Article
Thermodynamics
Jorge Duarte Benther, Juan Diego Pelaez Restrepo, Cameron Stanley, Gary Rosengarten
Summary: This study investigates the interaction between droplets and surfaces with different wettabilities in spray cooling, comparing the heat transfer performance of uncoated and coated surfaces. Results show that the uncoated surface has higher heat transfer rates compared to the coated one, with higher droplet velocities leading to increased heat transfer. The reduced cooling performance of successive droplets on uncoated surfaces is due to thermal resistance and damping effects from the first droplet.
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
Thermodynamics
Jessica Kansy, Thomas Kalmbach, Andre Loges, Joachim Treier, Thomas Wetzel, Achim Wiebelt
Summary: This paper introduces a method to determine the area contributing to heat transfer in spray and jet impingement cooling below boiling point, using temperature measurement with an infrared camera. The study focused on the heat transfer areas generated by different nozzle types and their behavior under varying pressure, distance, and inclination.
APPLIED THERMAL ENGINEERING
(2021)
Article
Thermodynamics
Xinwen Chen, Aimin Du, Zhaohua Li, Kun Liang, Xiang Wang, Meng Zhang, Yucheng Wang
Summary: This study experimentally investigated the effects of vibration on the heat transfer mechanism of single-phase spray cooling. It found that various vibration parameters have a significant impact on the heat transfer performance.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Energy & Fuels
Feixiang Chang, Hongliang Luo, Cheng Zhan, Keiya Nishida, Youichi Ogata
Summary: The study investigated the droplet behavior of impinging spray in direct-injection spark-ignition engines. The results showed that with an increase in injection pressure, droplet velocity at the spray tip increased dramatically, and the atomization was greatly improved. Moreover, an increase in injection pressure led to a wider range of Weber number distribution of droplets.
Article
Chemistry, Multidisciplinary
Yile Wang, Yage Zhao, Lijie Sun, Abbasali Abouei Mehrizi, Shiji Lin, Jianwei Guo, Longquan Chen
Summary: This paper investigates the bouncing behavior of water droplets on superhydrophobic surfaces and finds a nonmonotonic relationship between the restitution coefficient and the Weber number. Droplet-surface friction limits the rebound height, and above a critical value, viscous friction dominates. Semiempirical formulas are proposed to describe the restitution coefficient, allowing for the prediction of successive rebounds.
Article
Thermodynamics
Fengchao Li, Ying Hu, Yu Fu, Guangtao Li, Ronggang Wei, Chao Li, Chunbo Hu
Summary: An experimental system was designed to investigate the impact process of molten Al droplets on the walls of a combustion chamber. Empirical correlations for the residence time and spreading diameter of the droplets were established, and a theoretical model was developed to analyze the energy distribution during the collision. The results provide a theoretical basis for the design of thermal protection systems for solid rocket motors.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Chemistry, Physical
Kaikai Li, Yingxi Xie, Biao Tang, Huanwen Ding, Xiaokang Mei, Min Yu, Chunbao Li, Longsheng Lu
Summary: By constructing surface microstructures and improving their hydrophobicity, severe adhesion of biological fluids on surgical electrodes can be effectively reduced. Inspired by purple orchid leaves with self-cleaning properties, the dynamic behavior of water and biological droplets on superhydrophobic microstructured surfaces (SMSs) heated over 100°C was studied. The SMSs with Cassie-Baxter state showed a pseudo-Leidenfrost effect for water droplets, and the dynamic evolution mechanism of plasma droplets on heated surfaces was proposed. The findings contribute to understanding the anti-adhesion mechanism of surgical electrodes at the microscopic level.
SURFACES AND INTERFACES
(2023)
Article
Construction & Building Technology
Cristina Sotelo-Salas, Carlos Escobar-del Pozo, Carlos J. Esparza-Lopez
Summary: This study used numerical simulations to determine the design parameters of an opaque double skin facade, including the air cavity width and spray water characteristics. The findings suggest that the best design for a double skin facade in hot-arid conditions with an evaporative cooling strategy includes an air cavity width of 0.4 m, a droplet size of 25 μm, and a separation of 0.6 m between each nozzle.
JOURNAL OF BUILDING ENGINEERING
(2021)
Article
Chemistry, Physical
Dmitry V. Zaitsev, Dmitry P. Kirichenko, Oleg A. Kabov, Vladimir S. Ajaev
Summary: Experimental studies and mathematical models were used to investigate the levitation of microscale droplets over an evaporating liquid layer, showing the dependence of levitation height on droplet size. The experimental data for various conditions collapsed onto a single curve predicted by the model.
Article
Thermodynamics
Jorge Duarte Benther, Vrushub Bhatt, Juan Diego Pelaez Restrepo, Cameron Stanley, Gary Rosengarten
Summary: High heat generation in the electronics industry hampers further innovations. Spray cooling is a promising technique for cooling high-temperature objects. This study investigates the fluid dynamics and heat transfer of multiple droplet impingement, providing insights for future spray cooling system design and optimization.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Mechanics
Assem Elzaabalawy, Shaker A. Meguid
Summary: This study investigates the mechanisms associated with the impingement of supercooled water droplets on superhydrophobic and icephobic surfaces using numerical simulations. The model predictions are in excellent agreement with experimental findings, and the results are crucial for anti-icing applications.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2022)
Article
Thermodynamics
Xuanchen Liu, Liansheng Liu, Yuxuan Yang, Bin Liu, Runze Duan
Summary: This paper investigates the evaporative traits of sessile droplets on a hydrophobic surface at constant temperature. The results show that the droplet evaporation time is positively correlated with the initial volume and surface hydrophobicity, but negatively correlated with the surface temperature. The change mode of contact angle is significantly affected by the initial volume and surface temperature, and the contact diameter is significantly affected by surface temperature. Evaporation of droplets on (super)hydrophobic surfaces follows the V 2/3 law and is prone to contact line slip phenomenon.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2023)
Article
Physics, Fluids & Plasmas
Lihui Liu, Bijiao He, Weizong Wang, Guobiao Cai, Peichun Amy Tsai
Summary: This study investigates the impact dynamics of molten salt drops on a heated surface and finds that unlike molecular liquid drops, ionic liquid drops do not exhibit a vapor film under lower Weber numbers and surface temperatures, which can be beneficial for thermal applications such as cooling and coating.
PHYSICAL REVIEW FLUIDS
(2023)
Article
Mechanics
Fangfang Zhang, Jingdan Tang, Geng Chen, Gang Chen
Summary: The dynamics of a binary solution droplet of ionic liquid and water on heated brass porous surfaces were studied. A comparison was made between the droplet dynamics on the porous and impermeable surfaces. The results showed that the spreading diameter of the droplet did not increase on the porous surface, and the penetration time was shorter than the evaporation time on the impermeable surface.
Article
Thermodynamics
Fu-Zhen Zhang, Rui-Na Xu, Pei-Xue Jiang
APPLIED THERMAL ENGINEERING
(2016)
Article
Energy & Fuels
Bo Zhou, Ruina Xu, Peixue Jiang
Article
Green & Sustainable Science & Technology
Xiaolu Li, Peixue Jiang, Ruina Xu, Lingli Wei
INTERNATIONAL JOURNAL OF GREENHOUSE GAS CONTROL
(2016)
Article
Nanoscience & Nanotechnology
Jian-nan Chen, Zhen Zhang, Xiao-long Ouyang, Pei-xue Jiang
NANOSCALE RESEARCH LETTERS
(2016)
Article
Mechanics
Bo Zhou, Peixue Jiang, Ruina Xu, Xiaolong Ouyang
Article
Nanoscience & Nanotechnology
Jian-nan Chen, Zhen Zhang, Xiao-long Ouyang, Pei-xue Jiang
NANOSCALE RESEARCH LETTERS
(2016)
Article
Thermodynamics
Gan Huang, Yinhai Zhu, Zhiyuan Liao, Xiao-Long Ouyang, Pei-Xue Jiang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2017)
Article
Thermodynamics
Xiao-Long Ouyang, Rui-Na Xu, Pei-Xue Jiang
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2017)
Article
Chemistry, Multidisciplinary
Xue Chen, Jiannan Chen, Xiaolong Ouyang, Yu Song, Ruina Xu, Peixue Jiang
Article
Thermodynamics
Jian-nan Chen, Rui-na Xu, Zhen Zhang, Xue Chen, Xiao-long Ouyang, Gao-yuan Wang, Pei-xue Jiang
JOURNAL OF HEAT TRANSFER-TRANSACTIONS OF THE ASME
(2018)
Article
Chemistry, Multidisciplinary
Ce Tu, Wenfu Cai, Xue Chen, Xiaoiong Ouyang, Hui Zhang, Zhong Zhang
Article
Thermodynamics
Haowei Hu, Peixue Jiang, Xiaolong Ouyang, Cheng Zhao, Ruina Xu
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2020)
Article
Engineering, Chemical
Peng Wan, Xiaobin Gu, Xiaolong Ouyang, Shuyu Shi, Baolin Deng, Jiaqi Liu, Paul K. Chu, Xue-Feng Yu
Summary: The study introduces an inexpensive and versatile photothermal membrane made from basalt fibers, which exhibit excellent corrosion resistance in extreme environments and high water evaporation efficiency and energy utilization. The membrane can be hand washed multiple times without efficiency deterioration and easily scaled up to meet commercial needs.
SEPARATION AND PURIFICATION TECHNOLOGY
(2021)
Article
Engineering, Chemical
X. Chen, C. Wang, Y. Song, X. L. Ouyang, P. X. Jiang, S. Q. Shen
DESALINATION AND WATER TREATMENT
(2017)