Article
Thermodynamics
Liansheng Liu, Xuanchen Liu, Wenqi Jia, Wenjia Ren, Liang Tian, Runze Duan
Summary: This study investigates the evaporation characteristics of droplets attached to a high temperature wall, revealing the intense evaporation process in the boiling regime and the transition from static evaporation to nucleate boiling. The study verifies the feasibility of numerical simulation for studying droplet evaporation in the boiling regime, which is consistent with experimental results.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Yuhui Zhang, Mengsen Zhang, Jianqin Zhu, Zhi Tao, Lu Qiu
Summary: Impinging high frequency microscale droplet stream on a high temperature substrate is an effective method for point heat sink. The boiling patterns and heat transfer characteristics are influenced by the flowrate and frequency of the droplet stream. Increasing the flowrate or frequency can elevate the Leidenfrost temperature.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Xiaojing Ma, Jinliang Xu, Liang Gong, Haoran Hong, Chunlei Cao, Chaoqiang Wang
Summary: We investigated droplet evaporation on heater surfaces with different thermal conductivities using the phase change lattice Boltzmann model. The evaporation curves revealed four regimes: film evaporation, nucleate boiling, transition, and Leidenfrost. We found that higher thermal conductivity does not always accelerate droplet evaporation. In transition regime, lower thermal conductivity enhances droplet evaporation by triggering the second contact between droplet and heater.
APPLIED THERMAL ENGINEERING
(2023)
Article
Physics, Applied
Yukai Lin, Fuqiang Chu, Qiang Ma, Xiaomin Wu
Summary: This study focuses on boiling regimes below the Leidenfrost point and discovers a gyroscopic rotation phenomenon of boiling droplets on various surfaces, attributed to the viscous stress from vapor/bubble flows in surface microstructures. The rougher surface structures and larger solid-liquid contact area are more likely to generate gyroscopic rotations. The theoretical model confirms the effect of substrate temperature (boiling regime) on the spinning rate of boiling droplets and further validates the proposed mechanism of gyroscopic rotation.
APPLIED PHYSICS LETTERS
(2021)
Article
Construction & Building Technology
Jia-Ning Fan, Yang Yang, Yi Wang, Zhixiang Cao, Ningbin Zhu, Bo Qian, Songheng Wu, Yu Zhou
Summary: This study proposed a twin boundary curtain ventilation (TBCV) system to assist an exhaust hood, aiming to improve the limitations of traditional hood position and control efficiency. Experimental and numerical research showed that the TBCV system had low flow rate, good droplet control effect, and flexibility in installation.
JOURNAL OF BUILDING ENGINEERING
(2022)
Article
Thermodynamics
Konghua Yang, Kaidiao Jin, Jiawei Xiong, Yuchao Luo, Yunhong Liang, Chunbao Liu
Summary: This study developed a novel 3D method to address the Leidenfrost effect by studying the synergies of droplet velocity and surface temperature. A computational fluid dynamics simulation and high-speed video testing were conducted to investigate the dynamics of vapor and heat transfer near the Leidenfrost point. The empirical correlation between the Leidenfrost point temperature and Weber number was determined.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Chemical
Tianjiao Wang, Xingsen Mu, Shengqiang Shen, Gangtao Liang
Summary: In this study, the sessile droplet boiling on a micropillar array surface in the nucleate boiling regime is comprehensively investigated using a three-dimensional lattice Boltzmann model. The effects of micro-pillar size on bubble behaviors inside droplet are discussed in detail.
CHEMICAL ENGINEERING SCIENCE
(2023)
Article
Thermodynamics
Zhaoxuan Tang, Tingfang Yu, Zhaoqing Ke, Bozhen Lai, Yan Gao, Ying Zhang
Summary: This experimental study investigates the thermal effects induced by a two-component droplet of propylene glycol water impinging on a hot substrate. The visualization experiment reveals that this phenomenon is characterized by a shift in the boiling regime of the droplets, which undergo different transformation patterns with changes in surface temperature and propanediol concentration. A temperature-concentration regime map is created based on high-speed camera sequence images, and qualitative analysis is performed on the causes and conditions of the boiling transformation. The time of boiling regime transformation can be determined by analyzing the secondary droplets, and the effects of different boiling regimes and propylene glycol concentrations on the size and velocity distribution of secondary droplets are briefly investigated.
APPLIED THERMAL ENGINEERING
(2023)
Review
Chemistry, Multidisciplinary
Chenrui Li, Beomsu Kim, Jonghun Yoon, Soumyadip Sett, Junho Oh
Summary: This comprehensive review summarizes previous research and emphasizes the structures and working principles of directional wetting surfaces. Researchers have employed different strategies to manipulate the wetting behavior of liquids through both passive and active control mechanisms. Passive directional transport surfaces enable large-scale and continuous fluid control, while active directional wetting surfaces offer flexibility and precise control of liquid movement.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Thermodynamics
Yunjie Xu, Linlin Tian, Chunling Zhu, Ning Zhao
Summary: In this study, a three-dimensional numerical simulation based on the lattice Boltzmann method (LBM) is used to analyze the dynamic and thermodynamic behaviors of droplet impingement and boiling on heated surfaces. The simulation successfully captures the process of vapor bubble nucleation, growth, coalescence, and even burst at the droplet interface. Four typical regimes including film evaporation, nucleate boiling, transition boiling, and film boiling are numerically reproduced. The study reveals the importance of vapor bubble dynamics in heat transfer performance and identifies three different rebound types.
APPLIED THERMAL ENGINEERING
(2023)
Article
Thermodynamics
Mengsen Zhang, Jianqin Zhu, Zhi Tao, Lu Qiu
Summary: A quantitative phase diagram approach is proposed in this paper to determine the intensity of heat transfer during droplet impingement boiling by measuring the temperature evolution in the substrate, revealing richer information compared to traditional phase diagram method.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Thermodynamics
Yuheng Zhang, Sophie Wang
Summary: The critical heat flux (CHF) is an important parameter in pool boiling that limits the heat flux and temperature. This study proposes a vapor management approach using a chimney-like vapor shroud during the pool boiling process. The results show that the CHF increases with the length of the vapor shroud, reaching a maximum value at a specific gap. The increase in CHF is believed to be caused by improved liquid feeding and vapor release dynamics.
APPLIED THERMAL ENGINEERING
(2022)
Article
Thermodynamics
Zhen Cao, Bengt Sunden, Zan Wu
Summary: The present study investigates boiling heat transfer enhancement on coated surfaces using mechanistic models. The results show that the coatings on copper surfaces significantly increase the critical heat flux and heat transfer coefficient of deionized water, with the coated surface providing more active nucleation sites. Based on these insights, a heat transfer model is established and the critical heat flux is explored experimentally and theoretically.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Bin Li, Abbasali Abouei Mehrizi, Shiji Lin, Sangwoo Joo, Longquan Chen
Summary: The impact dynamics of viscoelastic droplets on a superhydrophobic surface beyond the boiling temperature was studied, with findings suggesting that surface temperature and polymer concentration have varying effects on droplet behavior. Additionally, temperature increase or polymer concentration decrease can accelerate droplet retraction speed.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Nanoscience & Nanotechnology
Yiliang Li, Jinmei Huang, Jiang Cheng, Shouping Xu, Pihui Pi, Xiufang Wen
Summary: The wedge-shaped Ag/Cu surface with a wettability gradient was able to enhance droplet motion and remove the droplets away from the surface effectively. The theoretical evaluation of the driving force from the wettability gradient length was conducted to understand its impact on the movement.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Education, Scientific Disciplines
Carmen Cheng, Matthew Guy, Alessandro Narduzzo, Kei Takashina
EUROPEAN JOURNAL OF PHYSICS
(2015)
Article
Multidisciplinary Sciences
V. T. Renard, B. A. Piot, X. Waintal, G. Fleury, D. Cooper, Y. Niida, D. Tregurtha, A. Fujiwara, Y. Hirayama, K. Takashina
NATURE COMMUNICATIONS
(2015)
Article
Electrochemistry
Rosemary Brown, Elena Madrid, Remi Castaing, James M. Stone, Adam M. Squires, Karen J. Edler, Kei Takashina, Frank Marken
Article
Physics, Applied
Y. Niida, K. Takashina, A. Fujiwara, T. Fujisawa, Y. Hirayama
APPLIED PHYSICS LETTERS
(2009)
Article
Physics, Applied
K. Takashina, K. Nishiguchi, Y. Ono, A. Fujiwara, T. Fujisawa, Y. Hirayama, K. Muraki
APPLIED PHYSICS LETTERS
(2009)
Article
Physics, Applied
Yoshitaka Niida, Kei Takashina, Yukinori Ono, Akira Fujiwara, Yoshiro Hirayama
APPLIED PHYSICS LETTERS
(2013)
Article
Chemistry, Physical
Y. Ono, M. A. H. Khalafalla, K. Nishiguchi, K. Takashina, A. Fujiwara, S. Horiguchi, H. Inokawa, Y. Takahashi
APPLIED SURFACE SCIENCE
(2008)
Article
Physics, Applied
K. Takashina, Y. Niida, V. T. Renard, A. Fujiwara, T. Fujisawa, Y. Hirayama
INTERNATIONAL JOURNAL OF MODERN PHYSICS B
(2009)
Article
Thermodynamics
Alexander Cole, Benjamin Jury, Kei Takashina
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2015)
Article
Materials Science, Multidisciplinary
K. Takashina, Y. Niida, V. T. Renard, B. A. Piot, D. S. D. Tregurtha, A. Fujiwara, Y. Hirayama
Article
Physics, Multidisciplinary
K. Takashina, Y. Niida, V. T. Renard, A. Fujiwara, T. Fujisawa, K. Muraki, Y. Hirayama
PHYSICAL REVIEW LETTERS
(2011)
Article
Engineering, Electrical & Electronic
K. Takashina, M. Nagase, K. Nishiguchi, Y. Ono, H. Omi, A. Fujiwara, T. Fujisawa, K. Muraki
SEMICONDUCTOR SCIENCE AND TECHNOLOGY
(2010)
Article
Multidisciplinary Sciences
V. T. Renard, I. Duchemin, Y. Niida, A. Fujiwara, Y. Hirayama, K. Takashina
SCIENTIFIC REPORTS
(2013)
Article
Physics, Applied
James M. Arter, David J. Cleaver, Kei Takashina, Andrew T. Rhead
APPLIED PHYSICS LETTERS
(2018)