☆ 4.6 Review

An overview of heat transfer enhancement methods in microchannel heat sinks

CHEMICAL ENGINEERING SCIENCE (2023)

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Article Thermodynamics

Parametric study and optimization of microchannel heat sinks with various shapes

Haluk Anil Kose et al.

Summary: This study numerically investigates laminar single-phase fluid flow and conjugate heat transfer for three different shapes of microchannel heat sinks using Computational Fluid Dynamics (CFD). The study reveals the optimal geometric design variables for efficient microchannel heat sink designs. The results show that the rectangular microchannel configuration has the highest thermal and hydrodynamic performance among the three configurations.

APPLIED THERMAL ENGINEERING (2022)

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Article Thermodynamics

Study of hydrothermal transport phenomena and performance characteristics for a flow through a diamond (diverging-converging) microchannel

Sandeep Goli et al.

Summary: This study investigates the hydrothermal transport phenomena and performance characteristics of a single-phase laminar flow through a diamond microchannel. The Nusselt number is found to be directly related to the divergence-convergence angle and inversely related to the width ratio. Results also show that the diamond microchannel exhibits better hydrothermal and thermodynamic performance compared to a uniform microchannel.

THERMAL SCIENCE AND ENGINEERING PROGRESS (2022)

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Article Thermodynamics

Experimental study on two-phase pressure drop and flow boiling heat transfer in a micro pin fin channel heat sink under constant heat flux

Ki Moon Jung et al.

Summary: Flow boiling experiments in a staggered array micro pin fin channel heat sink with deionized water showed a decrease in boiling heat transfer as vapor quality increased up to 0.043. The heat transfer coefficient was dependent on mass flux, and pressure drop increased with increasing mass flux.

EXPERIMENTAL HEAT TRANSFER (2021)

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Review Computer Science, Interdisciplinary Applications

Latest Advancements in Heat Transfer Enhancement in the Micro-channel Heat Sinks: A Review

K. Naga Ramesh et al.

Summary: This article provides information on experimental and numerical studies on heat transfer and its enhancement in micro-scale cooling devices, focusing on heat transfer enhancement techniques in microchannels and the parameters affecting heat transfer rate. Recent studies on improving microchannel heat sink performance through geometry modifications, jet impingement, using Nano fluids, flow boiling, and Magneto-hydrodynamics are thoroughly discussed in this article.

ARCHIVES OF COMPUTATIONAL METHODS IN ENGINEERING (2021)

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Article Materials Science, Ceramics

Numerical analysis of a liquid metal cooled mini channel heat sink with five different ceramic substrates

Md Tanbir Sarowar

Summary: Recent advancements in MEMS have led to an increasing demand for extracting large heat flux from a small surface area. The use of mini/microchannel heat sinks and liquid metals as working fluids show promising improvements in cooling mechanisms. Non-metallic materials, such as ceramic materials, may offer a solution to the corrosion challenges faced by metal-based heat sinks. In this study, an aluminum nitride heat sink demonstrated superior performance, while gallium indium was found to be the optimal coolant material.

CERAMICS INTERNATIONAL (2021)

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Article Engineering, Chemical

Simulation of the hydrodynamics and mass transfer in a falling film wavy microchannel

Siyuan Chen et al.

Summary: Research shows that the liquid falling film in wavy microchannels exhibits waveform distribution, which enhances gas-liquid mass transfer, especially through the formation of internal eddy flow. Compared to flat microchannels, the CO2 absorption efficiency in water in wavy microchannels is improved by over 41%.

CHINESE JOURNAL OF CHEMICAL ENGINEERING (2021)

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Article Thermodynamics

Thermal performance analysis of multi-objective optimized microchannels with triangular cavity and rib based on field synergy principle

Peitao Yao et al.

Summary: The study proposed a new microchannel structure to enhance heat transfer efficiency, and conducted multi-objective optimization to obtain the optimal design, showcasing the dominance of convective heat transfer over conduction and heat loss, with moderate thermal resistance and pumping power leading to the best heat transfer characteristics.

CASE STUDIES IN THERMAL ENGINEERING (2021)

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Article Thermodynamics

Experimental investigation of flow boiling performance in sinusoidal wavy microchannels with secondary channels

D. D. Ma et al.

Summary: The sinusoidal wavy microchannels with secondary channels (SWSC) show better heat removal performance in flow boiling studies compared to conventional microchannels, thanks to increased bubble nucleation induced by enlarged surface area and continuous development of thin liquid film due to the introduction of secondary channels. However, the SWSC microchannels suffer from a higher pressure drop penalty.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Bio-coated surfaces with micro-roughness and micro-porosity: Next generation coatings for enhanced energy efficiency

Soroush Niazi et al.

Summary: This study developed a microbial bio-coating surface modification technique for phase change cooling applications, showing great potential in enhancing efficiency and energy savings in boiling heat transfer and air-conditioning applications.

ENERGY (2021)

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Article Thermodynamics

Enhanced flow boiling performance in high-aspect-ratio groove-wall microchannels

Xiao Cheng et al.

Summary: The novel high-aspect-ratio groove-wall microchannel shows improved heat transfer performance and reduced pressure drop compared to conventional plain-wall microchannels, especially at higher inlet subcooling conditions. The groove-wall design helps to enhance critical heat flux and suppress boiling instabilities in two-phase flow, providing potential for more efficient thermal management systems.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Phase separation evaporator using pin-fin-porous wall microchannels: Comprehensive upgrading of thermal-hydraulic operating performance

Xiongjiang Yu et al.

Summary: A new concept of phase-separation evaporator is proposed in this study, where flow instabilities can be suppressed by using gradient pinfin-porous wall microchannels. The high-frequency release of vapor bubbles and stable heat transfer in bare channels enable stable heat transfer under different operating parameters.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Enhancement of flow boiling heat transfer using heterogeneous wettability patterned surfaces with varying inter-spacing

Wei-Ting Hsu et al.

Summary: The study showed that changing the inter-spacing of heterogeneous wettability-patterned surfaces slightly enhanced the heat transfer coefficient. Heterogeneous wettability-patterned surfaces significantly influenced the flow boiling heat transfer performance, with a significant increase in critical heat flux and markedly higher heat transfer coefficient compared to regular Si surfaces.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Effect of aspect ratio on flow boiling characteristics in microchannels

Ali H. Al-Zaidi et al.

Summary: The study experimentally investigated the influence of channel aspect ratio on flow boiling characteristics of HFE-7100 in copper multi-microchannel heat sinks. It found that increasing channel aspect ratio led to higher heat transfer coefficient and lower flow boiling pressure drop, but the heat transfer rate was higher in the heat sink with the smallest aspect ratio due to its larger surface area.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Engineering, Chemical

Two-phase analysis of nano fl uid fl ow within an innovative four-layer microchannel heat exchanger: Focusing on energy ef fi ciency principle

Nima Mazaheri et al.

Summary: The study shows that using nanofluid in a four-layer microchannel heat exchanger can significantly enhance the overall heat transfer coefficient without increasing pressure drop. An increase in channel number leads to a more severe disruption in the thermal boundary layer, resulting in improved heat transfer performance.

POWDER TECHNOLOGY (2021)

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Article Thermodynamics

Optimization of porous fin location and investigation of porosity and permeability effects on hydro-thermal behavior of rectangular microchannel heat sink

D. Sathish Kumar et al.

Summary: Incorporating porous fins into a rectangular microchannel heat sink can improve thermal performance, especially when the porosity is 0.4 and permeability is 10-8 m2. The study also shows the importance of slip length in enhancing performance and optimizing fin location for better heat transfer characteristics.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Thermo-hydraulic performance of nanofluids in a bionic heat sink

Jinghua Tang et al.

Summary: The study focuses on the development of a bionic surface based on the wing structure of the dragon louse for thermal management in electronic components, as well as the behavior of Fe3O4-water nanofluids under magnetic field. Various factors affecting heat transfer, such as nanofluid concentration, Reynolds number, magnetic field angle, and intensity, were considered. Results show that the bionic surface has a significant drag reduction effect and the magnetic field has a notable influence on CPU cooling.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Hydrothermal performance of single and hybrid nanofluids in Left-Right and Up-Down wavy microchannels using two-phase mixture approach

Mohammad Jamshidmofid et al.

Summary: The study investigates the hydrothermal characteristics of three types of nanofluid in Left-Right and Up-Down wavy microchannels, showing that the impact of nanofluids on convective heat transfer and temperature uniformity is more pronounced in the Up-Down microchannel.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Visualization study of flow boiling characteristics in open microchannels with different wettability

Qi Zhao et al.

Summary: This study investigated the effect of wettability on two-phase flow boiling in open microchannels, finding that different wettability properties have varying impacts on heat transfer and pressure drop under different heat flux and mass flow conditions. Microchannels with superhydrophobic properties exhibited the highest pressure drop due to vapor acceleration loss, while those with superhydrophilic properties showed excellent heat transfer performance and rewetting capacity.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Review Thermodynamics

Review on high heat flux flow boiling of refrigerants and water for electronics cooling

Behnam Parizad Benam et al.

Summary: This article explores the heat removal challenges in high heat flux devices and the application of flow boiling for effective cooling. It discusses active and passive methods for improving flow boiling heat transfer, and summarizes studies on working fluids, channel sizes, and improvement methods in related literature.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Experimental investigation of the influence of boiling-induced ageing on high heat flux flow boiling in a copper microchannel

Rishi L. Ramakrishnan et al.

Summary: This study experimentally investigated the effect of copper surface ageing on heat transfer and critical heat flux during flow boiling. The results showed that ageing significantly reduces the heat transfer coefficient on the copper surface, while having an insignificant impact on the critical heat flux. Surface morphology and wettability of copper were found to change after ageing.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Effect of circular pin-fins geometry and their arrangement on heat transfer performance for laminar flow in microchannel heat sink

M. P. Vasilev et al.

Summary: A computational simulation was conducted to compare the performance of different types of microchannel heat sink models equipped with circular pin fins, finding that thermal resistance largely depends on pin height and the optimal pin placement step also varies for different pin heights.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Review Chemistry, Physical

Research on passive cooling of electronic chips based on PCM: A review

Weisan Hua et al.

Summary: This paper reviews the theoretical basis and application progress of phase change materials (PCMs) in chip thermal management, including different types of PCMs, non-embedded cooling solutions, and research methods of embedded cooling.

JOURNAL OF MOLECULAR LIQUIDS (2021)

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Article Thermodynamics

Improving thermal performance of microchannels by combining rectangular pin with chamber

S. M. Hassani et al.

Summary: The study proposed and investigated a combination design of rectangular pin and chamber to enhance the performance of microchannels, resulting in increased heat transfer coefficient with a penalty in pressure drop. The positions of pins and chambers have significant impacts on the overall performance of the microchannel.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Experimental study on micro-encapsulated phase change material slurry flowing in straight and wavy microchannels

Meng Chen et al.

Summary: An experimental study was conducted to investigate the flow and heat transfer performances of Micro-encapsulated phase change material slurry (MPCS) in straight and wavy microchannels. It was found that the pressure drop increased with more micro-encapsulated phase change material (MEPCM) adding to the fluid, especially in wavy microchannels. MPCS displayed superior heat transfer performance during phase change region compared to water, and the heat transfer in wavy channels was enhanced by 1.29 times compared to straight channels, and 1.7 times compared to pure water.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Effect of shape and arrangement of micro-structures in a microchannel heat sink on the thermo-hydraulic performance

A. Rajalingam et al.

Summary: In this study, micro-pillars and micro-blind holes were introduced into the microchannel heat sink to enhance heat transfer coefficient and reduce interface temperature. Three computational analyses were performed to optimize the shape and arrangement of these micro-structures. Circular blind holes showed the highest overall performance, while elliptical pillars exhibited the best thermo-hydraulic performance.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Experimental study of flow boiling performance of open-ring pin fin microchannels

Daxiang Deng et al.

Summary: A new type of open-ring pin fin microchannels (ORPFM) was proposed for advanced microchannel heat sinks, with inline arrangement showing improved boiling heat transfer, reduced pressure drop, and more stable flow boiling process at high heat fluxes through experimental investigation.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Overall numerical simulation and experimental study of a hybrid oblique-rib and submerged jet impingement/microchannel heat sink

H. C. Cui et al.

Summary: Two submerged jet impingement/microchannel heat sink (JIMHS) models, SJIMHS and OJIMHS, were proposed and their heat transfer and flow characteristics were investigated through numerical simulation and experiment. The results show that OJIMHS has a more uniform and lower temperature distribution on its heat transfer surface compared to SJIMHS, with an average convective heat transfer coefficient about 20% higher.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Improved flow boiling performance in high-aspect-ratio interconnected microchannels

Xiao Cheng et al.

Summary: High aspect ratio microchannels have the advantage of dissipating more heat per base area, but can experience flow boiling instability due to narrower channel width. By adding micro connection slots in interconnected microchannels, flow boiling instability can be effectively suppressed, leading to significant heat transfer enhancement.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Enhanced flow boiling in microchannels by incorporating multiple micro-nozzles and micro-pinfin fences

Wenming Li et al.

Summary: The study introduces a new microchannel configuration by combining capillary micro-pinfin fences and multiple micro-nozzles to enhance flow boiling performance, achieving significant improvements in heat transfer on both DI-water and HFE-7100. Especially, a remarkable enhancement in critical heat flux (CHF) has been achieved, showing promising potential for high-power electronics cooling applications.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Flow boiling in microchannels enhanced by parallel microgrooves fabricated on the bottom surfaces

Congcong Ren et al.

Summary: This study focuses on enhancing flow boiling performance in microchannels without using inlet restrictors, by fabricating parallel microgrooves on the bottom surface of the channels. The microgrooves effectively manage two-phase flow instabilities and enable high-frequency rewetting, enhancing heat transfer rates and delaying critical heat flux conditions. Through visualization studies, it was found that the microgrooves can significantly improve thin film evaporation and overall heat transfer coefficients in the microchannels.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Conjugate effect on flow boiling instability in wavy microchannel

Nishant Tiwari et al.

Summary: A three-dimensional numerical study on two-phase flow boiling in a rectangular microchannel with wavy vertical wall configuration was conducted for heat dissipation in high flux electronics devices. The study compared straight and wavy microchannels and investigated the behavior of bubble growth rate and two-phase flow pattern in both. The results showed that smaller bubbles were formed in the wavy microchannel while confined and elongated bubbles were formed in the straight microchannel, leading to flow clogging and premature dryout.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Fluid flow and heat transfer characteristics of microchannel heat sinks with different groove shapes

Qifeng Zhu et al.

Summary: Different groove shapes were studied to improve the overall performance of microchannel heat sinks, with the conclusion that arranging grooves on channel sidewalls can greatly enhance performance. Triangular grooves were found to be the optimal structure within a certain range of Reynolds numbers, while water-droplet shaped grooves offered significant advantages at higher Reynolds numbers.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Thermodynamics

Numerical studies on the hydraulic and thermal performances of trapezoidal microchannel heat sink

Jian Song et al.

Summary: This study numerically investigates the hydraulic and thermal performances of trapezoidal microchannel heat sinks, revealing that pressure drop increases with decreasing small-to-large end width ratio. Only TMCHS configurations with PCPFLI and RCCFLI show improved thermal performances as the ratio decreases, with lower thermal resistance and more uniform temperature distribution. The TMCHS with RCCFLI configuration exhibits the best overall thermal performance among the six configurations studied.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Thermodynamics

Effect of groove depth on hydrothermal characteristics of the rectangular microchannel heat sink

Krishanu Kumar et al.

Summary: A three-dimensional numerical simulation was conducted to study fluid flow and heat transfer characteristics in a rectangular microchannel heat sink with arc grooves. Results show that adding grooves can enhance heat transfer in the microchannel but may increase the Poiseuille number; groove depth affects the performance of the microchannel at low Reynolds numbers, but has no significant effect on performance enhancement at high Reynolds numbers; groove configuration also plays a major role in enhancing the performance of the microchannel.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Engineering, Chemical

Analysis of entropy generation of ferrofluid flow in the microchannel with twisted porous ribs: The two-phase investigation with various porous layers

Amirhosein Mosavi et al.

Summary: The study focused on the thermal performance of microchannels with twisted porous ribs and investigated the impact of Reynolds number and nanoparticle volume fraction. Results showed that inserting porous ribs increased local Reynolds number and circulation of nanofluid flow, leading to higher heat transfer coefficient. Increasing the number of porous layers enhanced heat transfer coefficient but also increased friction factor. Triple layers of twisted porous ribs in microchannels showed better performance in total entropy generation.

POWDER TECHNOLOGY (2021)

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Review Green & Sustainable Science & Technology

Review of heat transfer enhancement techniques for single phase flows

Mohamed H. Mousa et al.

Summary: Enhancing heat transfer between fluids and walls is crucial for improving performance. By utilizing features that enhance heat transfer, equipment size can be reduced, costs minimized, and safety risks mitigated.

RENEWABLE & SUSTAINABLE ENERGY REVIEWS (2021)

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Article Thermodynamics

Thermo-hydraulic performance of wavy microchannel heat sink with oblique grooved finned

Yousef Alihosseini et al.

Summary: A combination of wavy and oblique grooved microchannel patterns was investigated to improve the performance of microchannel heat sinks. Type-2 showed the best heat transfer performance and pressure drop behavior, with an eta value close to 2.5.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Effects of truncated and offset pin-fins on hydrothermal performance and entropy generation in a rectangular microchannel heat sink with variable fluid properties

Yongqi Lan et al.

Summary: The study investigates the influence of truncated and offset pin-fins in a rectangular microchannel on hydrothermal performance and entropy generation. Results show that increasing pin-fin height leads to higher thermal enhancement and flow resistance, while increasing pin-fin offset value can enhance heat transfer but too large offset value decreases thermal enhancement.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

An experimental investigation of flow boiling characteristics in silicon-based groove-wall microchannels with different structural parameters

Xiao Cheng et al.

Summary: This study experimentally investigated the effects of structural parameters of groove-wall microchannels on flow boiling heat transfer performance, revealing that channel aspect ratio significantly affects the heat transfer coefficient, while varying groove spacing ratios or groove depths have moderate effects on the heat transfer coefficient.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

The experimental study of the heat ransfer performance of a zigzag-serpentine microchannel heat sink

Yi Peng et al.

Summary: The paper presents a zigzag-serpentine microchannel heat sink (ZSMHS) designed to study heat transfer and hydraulic performance through experiments. Different angles of the zigzag microchannel were investigated, with 30 degrees providing the lowest pressure drop, friction coefficient, and thermal resistance. The serpentine microchannel improved the hydraulic performance of the ZSMHS.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Thermodynamics

A study on thermal characteristics of double-layered microchannel heat sink: Effects of bifurcation and flow configuration

Pankaj Srivastava et al.

Summary: A comparative study was conducted on the flow and thermal characteristics in a double-layered microchannel with bifurcation, showing that the bifurcation plates reduce the overall thermal resistance but increase pressure drop and pumping power. Nusselt number is higher in parallel-flow than counter-flow, but the difference is greater at low Re values and diminishes with increasing flow rate. Counter-flow offers a more uniform temperature distribution essential for thermal system reliability.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Engineering, Chemical

Hydrodynamic analysis of the nanofluids flow in a microchannel with hydrophobic and superhydrophobic surfaces

Ali Heidarian et al.

Summary: This study investigated the hydrodynamic features of nanofluids flowing in straight microchannels with walls of varying hydrophobicities using the finite volume method. The results indicated that nanofluids increase pumping power, with superhydrophobic walls and nanofluids significantly reducing pressure drop.

JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS (2021)

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Article Thermodynamics

Numerical investigation of flow boiling characteristics in cobweb-shaped microchannel heat sink

Juncheng Qiu et al.

Summary: Researchers introduced biomimetic microchannels inspired by cobweb structures for enhancing flow boiling heat transfer performance. The cobweb-shaped microchannels demonstrated improved heat transfer coefficient and lower wall temperature due to flow disturbance and increased heat transfer area. Among them, the cobweb-shaped microchannels with horizontal inlet and outlet showed the best heat transfer performance and most stable flow boiling behavior particularly at high heat flux.

CASE STUDIES IN THERMAL ENGINEERING (2021)

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Article Thermodynamics

A holistic approach to thermal-hydraulic design of 3D manifold microchannel heat sinks for energy-efficient cooling

Daeyoung Kong et al.

Summary: The study conducted a full 3D conjugated simulation to analyze the thermal and hydraulic performance of manifold microchannel heat sinks (MMCHSs), and designed twelve manifold geometries with different outlet directions and widths. The findings are important for enhancing the design performance of MMCHS.

CASE STUDIES IN THERMAL ENGINEERING (2021)

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Article Thermodynamics

Computational study of rib shape and configuration for heat transfer and fluid flow characteristics of microchannel heat sinks with fan-shaped cavities

Qifeng Zhu et al.

Summary: The combination of cavities and ribs significantly affects the performance and efficiency of microchannel heat sink systems. Optimizing the shape and position of ribs is crucial for minimizing pressure drop and maximizing heat removal efficiency. Different shapes and dimensions of ribs have a noticeable impact on the overall system performance.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

A silicon-diamond microchannel heat sink for die-level hotspot thermal management

Danish Ansari et al.

Summary: The study introduced a novel microchannel heat sink design based on the different thermal conductivities of materials, using silicon for low-heat-flux zones and diamond for high-heat-flux zones. The composite design showed significant performance enhancement in thermal management without increasing pressure drop or pumping power. Numerical analysis demonstrated the effectiveness of the composite heat sink in mitigating die-level hotspots in electronic cooling applications.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

The microchannel combined hydrophobic nanostructure for enhancing boiling heat transfer

Linsong Gao et al.

Summary: The study demonstrated that the use of nanostructures can increase bubble nucleation sites and reduce energy barriers, particularly effective at low heat flux. Meanwhile, microchannels can reduce bubble growth time and delay bubble coalescence, showing significant effects at high heat flux. The combination of micro-nano structures achieved better heat transfer performance by capitalizing on both effects.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Improving performance of single and double-layered microchannel heat sinks by cylindrical ribs: A numerical investigation of geometric parameters

K. Derakhshanpour et al.

Summary: The study conducted 3-Dimensional numerical simulations to analyze laminar fluid flow and forced convection heat transfer through novel designs of microchannel heat sinks with cylindrical ribs. Incorporation of cylindrical ribs significantly enhanced heat transfer coefficient and reducing rib pitch had a greater effect on improving hydrothermal performance. Additionally, double-layered microchannels showed higher convection heat transfer coefficient and double-layered-design 1 microchannels performed the best with increased mass flow rate.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Effects of surfactant and nanofluid on the performance and optimization of a microchannel heat sink

Hielfarith Suffri Shamsuddin et al.

Summary: This study investigates the influence of surfactant Triton X-100 on boron nitride nanotubes nanofluid in microchannel heat sink, showing that the surfactant can improve thermal performance at 30 degrees Celsius and reduce pressure drop at 50 degrees Celsius. Optimized MCHS dimensions given by MOPSO technique result in improved overall performance for MCHS systems.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

The effect of surface wettability on flow boiling characteristics within microchannels

Konstantinos Vontas et al.

Summary: This paper conducts an advanced numerical investigation on the effect of surface wettability characteristics on bubble growth within microchannels. The results demonstrate a significant impact of surface wettability on heat transfer coefficients, with hydrophilic and hydrophobic surfaces outperforming single-phase reference simulations by approximately 43.9% and 17.8% respectively.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Single-phase and Two-phase Flow and Heat Transfer in Microchannel Heat Sink with Various Manifold Arrangements

Yuhao Lin et al.

Summary: Research has shown that the arrangement of multiple channels in MMC heat sinks has a significant impact on overall heat transfer performance and pumping power requirements. In single-phase heat transfer applications, the HU-type and ZU-type MMC heat sinks perform the best; in two-phase cases, using the HU-type MMC heat sink can achieve a relatively uniform bottom wall temperature distribution.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Experimental and numerical study on the temperature uniformity of a variable density alternating obliquely truncated microchannel

Xin Lan et al.

Summary: A novel microchannel design combining alternating obliquely truncated microchannel and oblique fin enhancement is proposed in this research to improve temperature uniformity. Experimental and numerical analysis shows significant advantages of the design.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Review Thermodynamics

A review on flow boiling enhancement and fabrication of enhanced microchannels of microchannel heat sinks

Daxiang Deng et al.

Summary: This paper comprehensively reviews recent advancements in flow boiling enhancement and fabrication of enhanced microchannels. It emphasizes the flow boiling enhancement performance of these enhanced microchannels in microchannel heat sinks, while also discussing their advantages and disadvantages after summarizing the classification and manufacturing methods of enhanced microchannels.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Heat transfer, pressure drop and flow patterns of flow boiling on heterogeneous wetting surface in a vertical narrow microchannel

Yuhao Lin et al.

Summary: Micro-structured surfaces have a significant impact on flow patterns and heat transfer mechanisms during flow boiling, with a trade-off between hydrophobic and hydrophilic surfaces. Experimental investigation of flow boiling with heterogeneous wetting surfaces showed an enhanced heat transfer coefficient on hydrophobic patterns perpendicular to the flow direction, while gradually lower heat transfer coefficient on hydrophobic patterns parallel to the flow direction.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2021)

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Article Engineering, Mechanical

Thermal and flow performance in microchannel heat sink with open-ring fins

Long Zeng et al.

Summary: A unique microchannel heat sink design with inline and staggered open-ring pin fins was developed for high heat flux devices. The open-ring pin fins induced flow separations and convergences, leading to enhanced heat transfer performance. The staggered configuration showed slightly better heat transfer performance than the inline configuration, making it more favorable for heat dissipation in high heat flux devices.

INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES (2021)

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Article Thermodynamics

A microchannel flow with presence of micro -post arrays on channel top wall

Abdullah Al-Sharafi et al.

Summary: This study investigates the influence of micro-post arrays and trapped air on velocity and temperature increase of the working fluid in microchannel flow. Experimental results show that micro-post arrays affect the flow field near the channel top wall, while air trapped between the arrays influences heat transfer rates. Additionally, increasing the pitch size of the arrays decreases the Nusselt number, increasing the microchannel height lowers the Nusselt number, and the pressure drop is significantly influenced by the arrays.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Thermodynamics

Effects of geometric parameters of circular pin-fins on fluid flow and heat transfer in an interrupted microchannel heat sink

Zhenfei Feng et al.

Summary: The study found that using double circular pin-fins in each microchamber in an interrupted microchannel is an effective method to enhance heat transfer performance, achieving a 42% enhancement after optimizing geometric parameters.

INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2021)

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Article Chemistry, Physical

Molecular dynamics simulation of water-based Ferro-nanofluid flow in the microchannel and nanochannel: Effects of number of layers and material of walls

Xiao-Yong Shen et al.

Summary: This paper investigates the effect of Fe3O4 nanoparticles on the behavior of water-based fluid by using molecular dynamics simulation, and explores the influence of channel wall material and number of layers on fluid flow. Increasing the number of wall layers can enhance interactions between fluid particles and walls, leading to an accumulation of fluid particles near channel walls and an increase in density.

JOURNAL OF MOLECULAR LIQUIDS (2021)

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Article Thermodynamics

Flow Boiling of Ammonia in a Diamond-Made Microchannel Heat Sink for High Heat Flux Hotspots

Qi Yang et al.

JOURNAL OF THERMAL SCIENCE (2020)

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Article Energy & Fuels

Numerical investigation of the fluid flow and heat transfer characteristics of tree-shaped microchannel heat sink with variable cross-section

Pingnan Huang et al.

CHEMICAL ENGINEERING AND PROCESSING-PROCESS INTENSIFICATION (2020)

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Article Materials Science, Ceramics

Aluminum nitride as an alternative ceramic for fabrication of microchannel heat exchangers: A numerical study

Mehdi Fattahi et al.

CERAMICS INTERNATIONAL (2020)

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Article Thermodynamics

Flow boiling instability characteristics in microchannels with porous-wall

L. X. Zong et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

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Review Thermodynamics

Review of channel flow boiling enhancement by surface modification, and instability suppression schemes

Gangtao Liang et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

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Article Thermodynamics

Effects of surface roughness in microchannel with passive heat transfer enhancement structures

Hui Lu et al.

INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2020)

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Article Thermodynamics

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Experimental Characterization of a Nickel Alloy-Based Manifold-Microgroove Evaporator

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An experimental investigation on flow boiling heat transfer enhancement using spray pyrolysed alumina porous coatings

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2014)

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2014)

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NUCLEAR ENGINEERING AND DESIGN (2014)

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Investigation on Flow Maldistribution in Parallel Microchannel Systems for Integrated Microelectronic Device Cooling

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IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY (2014)

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APPLIED PHYSICS LETTERS (2013)

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An experimental study on flow boiling heat transfer of R134a in a microchannel-based heat sink

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Two-Phase Heat Sinks with Microporous Coating

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A 3D numerical study of heat transfer in a single-phase micro-channel heat sink using graphene, aluminum and silicon as substrates

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2013)

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Prediction of micro surface cooler performance for different rectangular type microchannels dimensions

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Effects of surface roughness on flow boiling in silicon microgap heat sinks

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2013)

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Heat transfer mechanism, pressure drop and flow patterns during FC-72 flow boiling in horizontal and vertical minichannels with enhanced walls

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2013)

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Boiling heat transfer enhancement in mini/microtubes via polyhydroxyethylmethacrylate (pHEMA) coatings on inner microtube walls at high mass fluxes

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JOURNAL OF MICROMECHANICS AND MICROENGINEERING (2013)

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Proceedings Paper Nanoscience & Nanotechnology

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Optimal design of geometric parameters of double-layered microchannel heat sinks

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An Experimental Investigation of Structured Roughness Effect on Heat Transfer During Single-Phase Liquid Flow at Microscale

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JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME (2012)

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FLOWER-LIKE CuO NANOSTRUCTURES FOR ENHANCED BOILING

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NANOSCALE AND MICROSCALE THERMOPHYSICAL ENGINEERING (2012)

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EXPERIMENTAL INVESTIGATION OF THE EFFECT OF FLOW ARRANGEMENTS ON THE PERFORMANCE OF A MICRO-CHANNEL HEAT SINK

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Flow boiling enhancement of FC-72 from microporous surfaces in minichannels

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EXPERIMENTAL THERMAL AND FLUID SCIENCE (2011)

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Numerical simulation of heat transfer enhancement in wavy microchannel heat sink

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2011)

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Influence of channel shape on the thermal and hydraulic performance of microchannel heat sink

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2011)

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Influence of various base nanofluids and substrate materials on heat transfer in trapezoidal microchannel heat sinks

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2011)

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Critical heat flux on flow boiling of methanol-water mixtures in a diverging microchannel with artificial cavities

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2011)

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Bubble nucleation in microchannel flow boiling using single artificial cavity

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2011)

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Development of Single Phase Liquid Cooling Solution for 3-D Silicon Modules

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IEEE TRANSACTIONS ON COMPONENTS PACKAGING AND MANUFACTURING TECHNOLOGY (2011)

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Fluid flow and heat transfer in wavy microchannels

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2010)

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Single-phase heat transfer in microchannels: The importance of scaling effects

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APPLIED THERMAL ENGINEERING (2009)

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Numerical study of the inlet/outlet arrangement effect on microchannel heat sink performance

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INTERNATIONAL JOURNAL OF THERMAL SCIENCES (2009)

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Heat Transfer and Pressure Drop Characteristics in Dielectric Flow in Surface-Augmented Microchannels

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JOURNAL OF ENHANCED HEAT TRANSFER (2009)

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A highly stable microchannel heat sink for convective boiling

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Optimum thermal performance of microchannel heat sink by adjusting channel width and height

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INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2008)

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Numerical analysis of heat transfer in a manifold microchannel heat sink with high efficient copper heat spreader

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MICROSYSTEM TECHNOLOGIES-MICRO-AND NANOSYSTEMS-INFORMATION STORAGE AND PROCESSING SYSTEMS (2008)

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IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES (2007)

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Experimental investigation of microchannel coolers for the high heat flux thermal management of GaN-on-SiC semiconductor devices

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INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER (2007)

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Review Multidisciplinary Sciences

Control and detection of chemical reactions in microfluidic systems

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NATURE (2006)

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Stabilization of flow boiling in microchannels using pressure drop elements and fabricated nucleation sites

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JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME (2006)

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Effect of the inlet location on the performance of parallel-channel cold-plate

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IEEE TRANSACTIONS ON COMPONENTS AND PACKAGING TECHNOLOGIES (2006)

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Evolution of microchannel flow passages - Thermohydraulic performance and fabrication technology

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HEAT TRANSFER ENGINEERING (2003)

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MEMS-enabled thermal management of high-heat-flux devices EDIFICE: embedded droplet impingement for integrated cooling of electronics

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EXPERIMENTAL THERMAL AND FLUID SCIENCE (2001)

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