Thermal enhancement of microchannel heat sink using rib surface refinements

Ahmad, Faraz; Cheema, Taqi Ahmad; Rehman, M. Mohib Ur; Abbas, Ahmad; Park, Cheol Woo

doi:10.1080/10407782.2019.1673104

Cited by 31 publications

(13 citation statements)

References 24 publications

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“…Therefore, some new designs have been proposed to ease the foregoing disadvantages for microchannel heat sinks. [15][16][17][18][19] For example, the wavy microchannels heat sinks with different geometric sizes were proposed by Abdulhaleem et al 15 and Zhu et al, 16 and the results indicated that the wavy microchannel exhibited good cooling performance. Ahmad et al 17 designed a novel microchannel with surface optimization by embedding some ribs.…”

Section: Introductionmentioning

confidence: 99%

“…(b) The parallel microchannel yields comparatively nonuniform temperature distribution on the surface. Therefore, some new designs have been proposed to ease the foregoing disadvantages for microchannel heat sinks 15‐19 . For example, the wavy microchannels heat sinks with different geometric sizes were proposed by Abdulhaleem et al 15 and Zhu et al, 16 and the results indicated that the wavy microchannel exhibited good cooling performance.…”

Section: Introductionmentioning

confidence: 99%

“…For example, the wavy microchannels heat sinks with different geometric sizes were proposed by Abdulhaleem et al 15 and Zhu et al, 16 and the results indicated that the wavy microchannel exhibited good cooling performance. Ahmad et al 17 designed a novel microchannel with surface optimization by embedding some ribs. Xu and Wu 18 conducted the experimental validation for various pin‐fin layouts microchannels.…”

Section: Introductionmentioning

confidence: 99%

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Thermal performance and entropy generation of single‐layer and double‐layer constructal Y‐shaped bionic microchannel heat sinks

et al. 2021

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A kind of Y-shaped bionic microchannel (YBMC) heat sink is proposed and designed based on bionic concept and constructal law. A discontinuous Galerkin finite element method is applied to solve incompressible steady laminar flow and heat transfer in microchannels, and an optimal design strategy for geometrical parameters of the double-layer microchannels with counterflow arrangement is adopted. Results reveal that the proposed YBMC configuration provides much better thermal performance and lower total pressure drop subject to the same mass flow rate when compared to microchannels with rectangular straight configuration. Yet the YBMC design offers a more uniform temperature distribution along the heated surface. By using the principle of entropy generation, the degree of irreversible loss of the Y-shaped bionic cases is much less than those of the rectangular case. The pressure rises at the bifurcations of the first-stage, and the second-stage is related to the restart of boundary layer, confirming that the YBMC exhibits high thermal performance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Thermal performance and entropy generation of single‐layer and double‐layer constructal Y‐shaped bionic microchannel heat sinks

et al. 2021

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“…of MCHS [8] and disturbing the flow of fluid through a change in the periphery of the channel by introducing different kinds of obstructions on walls like cavities, ribs dimples, and groves, etc. to disturb the flowing fluid [9,10]. Furthermore, many computational and experimental studies were conducted to determine the effects of ribs on the thermo-fluid properties of the modified MCHS.…”

Section: Introductionmentioning

confidence: 99%

Thermo-Fluid Characteristics of Microchannel Heat Sink With Multi-Configuration NACA 2412 Hydrofoil Ribs

et al. 2021

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In this study, hydrofoil ribs having NACA 2412 profile were mounted in a novel way at all walls of microchannel heat sink with various configurations to improve its thermo-hydraulic characteristics. The various configurations include comparison between staggered and aligned arrangements, and the variation of rib spacing between two hydrofoils (Sr = 200-600 µm) at a constant cord length (Cr = 400 µm). The performance of various configurations were compared with each other and with smooth channel using parameters like friction factor (f), Nusselt number (Nu), and overall performance is determined by thermal enhancement factor (η). The results showed that the best performance is achieved by the configuration where rib spacing became equal to cord length (Sr = 400 µm). Moreover, staggered configuration performed better than aligned configuration.

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“…Surface‐modification techniques have been widely utilized for spatial control of cell behavior . It has been proved that surface micro‐topology at the nanoscale directs the cell behavior, including adhesion, migration, and proliferation .…”

Section: Introductionmentioning

confidence: 99%

Nanostructured Multilayer Films Assembled from Poly(dopamine)‐Coated Carbon Nanotubes for Controlling Cell Behavior

Ren

Zhang

et al. 2017

ChemNanoMat

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Nano‐topographic surfaces have been used as an effective tool to control cell behavior such as adhesion and proliferation. In this study, multilayer films with nano‐topographic features were fabricated by alternatively assembling poly(l‐lysine) (PLL) and poly(dopamine)‐coated carbon nanotubes (CNTs@PDA) layers. The growth of PLL/CNTs@PDA film presented a perfect linear relationship with the number of bilayers. A nanostructured morphology with interpenetrating CNT networks was observed by scanning electron microscopy (SEM). Adhesion and proliferation of endothelial cells (ECs) and smooth muscle cells (SMCs) on the PLL/CNTs@PDA multilayer films have been evaluated. The films support initial adhesion of both ECs and SMCs. Interestingly, the PLL/CNTs@PDA multilayer films were found to promote proliferation of SMCs and inhibited proliferation of ECs. Further, pheochromocytoma (PC12) cells were employed to evaluate the influence of PLL/CNTs@PDA multilayer films on the outgrowth of synapses. We found that the nanostructured surface significantly promoted the synapses of PC12 cell growth and formation. Our findings suggest that cytophilic surfaces with the nanostructured morphology have diverse effects on different cells, which sheds light on new design of biomaterial surfaces in cell‐based applications.

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Thermal enhancement of microchannel heat sink using rib surface refinements

Cited by 31 publications

References 24 publications

Thermal performance and entropy generation of single‐layer and double‐layer constructal Y‐shaped bionic microchannel heat sinks

Thermal performance and entropy generation of single‐layer and double‐layer constructal Y‐shaped bionic microchannel heat sinks

Thermo-Fluid Characteristics of Microchannel Heat Sink With Multi-Configuration NACA 2412 Hydrofoil Ribs

Nanostructured Multilayer Films Assembled from Poly(dopamine)‐Coated Carbon Nanotubes for Controlling Cell Behavior

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