Numerical investigation of trapezoidal grooved microchannel heat sink using nanofluids

Kuppusamy, Navin Raja; Mohammed, Hussein A.; Lim, Chin Wai

doi:10.1016/j.tca.2013.09.011

Cited by 74 publications

(22 citation statements)

References 38 publications

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“…On the other side, f of MCHS with passive enhance typically will increase compared to simple MCHS with increase of flow rate [15][16][17]19,20,27,28]. As expected, in Fig.…”

Section: Friction Factor Characteristicsupporting

confidence: 75%

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Optimum design of triangular shaped micro mixer in micro channel heat sink

Kuppusamy

Ghazali

Saidur

et al. 2015

International Journal of Heat and Mass Transfer

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“…On the other side, f of MCHS with passive enhance typically will increase compared to simple MCHS with increase of flow rate [15][16][17]19,20,27,28]. As expected, in Fig.…”

Section: Friction Factor Characteristicsupporting

confidence: 75%

“…Kuppusamy et al [19,20] performed numerical analysis on the thermal and flow performance of the MCHS with different shapes of grooves on the sidewall of the MCHS using nanofluid. It was found that thermal enhancement enhanced significantly compared to simple MCHS using water with negligible pressure loss.…”

Section: Introductionmentioning

confidence: 99%

Optimum design of triangular shaped micro mixer in micro channel heat sink

Kuppusamy

Ghazali

Saidur

et al. 2015

International Journal of Heat and Mass Transfer

Self Cite

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“…Al 2 O 3 -water nanofluids are selected as working substances in this study [29,30], which are assumed as the mixtures of base fluid (water) and Al 2 O 3 nanoparticle with 30 nm diameter. The physical properties of the base fluid and Al 2 O 3 nanoparticle [31,32] are shown in Table 1, in which the reference temperature is 293 K. A single-phase model [33] is used to evaluate the physical properties of Al 2 O 3 -water nanofluids, and based on the assumptions that the aluminium oxide nanoparticle is spherical and homogeneously suspended in the base fluid, the following models are used to compute density, specific heat, dynamic viscosity, and thermal conductivity, respectively.…”

Section: Physical Properties Of Nanofluidsmentioning

confidence: 99%

Heat Transfer Enhancement and Entropy Generation of Nanofluids Laminar Convection in Microchannels with Flow Control Devices

Xie

Zhang

et al. 2016

Entropy

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Abstract:The heat transfer enhancement and entropy generation of Al 2 O 3 -water nanofluids laminar convective flow in the microchannels with flow control devices (cylinder, rectangle, protrusion, and v-groove) were investigated in this research. The effects of the geometrical structure of the microchannel, nanofluids concentration ϕ(0%-3%), and Reynolds number Re (50-300) were comparatively studied by means of performance parameters, as well as the limiting streamlines and temperature contours on the modified heated surfaces. The results reveal that the relative Fanning frictional factor f/f 0 of the microchannel with rectangle and protrusion devices are much larger and smaller than others, respectively. As the nanofluids concentration increases, f/f 0 increases accordingly. For the microchannel with rectangle ribs, there is a transition Re for obtaining the largest heat transfer. The relative Nusselt number Nu/Nu 0 of the cases with larger nanofluids concentration are greater. The microchannels with cylinder and v-groove profiles have better heat transfer performance, especially at larger Re cases, while, the microchannel with the protrusion devices is better from an entropy generation minimization perspective. Furthermore, the variation of the relative entropy generation S 1 /S 1 0 are influenced by not only the change of Nu/Nu 0 and f/f 0 , but also the physical parameters of working substances.

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“…Many of the micro-channel design has been modified and studied, to achieve the higher heat transfer rate [2][3][4][5]. Ramos-Alvarado et al [2] carried a CFD study and heat transfer performance of the liquid cooled heat sinks.…”

Section: Introductionmentioning

confidence: 99%

“…They found that the friction flow and pressure gradient were higher than the conventional laminar flow theory. Kuppusamy et al [5] enhanced the heat transfer performance in trapezoidal channels. The increase in maximum width and the decrease in minimum depth for the trapezoidal channel will improve the heat transfer performance.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of inlet cross-section effect on oblique finned microchannel heat sink

Vinoth¹,

Duraisamy²

2018

THERM SCI

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The current study is focused on the heat transfer and flow characteristics of an oblique finned micro-channel heat sink with different inlet cross-sections. Water and Al 2 O 3 -water nanofluid with 0.25% volume fraction were used as heat transfer fluids. The oblique finned micro-channel heat sinks of size 48 × 80 mm were designed with three different inlet cross-sections, namely square, semicircle and trapezoidal. The ANSYS FLUENT simulations validated with the aid of an existing experimental work. The flow regime in micro-channel heat sink is constrained to laminar flow in the study. The three inlet cross-sections have been investigated by varying Reynolds number for Water and Al 2 O 3 -water nanofluid. The trapezoidal cross-section with average heat transfer rate 3.35% and pressure drop 8.6% is more efficient than other cross-sections due to larger wall area and effective entrance length. The oblique finned micro-channel heat sink with the trapezoidal cross-section is suitable for the micro-electronic cooling systems.

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Numerical investigation of trapezoidal grooved microchannel heat sink using nanofluids

Cited by 74 publications

References 38 publications

Optimum design of triangular shaped micro mixer in micro channel heat sink

Optimum design of triangular shaped micro mixer in micro channel heat sink

Heat Transfer Enhancement and Entropy Generation of Nanofluids Laminar Convection in Microchannels with Flow Control Devices

Numerical study of inlet cross-section effect on oblique finned microchannel heat sink

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