Heat transfer and flow analysis of Al<sub>2</sub>O<sub>3</sub>-Water nanofluids in interrupted microchannel heat sink with ellipse and diamond ribs in the transverse microchambers

Abdollahi, Ayoub; Sharma, Rajnish N.; Mohammed, Hussein A.; Vatani, Ashkan

doi:10.1080/01457632.2017.1379344

Cited by 41 publications

(15 citation statements)

References 32 publications

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“…However, maintaining safe operating temperatures in the rectangular MCHS design is becoming increasingly difficult due to the high thermal dissipation of the modern electronic chips [4]. Two key ways to solve this impending concern include increasing the heat transfer area with passive techniques and enhancing the coolant's thermophysical properties [5].…”

Section: Introductionmentioning

confidence: 99%

Hydrothermal Investigation of a Microchannel Heat Sink Using Secondary Flows in Trapezoidal and Parallel Orientations

Memon¹,

Cheema²,

Kim³

et al. 2020

Energies

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Thermal performance enhancement in microchannel heat sinks has recently become a challenge due to advancements in modern microelectronics, which demand compatibility with heat sinks able to dissipate ever-increasing amounts of heat. Recent advancements in manufacturing techniques, such as additive manufacturing, have made the modification of the microchannel heat sink geometry possible well beyond the conventional rectangular model to improve the cooling capacity of these devices. One such modification in microchannel geometry includes the introduction of secondary flow channels in the walls between adjacent mainstream microchannels. The present study computationally models secondary flow channels in regular trapezoidal and parallel orientations for fluid circulation through the microchannel walls in a heat sink design. The heat sink is made of silicon wafer, and water is used as the circulating fluid in this study. Continuity, momentum, and energy equations are solved for the fluid flow through the regular trapezoidal secondary flow and parallel secondary flow designs in the heat sink with I-type, C-type, and Z-type inlet–outlet configurations. Plots of velocity contours show that I-type geometry creates optimal flow disruption in the heat sink. Therefore, for this design, the pressure drop and base plate temperatures are plotted for a volumetric flow rate range, and corresponding contour plots are obtained. The results are compared with corresponding trends for the conventional rectangular microchannel design, and associated trends are explained. The study suggests that the flow phenomena such as flow impingement onto the microchannel walls and formation of vortices inside the secondary flow passages coupled with an increase in heat transfer area due to secondary flow passages may significantly improve the heat sink performance.

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Section: Introductionmentioning

confidence: 99%

Hydrothermal Investigation of a Microchannel Heat Sink Using Secondary Flows in Trapezoidal and Parallel Orientations

Memon¹,

Cheema²,

Kim³

et al. 2020

Energies

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“…Besides that, vortex flow induced by the rib geometry because of adverse pressure gradient can change the flow structure of fluid at the nearest cavity area, where the increase in the degree of flow mixing can contribute to the enhancement of heat transfer performance Some criteria need to be considered during the preparation of nanofluid, which include base fluid selection, size, shape, concentration, purity, dispersibility, thermal conductivity, preparation method (dispersion technique and sonication time [121,122]), and compatibility of nanoparticles that ensure the homogeneity of nanofluid [123]. Table 3 shows some types of nanoparticles that have been used in the MCHS application in the previous studies [124][125][126][127][128][129][130][131][132][133][134][135][136] It can be observed that most of the researchers were interested in Al 2 O 3 nanoparticle as an additive in a base fluid for the MCHS application. Besides that, pure water such as deionised (DI) and distilled water was widely used as a base fluid in the analysis.…”

Section: Utilisation Of Nanofluid In An Mchs With Passive Designmentioning

confidence: 99%

A review of passive methods in microchannel heat sink application through advanced geometric structure and nanofluids: Current advancements and challenges

Japar

Sidik

Saidur

et al. 2020

Nanotechnology Reviews

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Microchannel heat sink (MCHS) is an advanced cooling technique to fulfil the cooling demand for electronic devices installed with high-power integrated circuit packages (microchips). Various microchannel designs have been innovated to improve the heat transfer performance in an MCHS. Specifically, the utilisation of nanotechnology in the form of nanofluid in an MCHS attracted the attention of researchers because of considerable enhancement of thermal conductivity in nanofluid even at a low nanoparticle concentration. However, a high-pressure drop was the main limitation as it controls the MCHS performance resulted from heat transfer augmentation. Therefore, this study aimed to critically summarise the challenges and limitations of both single and hybrid passive methods of MCHS. Furthermore, the performance of nanofluid as a coolant in the MCHS as affected by the type and concentration of nanoparticle and the type of base fluid was reviewed systematically. The review indicated that the hybrid MCHS provides a better cooling performance than MCHS with the single passive method as the former results in a higher heat transfer rate with minimal pressure drop penalty. Besides that, further heat transfer performance can be enhanced by dispersing aluminium dioxide (Al2O3) nanoparticles with a concentration of less than 2.0% (v/v) in the water-based coolant.

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“…There are numerous research articles available in the literature 13–52 attributed to fluid flow and heat transfer characteristics of nanofluid in microchannels as well as MCHS. Vafaei and Wen 13,14 experimentally measured the effect of nanoparticle concentration (1-7vol.%) and volume flow rate (8-20ml/min) on fluid flow and heat transfer characteristics of Al2O3/water nanofluid in a circular microchannel (Di=510μm,t=160…”

Section: Introductionmentioning

confidence: 99%

Single-phase fluid flow and heat transfer characteristics of nanofluid in a circular microchannel: Development of flow and heat transfer correlations

Lodhi

Sheorey

Dutta

2020

Proceedings of the Institution of Mechanical Engineers, Part C:

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The convective heat transfer in microchannels with the use of nanofluids has proved to be a potential candidate for cooling of micro-electromechanical system devices. The current research article presents the experimental study on fluid flow and heat transfer characteristics of [Formula: see text]/water nanofluid in a microchannel under thermally developing laminar flow at Reynolds number ranging from 300 to 1000. The experimental set-up of a circular microchannel test section with an inner diameter of [Formula: see text] and length of [Formula: see text] is fabricated to conduct the experimental study. The effect of nanoparticle concentration ([Formula: see text]), Reynolds number ([Formula: see text]) on fluid flow and heat transfer characteristics of [Formula: see text]/water nanofluid have been measured and compared with that of distilled water (DW). The results indicate that the maximum enhancement in local heat transfer coefficient is achieved up to [Formula: see text], while friction factor is achieved up to [Formula: see text] for [Formula: see text]/water nanofluid with nanoparticle concentration of [Formula: see text] as compared to DW. The results showed that the performance evaluation criterion of [Formula: see text]/water nanofluid is greater than unity ([Formula: see text]), implying the benefits of nanofluids as compared to DW. Moreover, the predicted data obtained by the present proposed correlations for friction factor and local Nusselt number using [Formula: see text]/water nanofluid show reasonably good agreement with the deviations of [Formula: see text] and [Formula: see text], respectively, with the numerical data as compared to the predicted data obtained by the existing correlations available in the literature.

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Heat transfer and flow analysis of Al₂O₃-Water nanofluids in interrupted microchannel heat sink with ellipse and diamond ribs in the transverse microchambers

Cited by 41 publications

References 32 publications

Hydrothermal Investigation of a Microchannel Heat Sink Using Secondary Flows in Trapezoidal and Parallel Orientations

Hydrothermal Investigation of a Microchannel Heat Sink Using Secondary Flows in Trapezoidal and Parallel Orientations

A review of passive methods in microchannel heat sink application through advanced geometric structure and nanofluids: Current advancements and challenges

Single-phase fluid flow and heat transfer characteristics of nanofluid in a circular microchannel: Development of flow and heat transfer correlations

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Heat transfer and flow analysis of Al2O3-Water nanofluids in interrupted microchannel heat sink with ellipse and diamond ribs in the transverse microchambers

Cited by 41 publications

References 32 publications

Hydrothermal Investigation of a Microchannel Heat Sink Using Secondary Flows in Trapezoidal and Parallel Orientations

Hydrothermal Investigation of a Microchannel Heat Sink Using Secondary Flows in Trapezoidal and Parallel Orientations

A review of passive methods in microchannel heat sink application through advanced geometric structure and nanofluids: Current advancements and challenges

Single-phase fluid flow and heat transfer characteristics of nanofluid in a circular microchannel: Development of flow and heat transfer correlations

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Heat transfer and flow analysis of Al₂O₃-Water nanofluids in interrupted microchannel heat sink with ellipse and diamond ribs in the transverse microchambers