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Article
Thermodynamics
Ahmed Elkholy et al.
Summary: The boiling performance of hooks-shaped metal fins manufactured from copper by a skiving process was compared to that of a bare copper surface. The results showed that the hooked surface had a lower wall superheat and a higher heat transfer coefficient. The hooked surface also achieved a significantly enhanced critical heat flux. These findings suggest that the use of hooked surfaces can improve immersion cooling spreaders in power electronics applications.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Reda A. Khalaf-Allah et al.
Summary: This paper presents the experimental findings of heat transmission during pool boiling on micro-structured copper heating surfaces modified in different ways. The micro-structured surfaces were created using a wire-cutting machine, laser processing, and sandpaper. Using pure water as the liquid, the heat transfer coefficients of the micro-structured surfaces were estimated through experiments. The results showed that the composite surface modification technology of forming a microscopic structure on the heat source surface achieved a maximum improvement of 51-92%.
APPLIED THERMAL ENGINEERING
(2023)
Article
Chemistry, Multidisciplinary
Jiaqi Li et al.
Summary: This study investigates the degeneration of wicking capability on structured surfaces and emphasizes the importance of environmental volatile organic compound adsorption. The authors design a hierarchical structure with superior wicking capability and anti-degeneration performance, demonstrating a 4100% increase in durability compared to single-tier structures. The research also reveals the coexistence of dry areas underneath individual bubbles during boiling on highly wicking surfaces, leading to significant augmentation of the three-phase contact line length.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Review
Thermodynamics
Munonyedi Egbo
Summary: Vapor chambers are an important type of two-phase cooling system, with their thermal performance mainly dependent on the heat transfer and capillary characteristics of the wicking structure. This study classifies and compares vapor chambers based on different types of evaporation wicks, highlighting their respective pros and cons. Future research directions include manufacturing and characterizing vapor chambers for concentrated heat flux dissipation applications.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Satish G. Kandlikar
Summary: Boiling is a highly efficient heat transfer phenomenon, but further improvements are needed in many applications. Microscale enhancement techniques on small heaters have achieved success in improving heat transfer efficiency, and these techniques may be applied in large-scale boiling equipment.
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2022)
Article
Chemistry, Physical
Runkeng Liu et al.
Summary: This study elucidated the characteristics of ultra-thin water film evaporation through simulation, revealing the phenomenon of self-pumping water transport through nanopores induced by the driving force of the evaporation meniscus. Additionally, it was demonstrated that coating the nanopores with hydrophobic carbon nanotubes (CNT) is a feasible strategy to reduce water loss through evaporation and increase evaporation flux.
Article
Thermodynamics
Hongwei Li et al.
Summary: This paper presents a new flat heat pipe design with bionic grading microchannels (BGFHP) based on special high-low structured surface. Experimental studies and comparative analysis reveal the advantages of BGFHP in terms of heat transfer performance, visible internal flow characteristics, and thermal management effects.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Guanghan Huang et al.
Summary: This study investigated the enhanced pooling boiling of a nanoporous copper surface under low pressure conditions. The experimental results showed that the nanoporous surface significantly improved the pool boiling heat transfer and mitigated the negative influence of sub-atmospheric conditions. The study also found that the nanoporous surface led to higher heat transfer coefficient enhancement at a lower pressure.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Review
Green & Sustainable Science & Technology
Xiao Yuan et al.
Summary: The study discusses the use of hybrid or hierarchical structures with smart materials to enhance the heat transfer coefficient (HTC) and critical heat flux (CHF) in boiling. Surface modifications to improve pool boiling heat transfer are reviewed, including micro/nano structures, coatings and porous surfaces. Smart surfaces that can actively change their wettability characteristics during boiling process are then introduced. The potential of combining micro-nano structures, wettability hybrid structures and smart materials for enhanced heat transfer is discussed, along with the challenges associated with smart surfaces. The review also provides solutions in terms of structure machining, materials selections and fabrication methods. The importance of smart surfaces in various energy and environment applications is emphasized.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2022)
Article
Chemistry, Multidisciplinary
Youngsup Song et al.
Summary: In this work, a three-tier hierarchical structure is designed to overcome the trade-off between HTC and CHF. By defining nucleation sites with microcavities and incorporating nanostructures, the bubble coalescence is minimized and evaporation is promoted, leading to significant enhancement in both HTC and CHF compared to a smooth surface.
ADVANCED MATERIALS
(2022)
Article
Thermodynamics
Bin Liu et al.
Summary: The distribution of nanostructures on micro-nano composited surfaces significantly affects the pool boiling heat transfer performance. Surfaces with nanostructures covering the top and bottom sides have the lowest wall superheat, while surfaces with nanostructures etched at the top corners or edges have higher heat transfer coefficients. Bubbles are mainly generated on the tops of micro-pin-fins, alleviating the blockage of capillary wicking channels in high heat flux regions. Moreover, the condensation effect of subcooled liquid on the bubbles generated at the tops of micro-pin-fins is stronger.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Lin Lin et al.
Summary: The preparation of micro-nano hybrid structured copper surfaces through sandblasting and ultrasonic wet etching techniques has been investigated for its impact on nucleate pool boiling. The study found that the hybrid structure exhibits improved critical heat flux and heat transfer coefficient compared to smooth and individual micro or nano structured surfaces. The enhancement mechanisms are attributed to the combined effects of roughness, surface area ratio, and wettability.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
A. N. Pavlenko et al.
Summary: This article provides a brief review of studies on heat-transfer enhancement and increasing critical heat fluxes during boiling and evaporation in thin horizontal liquid layers. The effect of liquid layer height on heat-transfer efficiency at different heat fluxes is analyzed. The article also discusses the formation of structures in thin liquid layers and their impact on heat-transfer enhancement. Experimental evidence has shown that heat-transfer enhancement occurs during evaporation of a liquid layer at reduced pressures. The research also found that increasing the layer thickness leads to an increase in the critical heat flux.
THERMAL ENGINEERING
(2022)
Review
Thermodynamics
Li Ling et al.
Summary: Data centers have been increasing in number and size due to the rapid development in demand for data storage, networking, and computation. A heat pipe system is considered a promising solution to reduce the energy consumption of cooling systems, with high thermal efficiency, reliability, and cost effectiveness. This study provides a systematic review of existing heat pipe systems applied in data centers, focusing on types, thermal characteristics analysis, and energy efficiency comparison.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Shangzhen Xie et al.
Summary: This study decouples the contributions of surface wettability and hierarchical structure on boiling enhancement, revealing that surface orientation influences boiling performance and proposing new correlations for downward-facing critical heat flux prediction, which could be useful for future multi-oriented surface designs.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Energy & Fuels
Robert Kaniowski et al.
Summary: The experimental results presented in this paper show that using copper microchannel surfaces can achieve a five-fold increase in heat transfer coefficient and a two-fold increase in critical heat flux compared to a smooth flat surface when conducting pool boiling heat transfer of dielectric liquid FC-72 at atmospheric pressure. The article also analyzes the influence of the width and height of the microchannel on the heat transfer process.
Review
Chemistry, Physical
Wei Yu et al.
Summary: This article discusses the potential of carbon nanotubes (CNTs) in thermal management for electronics, highlighting their high thermal conductivity and other desirable properties. It also covers the progress on thermal conductivity of CNT-reinforced composites, aligned CNT materials, and the use of CNTs in passive heat dissipation methods. The challenges and prospects for future studies on utilizing CNTs in thermal management are also discussed.
Article
Thermodynamics
Risako Kibushi et al.
Summary: This study experimentally verified saturated pool boiling in water and FC-72, showing that there is an optimal groove size to enhance critical heat flux, and the heat transfer performance and boiling heat transfer of the two-phase immersion cooling system were improved.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Prasanna Jayaramu et al.
Summary: This study focuses on the influence of ageing on thermal and hydraulic performance through repeated experimental runs of flow boiling of water in a 1 mm hydraulic diameter end-milled copper channel. Aging and surface characterization study on dummy copper samples are used to infer the effects of ageing on mini/microchannel surface characteristics and boiling performance.
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2021)
Article
Energy & Fuels
Robert Kaniowski et al.
Summary: This study investigates pool boiling on enhanced surfaces with microchannels, showing an increase in heat flux and heat transfer coefficient on surfaces with microchannels. The results demonstrate improved heat transfer efficiency with microchannel structures.
Article
Thermodynamics
Maharshi Y. Shukla et al.
Summary: The study investigates the impact of different liquid heights on pool boiling performance, finding that the ratio of liquid height to departing bubble diameter is a key parameter affecting performance. The findings can be used in the design of pool boiling equipment, especially in applications such as electronics cooling.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Multidisciplinary Sciences
Jiaqi Li et al.
Summary: This study used high-magnification in-liquid endoscopy to investigate bubble behavior during boiling on structured surfaces, revealing the previously unknown coexistence of two distinct three-phase contact lines, resulting in the retention of a thin liquid film between the two contact lines. This finding sheds light on a previously unidentified mechanism governing bubble evolution on structured surfaces and has significant implications for various real systems utilizing bubble formation.
Article
Chemistry, Multidisciplinary
Jiaqi Li et al.
Summary: This study develops a technique for fabricating ultra-small microchannels on arbitrary metallic materials, and investigates the pool boiling heat transfer performance of copper microchannels, with a focus on three-phase contact line dynamics. The results demonstrate that the scalable microchannel surfaces exhibit superior heat transfer performance, with a maximum heat transfer coefficient enhancement of 930% and ultra-low wall superheat of 5 degrees C.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Jiang Chun et al.
Summary: Efficient cooling approach for high heat flux removal can be achieved through evaporation and boiling heat transfer on micro/nanostructured surfaces with superior wicking capability. This study reports a rapid capillary wicking capability on hierarchical nanowired surfaces with interconnected V-grooves, reaching a wicking coefficient of 6.54 mm/s(0.5). Experimental results show that larger fractions and depths of V-grooves, as well as higher surface tension to viscosity ratios of the liquid, lead to higher wicking coefficients.
ACS APPLIED NANO MATERIALS
(2021)
Article
Thermodynamics
Guang Pi et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Multidisciplinary Sciences
Remco van Erp et al.
Article
Thermodynamics
V. Zhukov et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Review
Thermodynamics
Murat Bulut et al.
HEAT TRANSFER ENGINEERING
(2019)
Article
Chemistry, Multidisciplinary
Jiaqi Li et al.
Article
Thermodynamics
Prasanna Jayaramu et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2019)
Article
Thermodynamics
Avdhoot Walunj et al.
APPLIED THERMAL ENGINEERING
(2018)
Article
Computer Science, Interdisciplinary Applications
Kong Ling et al.
COMPUTERS & FLUIDS
(2018)
Article
Thermodynamics
V. I. Zhukov et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Article
Thermodynamics
Rinku Kumar Gouda et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2018)
Review
Green & Sustainable Science & Technology
Nor Haziq Naqiuddin et al.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2018)
Review
Chemistry, Physical
Rongfu Wen et al.
Article
Thermodynamics
Satish G. Kandlikar
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2017)
Review
Green & Sustainable Science & Technology
Rajiva Lochan Mohanty et al.
RENEWABLE & SUSTAINABLE ENERGY REVIEWS
(2017)
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Rongfu Wen et al.
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Thermodynamics
Amir Mirza Gheitaghy et al.
APPLIED THERMAL ENGINEERING
(2017)
Article
Physics, Applied
P. A. Raghupathi et al.
APPLIED PHYSICS LETTERS
(2017)
Article
Thermodynamics
Arvind Jaikumar et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2016)
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Thermodynamics
Arvind Jaikumar et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2015)
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Chinmay M. Patil et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2014)
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Thermodynamics
Dwight Cooke et al.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2012)
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Thermodynamics
Dwight Cooke et al.
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2011)
Article
Thermodynamics
SG Kandlikar
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2001)