Numerical optimization of the thermal performance of a microchannel heat sink

Ryu, Jewan; Choi, Daejeong; Kim, S.J.

doi:10.1016/s0017-9310(02)00006-6

Cited by 164 publications

(60 citation statements)

References 4 publications

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“…In addition, for the flow with higher Reynolds numbers, the singular point is closer to the exit of the channel. Ryu et al (12) studied the thermo-fluidic behavior of heat sink for microchannel using conventional simulation means and their results are within 4% of those presented by Tuckerman and Pease (2) . Furthermore, when the depth to width ratio is less than 10, an optimum heat dissipation effect is achievable for the heat sink using microchannel.…”

Section: Introductionsupporting

confidence: 58%

Heat Transfer for Water Flow in Triangular Silicon Microchannels

Chu

Teng²,

Greif³

2008

JTST

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This study investigated the behavior of pressure drops and heat transfer coefficients for four sets of triangular microchannels. Results of this study indicated that for Reynolds numbers less than 100, the Nusselt number tends to be nearly linearly increasing as the Reynolds number increases. The product of the friction factor and the Reynolds number (fRe) is slightly lower than those predicated by the conventional theory. Besides, high temperature gradient exists in the regions between the inlet and the exit of the flow channel. Furthermore, the difference between the values for Nu of those obtained from the empirical correlation for triangular microchannel and those from the experimental measurements was found to be within 15%.

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Section: Introductionsupporting

confidence: 58%

Heat Transfer for Water Flow in Triangular Silicon Microchannels

Chu

Teng²,

Greif³

2008

JTST

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“…When the volume constraint was applied, the optimal micro pin-fin aspect ratio for four, five and seven rows of micro pin fins had a constant value of 0.555, 0.621 and 0.735 respectively for the whole range of Bejan numbers used in this study. The pin-fin aspect ratio for the integrated design with three rows was 0.480, which did not meet the manufacturing constraint as stated in Equation (6). As a result of this, numerical simulation results for this were not reported for the variable axial length.…”

Section: Integrated Design(id) With Variable Axial Lengthmentioning

confidence: 94%

“…The pin-fin aspect ratio for two rows of micro pin fins was 0.434, which did not meet the manufacturing constraint in Equation (6). Therefore, numerical simulations for this were not reported.…”

Section: Integrated Design (Id) With Fixed Lengthmentioning

confidence: 99%

“…Numerical investigations were carried out by Ryu et al [6], [7] on microchannel heat sinks using the finite volume method incorporating an optimisation scheme which used the random search technique. Muller and Frechette [8] also used a numerical optimisation tool to optimise forced convection in microchannel heat sinks for minimum pumping power at high heat fluxes.…”

Section: Introductionmentioning

confidence: 99%

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Constructal design of combined microchannel and micro pin fins for electronic cooling

Adewumi

Bello‐Ochende

Meyer

2013

International Journal of Heat and Mass Transfer

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This paper presents a three-dimensional numerical study of steady, laminar, incompressible flow and forced convection heat transfer through a microchannel heat sink with micro pin fin inserts for both fixed and variable axial lengths. The objective of the study was to optimise the geometric configuration of an integrated microchannel and micro pin fins for different solid volumes so that the peak temperature in the configuration was minimised. The effect of the micro pin fins on the optimised microchannel was also investigated. The geometric optimisation of the integrated microchannel and micro pin fin was carried out using a computational fluid dynamics (CFD) code with a goal-driven optimisation tool subject to global constraints. The optimisation procedure was carried out in two steps. Firstly, the microchannel configuration was optimised without the micro pin fins inserted and the results were compared with similar work found in the open literature. This optimisation was carried out for both fixed and relaxed lengths. Thereafter, the integrated design of the microchannel and micro pin fins was optimised. The effect of the Bejan number on the solid volume fraction, channel aspect ratio and hydraulic diameter, pin fin aspect ratio, minimised peak temperature and maximized thermal conductance were reported. Results showed that as the Bejan number increased, the minimised peak temperature decreased. Also, the maximum thermal conductance increased with the optimised microchannel structure with three to six rows of micro pin fin inserts. Diminishing return set in when the number of rows of micro pin fin inserts was greater than three for the fixed length but for the relaxed length, as the number of rows increased, the results improved but when it exceeded six diminishing returns set in for a fixed solid volume of 0.9mm 3 . For each Bejan number used in this study, there was an optimum channel hydraulic diameter and aspect ratio, solid volume fraction and pin fin aspect ratio that satisfied the global objective.

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“…This microchannel cooling concept explains that the convective heat transfer coefficient is inversely proportional with the channel width. From this concept [2], it was found that the use of high-aspect ratio to a certain level will further reduce thermal resistances and this concept has proven to be instrumental in cooling electronic devices due to inherent simplicity, reliability, low cost and has been extensively been used in recent years [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

A Triangular Double Layer Microchannel Heat Sink: Effect of Parallel and Counter Flow

Manaf

Ahmed

Musse

et al. 2015

AMR

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Abstract.A numerical study is conducted by using ANSYS CFX 14.5, a commercial computational fluid dynamics program to predict the thermal performance of a counter and parallel flow on triangular double layered microchannel heat sink for various channel aspect ratios. Findings reveal that the counter flow configuration leads to a better heat transfer performance for low channel aspect ratio (α < 4) and higher Reynolds Number (Re > 700). For the parallel flow configuration, improved performance is normally shown when channel aspect ratio, α is more than 4 and lower Reynolds Number (Re < 700).

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Numerical optimization of the thermal performance of a microchannel heat sink

Cited by 164 publications

References 4 publications

Heat Transfer for Water Flow in Triangular Silicon Microchannels

Heat Transfer for Water Flow in Triangular Silicon Microchannels

Constructal design of combined microchannel and micro pin fins for electronic cooling

A Triangular Double Layer Microchannel Heat Sink: Effect of Parallel and Counter Flow

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