Optimization of fractal-like branching microchannel heat sinks for single-phase flows

Heymann, Douglas; Pence, Deborah V.; Narayanan, Vinod

doi:10.1016/j.ijthermalsci.2010.01.015

Cited by 40 publications

(7 citation statements)

References 12 publications

(19 reference statements)

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“…These branched structures therefore have been of interest to be used for various applications. Some examples include, microfluidic mixers and networks 1 , 2 , capillary pump 3 , synthetic leaf 4 , non-transparent solar electrodes 5 , and most importantly, heat exchangers 6 , 7 , mass transporters 8 , 9 , and vascular systems 2 , 10 – 12 . Tree-like structure with integrated source and sink segments have been demonstrated to be mechanically strong and at the same time energy efficient in flow and mass transport than any other design configuration 13 , 14 .…”

Section: Introductionmentioning

confidence: 99%

Viscous Fingering in Multiport Hele Shaw Cell for Controlled Shaping of Fluids

Islam

Gandhi

2017

Sci Rep

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The pursuit of mimicking complex multiscale systems has been a tireless effort with many successes but a daunting task ahead. A new perspective to engineer complex cross-linked meshes and branched/tree-like structures at different scales is presented here. Control over Saffman-Taylor instability which otherwise randomly rearranges viscous fluid in a ‘lifted Hele-Shaw cell’ is proposed for the same. The proposed control employs multiple-ports or source-holes in this cell, to spontaneously shape a stretched fluid film into a network of well defined webs/meshes and ordered multiscale tree-like patterns. Use of multiple ports enables exercising strong control to fabricate such structures, in a robust and repeated fashion, which otherwise are completely non-characteristic to viscous fingering process. The proposed technique is capable of fabricating spontaneously families of wide variety of structures over micro and very large scale in a period of few seconds. Thus the proposed method forms a solid foundation to new pathways for engineering multiscale structures for several scientific applications including efficient gas exchange, heat transport, tissue engineering, organ-on-chip, and so on. Proposal of multi-port Hele-Shaw cell also opens new avenues for investigation of complex multiple finger interactions resulting in interesting fluid patterns.

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Section: Introductionmentioning

confidence: 99%

Viscous Fingering in Multiport Hele Shaw Cell for Controlled Shaping of Fluids

Islam

Gandhi

2017

Sci Rep

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“…Furthermore, aspect ratio of channels played a very important role in the hydraulic and thermal characteristics. Fractal-like branching flow networks in disk-shaped heat sinks were numerically optimized to minimize pressure drop and flow power [14]. Optimization was performed using a direct numerical search, gradient-based optimization, and genetic algorithm.…”

Section: Accepted Manuscriptmentioning

confidence: 99%

Conjugate heat transfer in fractal tree-like channels network heat sink for high-speed motorized spindle cooling

Xia

Lai

et al. 2015

Applied Thermal Engineering

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“…The main concerns are associated with the increase in operating temperature of heatgenerating systems such as electronic components where heat is generated within the body or induced into the outer surfaces of the piece. Therefore, numerous researchers have focused their attention on generating the best architecture of cooling routes for fluid flow [1][2][3][4][5][6][7][8][9][10][11][12] or optimal design of conduction routes fins, [13][14][15][16][17][18] cavities [19][20][21] and high-conductivity inserts [22][23][24][25][26][27][28][29][30][31][32] embedded into heat-generating packages. For example, Pence 4 proposed fractal-like branching channel networks for minimized pumping power and wall temperature in microchannel heat sinks.…”

Section: Introductionmentioning

confidence: 99%

Essential reformulations for optimization of highly conductive inserts embedded into a rectangular chip exposed to a uniform heat flux

Hajmohammadi

Moulod

Shariatzadeh

et al. 2013

Proceedings of the Institution of Mechanical Engineers, Part C:

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Optimization of a highly conductive insert embedded into a heated rectangular chip has been lately investigated. The role of the insert was to gather the heat current within the chip body and remove it to a minimum temperature heat sink. The central goal of this paper is to invoke several reconsiderations, which result in excessive reduction of the peak temperature in the heated chip in comparison with the lowest peak temperature existed in the archival literature. It is proved that for the configuration under study with its bottom surface receiving a heat flux, the branching patterns of the insert must be avoided, in case the appropriate revisions in the architecture (width, location and cross section area) of the simple branchless patterns are considered. An analytical solution for predicting the peak temperatures in the chip is also addressed. It is demonstrated that under the same volume fraction and thermal conductivity of the cooling insert, the peak temperature is reduced to 2.9℃, which is 94% below the lowest temperature existed in the archival literature, which was around 50℃.

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Optimization of fractal-like branching microchannel heat sinks for single-phase flows

Cited by 40 publications

References 12 publications

Viscous Fingering in Multiport Hele Shaw Cell for Controlled Shaping of Fluids

Viscous Fingering in Multiport Hele Shaw Cell for Controlled Shaping of Fluids

Conjugate heat transfer in fractal tree-like channels network heat sink for high-speed motorized spindle cooling

Essential reformulations for optimization of highly conductive inserts embedded into a rectangular chip exposed to a uniform heat flux

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