Thermo hydraulic performance analysis of twisted sinusoidal wavy microchannels

Hasis, Fahd Bin Abdul; Krishna, P. Mohan; Aravind, G. P.; Deepu, M.; Shine, S. R.

doi:10.1016/j.ijthermalsci.2018.02.018

Cited by 25 publications

(2 citation statements)

References 35 publications

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“…where µ is dynamic viscosity, P is pressure, and ⇀ F is momentum source term. When PCM undergoes a liquid phase change, the expression of dynamic viscosity µ is as follows [59,60]:…”

Section: Heat Transfer Mathematical Modelmentioning

confidence: 99%

Structure Design and Heat Transfer Performance Analysis of a Novel Composite Phase Change Active Cooling Channel Wall for Hypersonic Aircraft

Li,

Zhao,

et al. 2024

Micromachines

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Efficient and stable heat dissipation structure is crucial for improving the convective heat transfer performance of thermal protection systems (TPSs) for hypersonic aircraft. However, the heat dissipation wall of the current TPS is limited by a single material and structure, inefficiently dissipating the large amount of accumulated heat generated during the high-speed maneuvering flight of hypersonic aircraft. Here, a convection cooling channel structure of TPS is proposed, which is an innovative multi-level structure inspired by the natural honeycomb. An active cooling channel (PCM-HC) is designed by using a variable-density topology optimization method and filled with phase change material (PCM). Numerical simulations are used to investigate the thermal performance of the PCM-HC wall, focusing on the influence of PCM properties, structural geometric parameters, and PCM types on heat transfer characteristics. The results demonstrate that the honeycomb-like convection cooling channel wall, combined with PCM latent heat of phase change, exhibits superior heat dissipation capability. With a heat flux input of 50 kW/m2, the maximum temperature on the inner wall of PCM-HC is reduced by 12 K to 20 K. Different PCMs have opposing effects on heat transfer performance due to their distinct thermophysical properties. This work can provide a theoretical basis for the design of high-efficiency cooling channel, improving the heat dissipation performance in the TPS of hypersonic aircraft.

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“…where µ is dynamic viscosity, P is pressure, and ⇀ F is momentum source term. When PCM undergoes a liquid phase change, the expression of dynamic viscosity µ is as follows [59,60]:…”

Section: Heat Transfer Mathematical Modelmentioning

confidence: 99%

Structure Design and Heat Transfer Performance Analysis of a Novel Composite Phase Change Active Cooling Channel Wall for Hypersonic Aircraft

Li,

Zhao,

et al. 2024

Micromachines

View full text Add to dashboard Cite

show abstract

“…Several researchers investigated different geometric configurations of microchannel heat sinks such as rectangular [21][22][23], trapezoidal [24][25], triangular [26] and circular [27][28][29]. However, a small number of experimental studies have shown that other innovative forms, fan-shaped cavities [30], corrugated [31,32], tortuous [33,34] and serpentine [35] channels could provide interesting performance benefits.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of a Micro Heat Exchanger in Electronic Cooling Applications

Mokrane

2021

Journal of Thermal Engineering

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To operate under normal conditions and depending on the technology used, the electronic components must be at a temperature below 80 to 85°C. Several cooling systems were investigated with the aim of improving the heat transfer process in this kind of applications. Single-phase liquid cooling systems, which mainly consist of a hot watercooled micro-heat exchanger, provide an efficient approach to dissipate heat flows. In the present study, numerical and experimental investigations were carried out to study the characteristics of laminar flow and forced convective heat transfer in micro-channels. The inlet temperature of cooling water ranged from 25 to 65°C, the Reynolds number of water flow varied from 250 to 2000, and the electronic power supply component was set at 50, 80 and 120 W. The results showed that the micro heat exchanger was able to dissipate around 70 to 78% of the heat released by the electronic component. As regards the numerical results, it was observed that the inlet water temperature of 55ºC kept a heat source up to 80 W for a temperature source below the critical value of 80ºC.

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The role of microchannel geometry selection on heat transfer enhancement in heat sinks: A review

2021

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Extensive research has been carried out by researchers for improving the thermal efficiency of the microchannel. There are various types of methodologies that have been proposed by authors for different geometry and fluid flow. The use of microchannel in the miniature heat exchangers and microchannel heat sink (MCHS) have taken the science of heat transfer to an another level for which the field of electronic device cooling, aerospace applications, automobile sectors, biomedical engineering, and chemical engineering sectors are being keen toward further development of the technology. Since 3 decades, the microchannel has been tested numerically, experimentally, and analytically for establishing the theories of hydraulic and thermal efficiency during fluid flow. Improper geometry selection of microchannel may lead to carry various losses such as pressure drop, friction factor, wall shear stress, and temperature jump. Available investigations and results have been reviewed immensely in this paper to give a clear prospective for further research in selecting a proper channel geometry.

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Thermo hydraulic performance analysis of twisted sinusoidal wavy microchannels

Cited by 25 publications

References 35 publications

Structure Design and Heat Transfer Performance Analysis of a Novel Composite Phase Change Active Cooling Channel Wall for Hypersonic Aircraft

Structure Design and Heat Transfer Performance Analysis of a Novel Composite Phase Change Active Cooling Channel Wall for Hypersonic Aircraft

Performance Analysis of a Micro Heat Exchanger in Electronic Cooling Applications

The role of microchannel geometry selection on heat transfer enhancement in heat sinks: A review

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