Effects of channel configuration on hydrothermal performance of the cylindrical mini-channel heat sinks

Khalifa, Mustafa Awaad; Jaffal, Hayder Mohammad

doi:10.1016/j.applthermaleng.2018.11.101

Cited by 23 publications

(4 citation statements)

References 61 publications

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“…(3) As the temperature changes, the physical properties of the cold plate material and fluid remain the same. Here are the governing equations, which follow the aforementioned hypothesis [31,33].…”

Section: Governing Equations and Boundary Conditionsmentioning

confidence: 99%

“…Their findings indicated that the heat sink that deep grooves, aligned arrangement bumps and a low Reynolds number are important for energy efficiency. Khalifa et al [31] analyzed the hydraulic and thermal efficiency of cylindrical heat sinks in line with constructal theory and the entransy principle. Spiral and wave channels have been recommended to improve heat-sink heat transmission over straight channels.…”

Section: Introductionmentioning

confidence: 99%

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Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

He,

Hu,

Zhang

et al. 2024

Processes

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Heat-transfer enhancement and entropy generation were investigated for a double-helical-type-channel heat sink with different rib structures set on the upper wall. Based on available experimental data, a series of simulations with various turbulence models were conducted to find the best numerical model. Five different rib structures were considered, which were diamond (FC-DR), rectangular (FC-RR), drop-shaped (FC-DSR), elliptic (FC-ER) and frustum (FC-FR). The research was carried out under turbulent flow circumstances with a Reynolds number range of 10,000–60,000 and a constant heat-flow density. The numerical results show that the thermal performance of the flow channel set with a rib structure is better than that of the smooth channel. FC-ER offers the lowest average temperature and the highest temperature uniformity, with a Nusselt number improvement percentage ranging from 15.80% to 30.77%. Overall, FC-ER shows the most excellent performance evaluation criteria and lowest augmentation entropy-generation number compared with the other reinforced flow channels.

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Section: Governing Equations and Boundary Conditionsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

He,

Hu,

Zhang

et al. 2024

Processes

View full text Add to dashboard Cite

show abstract

“…Numerous cooling schemes have been proposed to enhance the cooling technology for electronic equipment with high heat generation. The cooling schemes can be categorised into two approaches [4][5][6]. The first is to optimise the design of cooling devices to maximise their cooling performance.…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis of Fluid Flow and Heat Transfer Characteristics of Novel Microchannel Heat Sink

Yew Wai Loon,

Nor azwadi Che Sidik,

Yutaka Asako

2024

ARNHT

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Microchannel heat sinks have gained prominence in the field of thermal management, offering compact and efficient solutions for dissipating heat flux from high performance electronic devices. Escalating heat flux in modern electronic devices, such as those found in telecommunication equipment, industrial automation equipment, solar devices, and data centre servers has driven the continuous development of microchannel heat sink to achieve efficient thermal management. The critical challenge in thermal management for these devices is to develop a microchannel that enhances heat transfer performance and minimises pressure drop. Heat transfer and pressure drop are two competing factors that determine the practicability of the design for real world application. Improvement in heat transfer performance usually results in an increase in pressure drop and pumping power. This study addresses the challenges of designing microchannel through comprehensive numerical analysis of fluid flow and heat transfer characteristics of a novel design that combines ribs, secondary channels, and tertiary channels. The numerical results showed that the novel microchannel design achieves a favourable balance between heat transfer and pressure drop, demonstrating its potential to be used in application where high heat transfer and efficiency are paramount. To assess the performance of the microchannels, thermal resistance, a measure of system’s resistance to heat transfer is used. At the same pumping power, thermal resistance in the new design is consistently lower compared to other designs.

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“…The results outcome show improvement performance for three configurations compared to conventional rectangular microchannel. Mustafa et al 44 examined the experimental and numerical work. A comparison between three different cylindrical microchannel, the first on having straight, second having parallel wavy and third having helical configuration.…”

Section: Introductionmentioning

confidence: 99%

Improving the performance of mini-channel heat sink by using wavy channel and different types of nanofluids

Saadoon

Ali

Hamzah

et al. 2022

Sci Rep

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The combination of nano fluid and changing cross-section mini-channel heat sink effects have become a remarkable choice for the use of thermal devices such as miniature electronic devices to be effectively cooled. In this paper, the comparison of three dimensional straight and wavy channel configuration with using different types nano fluids are numerically investigated. The effects of wave amplitude and A particular type of volume fraction of (Copper Oxide CuO, Dimond Al2O3, Iron Oxide Fe3O4, Titanium Oxide TiO2 and Silver Ag-nano fluids are offered. Three amplitudes of waves (0.15 mm, 0.2 mm and 0.25 mm) and Reynold’s number from 200 to 1000 and concentration volume varieties from 0 to 0.075 are used. The effect on thermal resistance, pressures drop, factor of friction of the mini channel is displayed. It is observed that the mini-channel sink's heat transfer efficiency is greatly enhanced compared to the straight channel in an event of adding distilled water as accoolant. The results indicate that nano fluid and wavy mini-channel can boost the heat sink's hydrothermal efficiency and Ag- water nano fluid in term of heat transfer, it outperforms other nanofluids an enhancement in the Nusselt number reached to 54% at concentration volume 0.075.

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Effects of channel configuration on hydrothermal performance of the cylindrical mini-channel heat sinks

Cited by 23 publications

References 61 publications

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

Performance Evaluation of a Double-Helical-Type-Channel Reinforced Heat Sink Based on Energy and Entropy-Generation Analysis

Numerical Analysis of Fluid Flow and Heat Transfer Characteristics of Novel Microchannel Heat Sink

Improving the performance of mini-channel heat sink by using wavy channel and different types of nanofluids

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