Experimental and numerical investigations of fluid flow and heat transfer in a bioinspired surface enriched microchannel

Dey, Prasenjit; Hedau, Gaurav; Saha, Sandip K.

doi:10.1016/j.ijthermalsci.2018.08.042

“…The microscopic morphology of the exposed parts of scales shows that some "crescent-like" ridge distribution in an orderly manner. Based on the structure, Dey et al [81] applied the fan-shaped scale in the microchannel. It indicated that the friction coefficient was reduced by up to 5% compared with that of the smooth microchannel.…”

Section: Scale Structurementioning

confidence: 99%

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

Zhu

¹

,

Li

²

,

Peng

³

et al. 2021

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Heat exchangers are general equipment for energy exchange in the industrial field. Enhancing the heat transfer of a heat exchanger with low pump energy consumption is beneficial to the maximum utilization of energy. The optimization design for enhanced heat transfer structure is an effective method to improve the heat transfer coefficient. Present research shows that the biomimetic structures applied in different equipment could enhance heat transfer and reduce flow resistance significantly. Firstly, six biomimetic structures including the fractal-tree-like structure, conical column structure, hybrid wetting structure, scale structure, concave-convex structure and superhydrophobic micro-nano structure were summarized in this paper. The biomimetic structure characteristics and heat transfer enhancement and drag reduction mechanisms were analyzed. Secondly, four processing methods including photolithography, nanoimprinting, femtosecond laser processing and 3D printing were introduced as the reference of biomimetic structure machining. Finally, according to the systemic summary of the research review, the prospect of biomimetic heat transfer structure optimization was proposed.

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“…With the development of microfabrication technology, one of the effective methods of using microchannel high power intensive microelectronic devices with high surface-to-body ratio is widely used in advanced engineering fields such as microelectronics, energy, military nuclear energy, and biochemical industry [1][2][3][4]. According to microchannel convective heat transfer theory, the heat transfer performance of microchannel heat sink can be improved by increasing the heat transfer surface area of the channel or improving the heat transfer performance of the fluid, or use boiling heat transfer, such as nanofluids [5][6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

NSGA-II-Based Microchannel Structure Optimization Problem Study

Wang

¹

2022

Scientific Programming

1

0

1

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A multiobjective genetic algorithm is used to optimize the structure of circular concave cavities and microchannels. The objective functions of thermal resistance and pumping power are constructed by the response plane approximation method according to the simulation results, and then a mathematical model of multiobjective genetic optimization with the structural parameters of microchannels as variables is established. The Pareto optimized solution sets of thermal resistance and pumping power are calculated by the nondominated ranking genetic algorithm NSGA-II, and the comprehensive heat transfer performance is evaluated by the enhanced heat transfer factor. The results show that the multivariate statistical coefficients R 2 of the thermal resistance and pumping power objective functions are 0.932 9 and 0.996 6, respectively, indicating the high accuracy of the fitted functions. The optimized channel structure ( e 1 = 0.036.8 mm , e 2 = 0.019.3 mm ) was used to achieve a more uniform temperature field distribution and better integrated heat transfer performance (enhanced heat transfer factor η = 1.23 ). When the thermal resistance is larger or the pump work is larger, the comprehensive heat transfer effect is not as good as the working condition when the thermal resistance and pump work are more uniform.

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“…Thus, intensive research in the field can help us to provide better designs of microchannels with the use of different types of working fluids. In the present scenario, various types of working fluids are being used to enhance the heat transfer performance of microchannels. Although, in most of the studies DI water was used as a coolant but more investigations are needed with other types of working substances like nanofluids, 9,11–13,50–53,58,62,70 emulsions, 44 supercritical fluids 21,30 and non-Newtonian fluids 10,23,26,46,48,49 for improving the heat transfer capacity of microchannels with various complex structures.…”

Section: Concluding Remarks and Prospectivementioning

confidence: 99%

Fluid flow characteristics and heat transfer performance in microchannel heat sinks: A review

Jan

¹

,

Butt

²

,

Hassan

³

2022

Proceedings of the Institution of Mechanical Engineers, Part E:

1

0

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The hydraulic and thermal characteristics of fluid flow in microchannels have advanced applications for the thermal management of electronic devices. There has been a wide development in the field of research concerning experimental procedures as well as numerical analysis of fluid flow in microchannels over the past decade. This article provides an overview of overall experimental and numerical studies in recent years to obtain clear understanding of various parameters affecting the fluid flow and heat transfer performance in microchannels. Furthermore, the article will come in handy for the researchers and scientists dealing with the basic correlations and some dimensionless parameters governing the hydrodynamic as well as thermic behavior of fluid flow in microchannels. This article underlines the recent studies on nanofluids in this specific area; additionally, it has encapsulated the influence on thermal performance by numerous designs of MCHS such as fins, ribs, etc. The latest research has revealed that there is a little agreement over the literature provided by experimental and theoretical analyses. Eventually, the conclusions drawn from this study and future prospective of research in this area have been thoroughly discussed.

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Experimental and numerical investigations of fluid flow and heat transfer in a bioinspired surface enriched microchannel

Cited by 34 publications

References 43 publications

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

Nature-Inspired Structures Applied in Heat Transfer Enhancement and Drag Reduction

NSGA-II-Based Microchannel Structure Optimization Problem Study

Fluid flow characteristics and heat transfer performance in microchannel heat sinks: A review

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