 2021

International Journal of Heat and Mass Transfer

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“…Under the same volumetric flow rate, the structure shows that the thermal characteristics of the new complex structure DMHS outperforms that of the traditional DMHS or single-layer microchannel heat sink. References [52,53] studied two types of DMHS with tapered lower and upper channels (TDL-MCHS) with different structure, and the thermal performance could be improved by changing the channel angle. Khodabandeh et al [54] numerically studied a new type of sinusoidal cavity rectangular DMHS with nanofluid as coolant with mass fraction of 0-0.1% at Reynolds number among 50~1000.…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study

Zhang

Chen

et al. 2021

Energies

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This study proposes a novel design having dense fins with lesser thickness at the upper layer and comparatively spare fins with greater thickness in the lower layer to further improve the overall thermal performance of a double-layer microchannel heat sink. The design can effectively direct more low temperature fluid flow toward the lower layer to improve heat transfer while the sparse fin structure at low layer can ease pressure drop penalty. At the same time, the thicker fins at the lower layer ensure higher fin efficiency to facilitate high heat transfer. Parametric and detailed analysis is conducted for the proposed double-layer microchannel heat sink in comparison with the traditional one. After optimization, the thermal resistance of the proposed double-layer microchannel heat sink at the same pumping power is found to be reduced by 9.42% when compared to the traditional double-layer microchannel heat sink. Yet at the same Reynolds number, the Nusselt number of the proposed design exceeds the traditional value by 13%.

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“…It was found that the streamwise temperature rise was substantially reduced for DL-MCHS and that the pressure drop was also smaller than that of SL-MCHS. Motivated by these promising results, extensive studies have been subsequently conducted to explore the thermal and fluid properties of DL-MCHS [ 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 ]. Early studies mainly focused on the effectiveness verification of the DL-MCHS design.…”

Section: Introductionmentioning

confidence: 99%

“…Such new designs of DL-MCHS have been found to reduce thermal resistance and pumping power considerably. Osanloo et al [ 19 ] and Wong et al [ 20 ] developed DL-MCHS with tapered microchannels or channel contraction. Higher thermal performance was achieved for such improved DL-MCHS as compared to that with the conventional design of straight channels, but pumping power was increased.…”

Section: Introductionmentioning

confidence: 99%

Numerical Study of Double-Layered Microchannel Heat Sinks with Different Cross-Sectional Shapes

Deng

Zhang

et al. 2018

Entropy

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This work numerically studies the thermal and hydraulic performance of double-layered microchannel heat sinks (DL-MCHS) for their application in the cooling of high heat flux microelectronic devices. The superiority of double-layered microchannel heat sinks was assessed by a comparison with a single-layered microchannel heat sink (SL-MCHS) with the same triangular microchannels. Five DL-MCHSs with different cross-sectional shapes—triangular, rectangular, trapezoidal, circular and reentrant Ω-shaped—were explored and compared. The results showed that DL-MCHS decreased wall temperatures and thermal resistance considerably, induced much more uniform wall temperature distribution, and reduced the pressure drop and pumping power in comparison with SL-MCHS. The DL-MCHS with trapezoidal microchannels performed the worst with regard to thermal resistance, pressure drop, and pumping power. The DL-MCHS with rectangular microchannels produced the best overall thermal performance and seemed to be the optimum when thermal performance was the prime concern. Nevertheless, the DL-MCHS with reentrant Ω-shaped microchannels should be selected when pumping power consumption was the most important consideration.

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Thermal hydraulic performance of a double-layer microchannel heat sink with channel contraction

Cited by 49 publications

References 19 publications

Effects of surfactant and nanofluid on the performance and optimization of a microchannel heat sink

Effects of surfactant and nanofluid on the performance and optimization of a microchannel heat sink

Performance Improvement of a Double-Layer Microchannel Heat Sink via Novel Fin Geometry—A Numerical Study

Numerical Study of Double-Layered Microchannel Heat Sinks with Different Cross-Sectional Shapes

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