Optimum thermal design of microchannel heat sink with triangular reentrant cavities

Xia, Guodong; Chai, Lei; Wang, Haiyan; Zhou, Mingzheng; Cui, Zhenzhen

doi:10.1016/j.applthermaleng.2010.12.022

Cited by 197 publications

(46 citation statements)

References 15 publications

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“…They pointed out that both fluid flow and heat transfer are in developing regime and cannot be neglected in the analysis. Recently, Xia et al [15] carried the numerical simulation to examine the effect of geometric parameters on water flow and heat transfer characteristics in microchannel heat sink with triangular reentrant cavities. By using the thermal enhancement factor performance maps, they pointed out that the optimal geometric parameters can be obtained in principle.…”

Section: Introductionmentioning

confidence: 99%

“…Since then, MCHS performance using different substrate materials and channel dimensions have been studied extensively in the past two decades. These studies can be categorized into theoretical [3][4][5][6], numerical [7][8][9][10][11][12][13][14][15][16][17], and experimental approaches [18][19][20][21]. In the theoretical approach, the main objective is to develop design schemes that can be used to optimize microchannel heat sink performance.…”

Section: Introductionmentioning

confidence: 99%

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Simple model for predicting microchannel heat sink performance and optimization

Tsai

Chein

2011

Heat Mass Transfer

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A simple model was established to predict microchannel heat sink performance based on energy balance. Both hydrodynamically and thermally developed effects were included. Comparisons with the experimental data show that this model provides satisfactory thermal resistance prediction. The model is further extended to carry out geometric optimization on the microchannel heat sink. The results from the simple model are in good agreement as compared with those obtained from three-dimensional simulations

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Simple model for predicting microchannel heat sink performance and optimization

Tsai

Chein

2011

Heat Mass Transfer

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“…The research on heat and mass enhancement based on flow control structures, such as pin-fin [2], groove [3], cavity [4], tip clearance [5], rib [6], dimple/protrusion [7], and bifurcation [8], is well conducted. Especially, the microchannel with pin-fins is widely used because of its high efficiency of heat transfer.…”

Section: Introductionmentioning

confidence: 99%

Effects of Endwall Fillet and Bulb on the Temperature Uniformity of Pin-Fined Microchannel

Pan

et al. 2017

Entropy

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Endwall fillet and bulb structures are proposed in this research to improve the temperature uniformity of pin-fined microchannels. The periodical laminar flow and heat transfer performances are investigated under different Reynolds numbers and radius of fillet and bulb. The results show that at a low Reynolds number, both the fillet and the bulb structures strengthen the span-wise and the normal secondary flow in the channel, eliminate the high temperature area in the pin-fin, improve the heat transfer performance of the rear of the cylinder, and enhance the thermal uniformity of the pin-fin surface and the outside wall. Compared to traditional pin-fined microchannels, the flow resistance coefficient f of the pin-fined microchannels with fillet, as well as a bulb with a 2 µm or 5 µm radius, does not increase significantly, while, f of the pin-fined microchannels with a 10 µm or 15 µm bulb increases notably. Moreover, Nu has a maximum increase of 16.93% for those with fillet and 20.65% for those with bulb, and the synthetic thermal performance coefficient TP increases by 16.22% at most for those with fillet and 15.67% at most for those with bulb. At last, as the Reynolds number increases, heat transfer improvement of the fillet and bulb decreases.

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“…They claimed that the groove channel provides a maximum gain of 1.33 on the thermal performance factor which is obtained for the case of B/H=0.75. Ahmed et al [8] conducted a numerical simulation to investigate the effect of geometrical parameters on laminar flow and forced convection heat transfer characteristics in grooved micro-channel heat sinks similar to the analysis performed by Xia et al [9]. Eiamsa-ard et al [10] implemented an experimental investigation to examine the combined effects of rib-groove turbulators on the turbulent forced convection heat transfer and friction characteristics in a rectangular duct with rib-groove combinations like triangular rib-rectangular groove, rectangular rib-triangular groove and triangular rib-triangular groove.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of 3D turbulent forced convective heat transfer and friction characteristics of a square duct

Gogoi¹,

Triveni²,

Panua³

2017

IJHT

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Numerical investigations are carried out in a three dimensional square duct with wedge shaped rib and groove turbulators on its top and bottom wall to examine the effect of geometric parameters on turbulent forced convective heat transfer and friction characteristics. The study is perofrmed for geometric parameters for orientation of turbulators, groove height, rib gap, turbulator length and pitchat Reynolds number ranging from 10000 to 30000. The constant heat flux boundary condition is specified at the entire surfaces of the duct. The smooth duct is validated with the correlations established by Dittus Boelter, Gnielinski, Blasius and Petukhov. For this numerical assessment, k-ϵ turbulence model with enhanced wall treatment is used. The thermal enhancement is reported in terms of Nusselt number (Nu), Darcy friction factor (f) and thermal enhancement factor (TEF). Both the heat transfer and friction loss are found sensitive to the changes in the geometric parameters.

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Optimum thermal design of microchannel heat sink with triangular reentrant cavities

Cited by 197 publications

References 15 publications

Simple model for predicting microchannel heat sink performance and optimization

Simple model for predicting microchannel heat sink performance and optimization

Effects of Endwall Fillet and Bulb on the Temperature Uniformity of Pin-Fined Microchannel

Numerical investigation of 3D turbulent forced convective heat transfer and friction characteristics of a square duct

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