Article
Chemistry, Multidisciplinary
Luca Stendardo, Athanasios Milionis, George Kokkoris, Christos Stamatopoulos, Chander Shekhar Sharma, Raushan Kumar, Matteo Donati, Dimos Poulikakos
Summary: A new surface texture design strategy has been discovered through three-dimensional multiphase computational approach, which can achieve efficient droplet departure and enhance condensation heat-transfer efficiency and water harvesting capabilities.
Article
Thermodynamics
Hai Wang, Xin Zhao, Junfeng Wang, Zhentao Wang, Dongbao Wang, Jiameng Tian
Summary: The study developed superhydrophilic and superhydrophobic hybrid surfaces for enhancing condensation heat transfer on copper substrates. The synergistic combination of superhydrophobic and superhydrophilic surfaces was effective in improving droplet nucleation rate, coalescence control, and condensate removal efficiency. Experimental results showed that the SSH-2 surface outperformed the SSH-3 and SSH-1 surfaces in heat transfer performance, with a heat transfer coefficient 1.1 and 1.3 times higher at a surface subcooling of 7.1 K, respectively.
CASE STUDIES IN THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Taeyang Han, Younghyun Choi, Kyung Mi Na, Moo Hwan Kim, HangJin Jo
Summary: The study demonstrates the crystal self-arrangement using capillary flow to enhance condensation efficiency by combining hierarchical structures and biphilic wettability. This results in increased jumping frequency and heat transfer coefficient on the developed surface, paving the way for enhanced efficiency in diverse applications.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Xin Wang, Bo Xu, Zhenqian Chen, Yang Yang, Qian Cao
Summary: The study simulates dropwise condensation heat transfer on different microstructured surfaces using 2D hybrid thermal lattice Boltzmann method, investigating the dynamic behaviors of condensate droplets and analyzing the influence of surface wettability, surface microstructure, and subcooling degree on condensate dynamics and heat transfer performance. The results show that condensate microdroplets preferentially form at the valley or side of micropillar arrays, with superhydrophobic surfaces eventually surpassing hydrophilic and hydrophobic surfaces in condensate mass and rate. The study provides insight into the microscopic mechanism of dropwise condensation heat transfer.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2021)
Article
Nanoscience & Nanotechnology
Soumei Baba, Kenichiro Sawada, Kohsuke Tanaka, Atsushi Okamoto
Summary: This study focused on the hierarchical nano/microstructure of Euphorbia myrsinites leaves and successfully mimicked the structure artificially to provide important insights for the development of new engineering materials.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Xifan Fu, Qinpeng Zhu, Denghui Liu, Binghan Liu, Lintao Kuang, Yanhui Feng, Fuqiang Chu, Zhi Huang
Summary: A study on moisture condensation on hybrid superhydrophobic-hydrophilic surfaces revealed the significant impact of wettability difference and microstructure size on condensation efficiency, leading to a 90% enhancement in condensation rate. Detailed analysis of the condensation process provided insights into the enhanced condensation mechanism, proposing effective methods for controlling and optimizing moisture condensation.
Article
Chemistry, Multidisciplinary
Muhammad Jahidul Hoque, Shreyas Chavan, Ross Lundy, Longnan Li, Jingcheng Ma, Xiao Yan, Shenghui Lei, Nenad Miljkovic, Ryan Enright
Summary: The combination of smooth, low-surface-energy spots with rough superhydrophobic backgrounds can achieve higher jumping-droplet condensation heat-transfer coefficients. Design guidelines for biphilic surfaces to maximize condensation heat transfer are proposed based on simulation and experimental validation.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Thermodynamics
Marco Tancon, Riccardo Parin, Stefano Bortolin, Alessandro Martucci, Davide Del Col
Summary: Dropwise condensation is a complex phenomenon involving droplet nucleation, coalescence and motion. Limited studies have investigated the effect of vapor velocity on heat transfer coefficient and droplet departing radius during DWC.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Chemistry, Multidisciplinary
Yihao Zhu, Tsz Chung Ho, Hau Him Lee, Michael Kwok Hi Leung, Chi Yan Tso
Summary: By optimizing the structure of a biphilic surface, the condensation performance can be improved. A experimentally verified theory of droplet jumping is reported, which can maximize the jumping height of droplets on the biphilic surface. The improved biphilic surface shows significantly enhanced heat flux and water collection efficiency.
CELL REPORTS PHYSICAL SCIENCE
(2022)
Article
Green & Sustainable Science & Technology
Shoaib Khanmohammadi, Sajjad Khanjani
Summary: The study investigated the effect of cold plasma coating on the performance of solar still desalination systems, showing that the coating can increase surface hydrophobicity and freshwater production. The quality of desalinated water with the coating also meets the World Health Organization guidelines for drinking water quality.
SUSTAINABLE ENERGY TECHNOLOGIES AND ASSESSMENTS
(2021)
Article
Chemistry, Multidisciplinary
Edward Hingha Foday, Bo Bai
Summary: Mangifera indica leaves have been used to collect atmospheric water for the first time, providing a solution to the water crisis in tropical countries and turning waste into a valuable resource.
Article
Chemistry, Physical
Je-Un Jeong, Dae-Yun Ji, Kwon-Yeong Lee, Woonbong Hwang, Chang-Hun Lee, Sung-Jae Kim, Jeong-Won Lee
Summary: The study highlights the importance of superhydrophobic surfaces being able to resist attached condensation in supersaturated conditions to improve heat transfer efficiency, which can be achieved by controlling the gap size and complexity of micro/nanoscale surface structures to maintain water repellency.
Article
Thermodynamics
Fengyong Lv, Sifan Lin, Hanlu Nie, Zhenbiao Dong, Fang Zhao, Daolai Cheng, Zhiguang Dong, Raza Gulfam
Summary: This study investigates the droplet dynamics and heat transfer performance of a helically-finned hydrophobic tube fabricated using a simple annealing method. The findings show that the heat transfer coefficient of the helically-finned hydrophobic tube can increase by up to 327% compared to a smooth hydrophilic tube at a specific heat flux. Furthermore, the heat transfer coefficient decreases as the subcooling temperature increases, primarily due to slower droplet growth and dripping frequency. The grooves on the helically-finned hydrophobic tube enhance droplet coalescence and sweeping, resulting in improved heat transfer performance. This study provides technological insights to enhance heat transfer performance in industrial condensers.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Review
Chemistry, Physical
Xin Wang, Bo Xu, Zhenqian Chen, Davide Del Col, Dong Li, Leigang Zhang, Xinzhu Mou, Qiusheng Liu, Yang Yang, Qian Cao
Summary: This paper presents a detailed review of scientific issues related to droplet dynamics and dropwise condensation heat transfer. It covers topics such as wetting theory, solid-liquid interfacial interaction, theoretical and numerical models for dropwise condensation, and fabricating techniques for enhancing heat transfer. The future directions of research in this field are also discussed.
ADVANCES IN COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Wei Chang, Benli Peng, Ahmed S. Khan, Mohammad Alwazzan, Yunya Zhang, Xiaodong Li, Yan Tong, Chen Li
Summary: The study reveals the significant impact of graphene grain size on the wettability of polycrystalline graphene, showing that the static contact angle and hysteresis on graphene surfaces change with the average graphene grain areas. Furthermore, experiments on water vapor condensation indicate that a larger graphene grain size leads to enhanced dropwise condensation heat transfer rates.
Article
Chemistry, Multidisciplinary
Xin Yan, Jinliang Xu, Zhijun Meng, Jian Xie, Guohua Liu
Article
Energy & Fuels
Jinliang Xu, Haisong Zhang, Bingguo Zhu, Jian Xie
Article
Thermodynamics
Jia-Qi Guo, Ming-Jia Li, Jin-Liang Xu, Jun-Jie Yan, Teng Ma
ENERGY CONVERSION AND MANAGEMENT
(2020)
Article
Thermodynamics
Jian Xie, Qingting She, Jinliang Xu, Cong Liang, Wenxiao Li
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Mingjia Li, Ge Wang, Jinliang Xu, Jingwei Ni, Enhui Sun
Summary: The benefits of large-scale supercritical CO2 coal-fired power plants are analyzed and compared with ultra-supercritical water-steam Rankine cycle coal-fired power plants in terms of energy environment and economy. The results show that the S-CO2 coal-fired power generation system outperforms the USC coal-fired power generation system in terms of energy consumption, resource depletion, environmental impact, and investment cost.
JOURNAL OF THERMAL SCIENCE
(2022)
Article
Thermodynamics
Haisong Zhang, Jinliang Xu, Xinjie Zhu, Jian Xie, Mingjia Li, Bingguo Zhu
Summary: This paper investigates the relationship between pressure drop and heat transfer in supercritical carbon dioxide (sCO(2)), introducing the concept of pseudo-boiling to characterize the flow and heat transfer in the supercritical domain. Different regimes of heat transfer behavior and pressure drops are identified, with a new correlation for friction factors developed to better predict the results in sCO(2) systems.
APPLIED THERMAL ENGINEERING
(2021)
Article
Physics, Multidisciplinary
Guanglin Liu, Qingyang Wang, Jinliang Xu, Zheng Miao
Summary: The study focuses on the subcritical saturated organic Rankine cycle system with four different organic working fluids at various heat source temperatures. It concludes that the efficiency of the two-stage system is affected by the choice of organic working fluids and is higher than that of a single-stage system.
Article
Thermodynamics
Xiongjiang Yu, Jinliang Xu, Guohua Liu, Xianbing Ji
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)
Article
Thermodynamics
Chunlei Cao, Xiaojing Ma, Xiaotian He, Jinliang Xu, Jian Xie, Guohua Liu
Summary: The study demonstrates that using a soft surface can significantly enhance boiling heat transfer efficiency, especially under saturated boiling conditions. The soft surface can reduce bubble departure size and increase departure frequency, thereby lowering the wall superheating temperature. The formation of elastocapillary waves and dynamic wrinkles can improve heat transfer effect by disturbing the near-wall boundary layer.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Enhui Sun, Jinliang Xu, Mingjia Li, Hangning Li, Chao Liu, Jian Xie
ENERGY CONVERSION AND MANAGEMENT-X
(2020)
Article
Chemistry, Multidisciplinary
Guihua Tang, Dong Niu, Lin Guo, Jinliang Xu
Article
Thermodynamics
Bingguo Zhu, Jinliang Xu, Haisong Zhang, Jian Xie, Mingjia Li
APPLIED THERMAL ENGINEERING
(2020)
Review
Thermodynamics
Hao Guo, Xianbing Ji, Jinliang Xu
FRONTIERS IN HEAT AND MASS TRANSFER
(2020)
Article
Thermodynamics
Longyan Zhang, Jinliang Xu, Guangling Liu, Junpeng Lei
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2020)
Article
Thermodynamics
Mahsa Taghavi, Swapnil Sharma, Vemuri Balakotaiah
Summary: This study investigates the natural convection effects in the insulation layers of spherical storage tanks and their impact on the tanks' performance. The permeability and Rayleigh number of the insulation material are considered as key factors. The results show that as the Rayleigh number increases, new convective cells emerge and cause the cold boundary to approach the external hot boundary. In the case of large temperature differences, multiple solutions may coexist.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyang Xu, Fangjun Hong, Chaoyang Zhang
Summary: This study introduces a self-induced jet impingement device for enhancing pool boiling performance in high power electronic cooling. Through visualization and parametric investigations, the effects of this device on pool boiling performance are studied, revealing the promotion of additional liquid supply and vapor exhausting. The flow rate of the liquid jet is found to positively impact boiling performance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Wenchao Ke, Yuan Liu, Fissha Biruke Teshome, Zhi Zeng
Summary: Underwater wet laser welding (UWLW) is a promising and labor-saving repair technique. A thermal multi-phase flow model was developed to study the heat transfer, fluid dynamics, and phase transitions during UWLW. The results show that UWLW creates a water keyhole, making the welding environment similar to in air laser welding.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Xingrong Lian, Lin Tian, Zengyao Li, Xinpeng Zhao
Summary: This study investigates the heat transfer mechanisms in natural fiber-derived porous structures and finds that thermal radiation has a significant impact on the thermal conductivity in low-density regions, while natural convection rarely occurs. Insulation materials derived from micron-sized natural fibers can achieve minimum thermal conductivity at specific densities. Strategies to lower the thermal conductivity include increasing porosity and incorporating nanoscale pores using nanosize fibers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Yasir A. Malik, Kilian Koebschall, Stephan Bansmer, Cameron Tropea, Jeanette Hussong, Philippe Villedieu
Summary: Ice crystal icing is a significant hazard in aviation, and accurate modeling of sticking efficiency is essential. In this study, icing wind tunnel experiments were conducted to quantify the volumetric liquid water fraction, sticking efficiency, and maximum thickness of ice layers. Two measurement techniques, calorimetry and capacitive measurements, were used to measure the liquid water content and distribution in the ice layers. The experiments showed that increasing wet bulb temperatures and substrate heat flux significantly increased sticking efficiency and maximum ice layer thickness.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinqi Hu, Tongtong Geng, Kun Wang, Yuanhong Fan, Chunhua Min, Hsien Chin Su
Summary: This study experimentally examined the heat dissipation of vibrating fans and demonstrated its inherent mechanism through numerical simulation. The results showed that the flow fields induced by the vibrating blades exhibited pulsating features and formed large-scale and small-scale vortical structures, significantly improving heat dissipation. The study also identified the impacts of different blade structures and developed a trapezoidal-folding blade, which effectively reduced the maximum temperature of the heat source and alleviated high-temperature failure crisis.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Dan-Dan Su, Xiao-Bin Li, Hong-Na Zhang, Feng-Chen Li
Summary: The boiling heat transfer of low-boiling-point working fluid is a common heat dissipation technology in electronic equipment cooling. This study analyzed the interfacial boiling behavior of R134a under different conditions and found that factors such as the initial thickness of the liquid film, solid-liquid interaction force, and initial temperature significantly affect the boiling mode and thermal resistance.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Jinyi Wu, Dongke Sun, Wei Chen, Zhenhua Chai
Summary: A unified lattice Boltzmann-phase field scheme is proposed to simulate dendrite growth of binary alloys in the presence of melt convection. The effects of various factors on the growth are investigated numerically, and the model is validated through comparisons and examinations.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shaokun Ge, Ya Ni, Fubao Zhou, Wangzhaonan Shen, Jia Li, Fengqi Guo, Bobo Shi
Summary: This study investigated the temperature distribution of main cables in a suspension bridge during fire scenarios and proposed a prediction model for the maximum temperature of cables in different lane fires. The results showed that vehicle fires in the emergency lane posed a greater thermal threat to the cables.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Shuang-Ying Wu, Shi-Yao Zhou, Lan Xiao, Jia Luo
Summary: This paper investigates the two-phase flow and heat transfer characteristics of low-velocity jet impacting on a cylindrical surface. The study reveals that the heat transfer regimes are non-phase transition and nucleate boiling with the increase of heat transfer rate. The effects of jet impact height and outlet velocity on local surface temperatures are pronounced at the non-phase transition stage. The growth rates of heat transfer rate and liquid loss rate increase significantly from the non-phase transition to nucleate boiling stage.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Emad Hasani Malekshah, Wlodzimierz Wlodzimierz, Miros law Majkut
Summary: Cavitation has significant practical importance and can be controlled by air injection. This study investigates the natural to ventilated cavitation process around a hydrofoil through numerical and experimental methods. The results show that the location and rate of air injection have a meaningful impact on the characteristics of cavitation.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Feriel Yahiat, Pascale Bouvier, Antoine Beauvillier, Serge Russeil, Christophe Andre, Daniel Bougeard
Summary: This study explores the enhancement of mixing performance in laminar flow equipment by investigating the generation of chaotic advection using wall deformations in annular geometries. The findings demonstrate that the combined geometry can achieve perfect mixing at various Reynolds numbers.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Hui He, Ning Lyu, Caihua Liang, Feng Wang, Xiaosong Zhang
Summary: This study investigates the condensation, frosting, and defrosting processes on superhydrophobic surfaces with millimeter-scale structures. The results reveal that the structures can influence the growth and removal of frost crystals, with the bottom grooves creating a frost-free zone and conical edges promoting higher frost crystal heights. Two effective methods for defrosting are observed: hand-lifting the groove and airfoil retraction contraction on protruding structures. This research provides valuable insights into frost formation and defrosting on millimeter-structured superhydrophobic surfaces, with potential applications in anti-frost engineering.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Thiwanka Arepolage, Christophe Verdy, Thibaut Sylvestre, Aymeric Leray, Sebastien Euphrasie
Summary: This study developed two thermal concentrators, one with a 2D design of uniform thickness and another with a 3D design, using the coordinate transformation technique and metamaterials. By structuring the thermal conductor, the desired local density-heat capacity product and anisotropic thermal conductivities were achieved. The homogenized thermal conductivities were obtained from finite element simulations and cylindrical symmetry consideration. A 3D concentrator was fabricated using 3D metal printing and characterized using a thermal camera. Compared to devices that solely consider anisotropic conductivities, the time evolution characteristics of the metadevice designed with coordinate transformation were closer to those of an ideal concentrator.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
Article
Thermodynamics
Liangyuan Cheng, Qingyang Wang, Jinliang Xu
Summary: In this study, we investigated the supercritical heat transfer of CO2 in a horizontal tube with a diameter of 10.0 mm, covering a wide range of pressures, mass fluxes, and heat fluxes. The study revealed a non-monotonic increase in wall temperatures along the flow direction and observed both positive and negative wall temperature differences between the bottom and top tube. The findings were explained by the thermal conduction in the solid wall interacting with the stratified-wavy flow in the tube.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2024)
