Article
Materials Science, Multidisciplinary
Wenjian Lu, Hui Xing, Rui Hu, Qingyu Zhang, Zhengjun Yao
Summary: The wettability between solid and porosity has a significant impact on the growth of dendrites and pore morphology during the solidification of alloys. Using a two-dimensional coupled lattice Boltzmann-cellular automata-finite-difference (LB-CA-FD) model, this study simulates the effect of wettability on dendritic and pore morphologies. The results indicate that wettability strongly influences the formation of dendritic and bubble structures.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Chemistry, Multidisciplinary
Shiyu Zhang, Meirong Zhao, Yinguo Huang, Yukai Sun, Chuntian Liu, Meike Yu, Yelong Zheng
Summary: When a droplet contacts a solid surface, it spreads over to minimize surface energy. In this study, a highly sensitive photoelectric method is used to quantify the adhesion force and spreading radius during droplet spreading. The adhesion force is measured by an optical lever and the spreading radius is measured by an ultrafast electrical method. The maximum spreading radius and adhesion force are obtained through this technique, and the results are confirmed by numerical simulations using the lattice Boltzmann solver. This study provides a new experimental technique to study droplet spreading dynamics and can contribute to the development of new techniques.
Article
Thermodynamics
Patrick Sullivan, Duncan Dockar, Ryan Enright, Matthew K. Borg, Rohit Pillai
Summary: This study investigates the growth process of heterogeneous vapor bubbles under different surface conditions and finds that surface wettability plays an important role in the shape and dynamics of the bubbles. These findings have the potential to improve the performance of systems involving phase change from liquid to vapor.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2023)
Article
Engineering, Environmental
Wen-Tao Jiang, Qian Luo, Hai-Long Liao, Yong Luo, Feng-Xiang Qie, Qing-Feng Tan, Zhi Qian
Summary: Bubble fragmentation plays a crucial role in various industrial applications. Incorporating fibers enhances fluid turbulence and facilitates bubble fragmentation in gas-liquid flows, but the mechanism of bubble cutting with fibers is not fully understood. In this study, we investigated the underlying mechanisms and characteristics of bubble fragmentation by varying solution type, bubble impact velocity, fiber diameter, and surface wettability. Based on experimental observations, a mathematical model describing the bubble fragmentation pattern was developed. Further analysis through CFD simulations helped explain the results observed in our visual experiments, providing insights into the optimal design of fibers for enhanced gas-liquid interface interactions.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Thermodynamics
Jiejin Cai, Ziqi Gong, Zhihong Tang, Chenjie Qiu, Bing Tan
Summary: Surfaces with mixed wettability patterns have the potential to improve energy conversion efficiency of industrial equipment by affecting bubble dynamics and flow field properties. This study investigates the thermodynamic, bubble dynamics, and water velocity vector field of bubbles generated on designed surfaces using various measurement techniques. The results demonstrate that the wettability and width of the pattern significantly impact bubble formation modes, heat transfer, bubble floatation, and water motion.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
S. Y. Guan, Z. H. Zhang, R. Wu, X. K. Gu, C. Y. Zhao
Summary: The impacts of nano-porous structures on boiling heat transfer characteristics are revealed through theoretical and modeling analysis. The results show that the boiling inception time is proportional to the void volume to solid surface area ratio, and the critical heat flux is a power law function of pore size. Molecular dynamics simulations further validate the theoretical analysis, showing a power law relation between boiling inception time and void volume to solid surface area ratio, and an exponent of 1.232 in the power law relation between critical heat flux and pore size.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2022)
Article
Thermodynamics
Jiejin Cai, Ziqi Gong, Bing Tan
Summary: This study investigated the bubble dynamics on vertical surfaces with different wettability through experimental and theoretical analysis. The results showed that the growth and detachment of bubbles were affected by the subcooling degree, even a small difference could significantly impact the bubble volume reduction. When the fluid was saturated or the subcooling was negligible, the bubble tightly adhered to the surface before sliding upwards.
INTERNATIONAL JOURNAL OF THERMAL SCIENCES
(2023)
Article
Thermodynamics
Yiyi Chen, Rong Fu, Yuying Yan
Summary: This study investigates the improvement of pool boiling heat transfer on grooved surfaces by selectively coating highly hydrophilic or hydrophobic nanoparticles. Three wetting configurations were used, including complete hydrophilicity, hydrophobicity, and 3D heterogeneous wettability. The 3D heterogeneous configuration showed the highest increase in heat transfer coefficient compared to the other two configurations. The combination of hydrophilic grooves and hydrophobic fin tops effectively prevented bubble coalescence at higher heat flux, which couldn't be achieved by complete hydrophilicity alone.
INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER
(2022)
Article
Engineering, Environmental
Yong Qi, Hong Yang, Shufen Zhang
Summary: Understanding and controlling the behavior of bubbles on the surface of macroporous materials is crucial for industrial catalysis, mass transfer, and membrane science. Using shape-memory photonic crystals as supports, researchers have successfully revealed the evolution of bubbles on the surface and analyzed it through structural color. This research has led to insights that could inspire the development of next-generation interfacial catalysts and mass transfer interfaces.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Multidisciplinary
Chunhui Zhang, Xiao Xiao, Ziwei Guo, Lei Jiang, Cunming Yu
Summary: Researchers have investigated the formation, transportation, and spreading of bubbles on solid surfaces with specific wettability. However, bubble transfer on wettability-heterogeneous surfaces has been rarely reported. This study investigates the behavior of bubble transfer on such surfaces and explores their application in micro-bubble collection and H-2 bubble removal in water splitting.
CHINESE CHEMICAL LETTERS
(2023)
Article
Physics, Fluids & Plasmas
Konstantin Leonov, Iskander Akhatov
Summary: The dynamics of a single cavitation bubble in a spherical liquid cell surrounded by an infinite elastic solid is influenced by volume confinement, with cavitation being completely suppressed at liquid cell sizes smaller than a critical size. The study derives a system of equations for the dynamics of a confined bubble, considering various factors, and conducts linear and nonlinear analysis to determine the dynamic response.
Article
Mechanics
Peng Xu, Shuhong Liu, Zhigang Zuo, Zhao Pan
Summary: This paper investigates the onset criteria and dynamics of large cavitation bubbles in a tube, proposing a new cavitation number to describe the maximum bubble length. Both criteria for large cylindrical cavitation bubbles to occur are established, and a Rayleigh-type model for bubble dynamics in a tube is developed. The analytical results are validated through systematic experiments using a modified apparatus.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Thermodynamics
Mohamad Farhat, Maxime Chinaud, Philippe Nerisson, Olivier Vauquelin
Summary: Bubble-bubble interactions affect the formation and size distribution of bubbles in industrial applications. By increasing the flow rate, different patterns of bubbling are observed and classified, revealing the weak applicability of conventional models in estimating bubbles sizes at high flow rates.
INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
(2021)
Article
Engineering, Aerospace
S. Mahmood Mousavi, Bok Jik Lee
Summary: A thorough understanding of bubble/liquid two-phase flows under microgravity conditions is essential for achieving efficient heat transfer. This study examined the influence of wall wettability on bubble structure movement in a microchannel. Results showed that different wettability led to variations in bubble shape, size, and slug length.
Article
Chemistry, Physical
Mateusz Kruszelnicki, Przemyslaw B. Kowalczuk, Izabela Polowczyk
Summary: Interactions between gas bubbles and solid particles are crucial in industrial processes, and the study aimed to investigate the influence of surface hydrophobicity and zeta potential on the formation of three-phase contact between a single air bubble and planar glass surfaces. The results show that increasing surface hydrophobicity enhances the bubble adhesion effectiveness by increasing both the propagation velocity of the three-phase contact perimeter and its size.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Physics, Fluids & Plasmas
Taku Ashida, Masao Watanabe, Kazumichi Kobayashi, Hiroyuki Fujii, Toshiyuki Sanada
PHYSICAL REVIEW FLUIDS
(2020)
Article
Mechanics
Hiroaki Kusuno, Toshiyuki Sanada
Summary: This paper presents the physical mechanisms for the acceleration and lateral motions of deformable bubbles under stable conditions through numerical simulations. The trailing bubble decreases the drag coefficient relative to a spherical bubble due to increased vorticity generated at the leading bubble surface by its deformation. Additionally, the trailing bubble moves laterally as a result of shear-induced lift force.
INTERNATIONAL JOURNAL OF MULTIPHASE FLOW
(2021)
Article
Engineering, Electrical & Electronic
Atsuki Hosaka, Yuki Mizushima, Satomi Hamada, Ryota Koshino, Akira Fukunaga, Toshiyuki Sanada
Summary: The contact-type cleaning method, which involves direct contact of impurities with brushes or brush-induced fluid flow, is used for brush scrubbing. When applying brush cleaning to nanosized defects in advanced semiconductor manufacturing, it is important to understand the interaction between the brush and scrubbing surface under actual operating conditions. High-speed photography was used to observe the brush volume ratio and brush nodule deformation near the surface, providing insights into efficient nanosized cleaning.
MICROELECTRONIC ENGINEERING
(2022)
Article
Chemistry, Analytical
Yuta Matsumoto, Yuki Mizushima, Toshiyuki Sanada
Summary: In this study, we demonstrate a method for removing gas from small holes using acoustic waves. We investigated the mechanism of liquid filling and gas removal in liquids by changing hole size, wettability, and liquid surface tension. Our experimental results show that combining two different frequencies of acoustic waves can completely remove gas in a short period of time. The formation of droplets or films and the approaching and coalescing of gas columns are the dominant mechanisms during the removal process.
Article
Physics, Applied
Masamitsu Kurashita, Akira Fukunaga, Toshiyuki Sanada, Chikako Takatoh
Summary: This study evaluates the phenomena in the interface between a wet PVA sponge and different materials during a chemical mechanical polishing cleaning process. The torques of a rolling wet PVA sponge were measured to determine the effect of surface free energy on the torques between two materials. The results suggest that increasing the rotational speed of a wet PVA sponge decreases some of the torques generated due to hydrogen bonding component interactions.
JAPANESE JOURNAL OF APPLIED PHYSICS
(2022)
Article
Mechanics
Ryunosuke Adachi, Kazumichi Kobayashi, Hiroyuki Fujii, Toshiyuki Sanada, Masao Watanabe
Summary: In this study, we investigated the possibility of wetting failure by examining the rim instability of the liquid sheet ejected after a water drop impacted a dry solid surface. This was made possible through the use of an ultra-high-speed camera.
Article
Instruments & Instrumentation
Yoshia Miyachi, Hajime Furuichi, Toshiyuki Sanada, Yuki Mizushima
Summary: In this study, a phase detection method using a film-based optical waveguide was developed, which can measure the simultaneous local multipoint and high temporal resolution phase detection on a smooth surface. The proposed method can diagnose the dispersed two-phase flow near the wall inside of machines or curved tubes.
REVIEW OF SCIENTIFIC INSTRUMENTS
(2022)
Article
Engineering, Electrical & Electronic
Shota Suzuki, Yuki Mizushima, Satomi Hamada, Ryota Koshino, Akira Fukunaga, Toshiyuki Sanada
Summary: Research finds that cross-contamination occasionally occurs during the cleaning process in semiconductor manufacturing using polyvinyl acetal (PVA) brushes due to the re-deposition of contaminants. To understand why contamination patterns in the form of nodules still occur even when brushes and surfaces are in relative motion, the contact path of roller brush nodules on a rotating plate was studied. The experimental results showed that the stamped contacts of the nodule shape coincide with the recontamination points, occurring in a certain area on the wafer.
MICROELECTRONIC ENGINEERING
(2023)
Article
Nuclear Science & Technology
Hajime Furuichi, Kenichi Katono, Yuki Mizushima, Toshiyuki Sanada
Summary: This study aims to improve the accuracy of measuring liquid film thickness using an optical waveguide film sensor. The sensor detects light reflection at the liquid film surface with high spatial resolution. A signal processing method is proposed to remove measurement errors caused by the curved surface of the liquid film. Numerical investigation shows that the curved surface has negligible effects on the measurement accuracy up to a certain surface curvature.
NUCLEAR SCIENCE AND ENGINEERING
(2023)
Article
Polymer Science
Yoshinori Jinbo, Yuki Mizushima, Toshiyuki Sanada
Summary: This study numerically predicted and controlled the flow of liquid film and the distribution of chemical solution on a rotating disk in single wafer processing using the open-source program OpenFOAM. The obtained results agreed with the literature.
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
(2022)
Article
Polymer Science
Atsuki Hosaka, Tsubasa Miyaki, Yuki Mizushima, Satomi Hamada, Ryota Koshino, Akira Fukunaga, Toshiyuki Sanada
Summary: This study investigates nodule deformation and contact area during PVA roller-type brush scrubbing and finds that different brush contact types have a significant impact on the cross-contamination region.
JOURNAL OF PHOTOPOLYMER SCIENCE AND TECHNOLOGY
(2021)
Article
Physics, Fluids & Plasmas
Hiroaki Kusuno, Toshiyuki Sanada
Summary: The research reveals that deformable bubbles repel each other without kissing under certain conditions, demonstrating the flow structures and shapes through experimental and numerical analysis. The findings highlight how the curvature and velocity inside the gap impact the behavior of interacting bubbles, with the emergence of a double-threaded wake indicating repulsion regardless of attraction or repulsion of the bubbles.
Proceedings Paper
Engineering, Mechanical
Yuki Furuya, Toshiyuki Sanada, Masao Watanabe
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5
(2019)
Proceedings Paper
Engineering, Mechanical
Hiroaki Kusuno, Toshiyuki Sanada
PROCEEDINGS OF THE ASME/JSME/KSME JOINT FLUIDS ENGINEERING CONFERENCE, 2019, VOL 5
(2019)
Article
Materials Science, Multidisciplinary
Keishi Yamada, Yuki Mizushima, Satomi Hamada, Akira Fukunaga, Hirokuni Hiyama, Toshiyuki Sanada
ECS JOURNAL OF SOLID STATE SCIENCE AND TECHNOLOGY
(2019)
Article
Engineering, Chemical
Qing Han, Mengqing Shi, Linkai Han, Di Liu, Mingwei Tong, Yuxin Xie, Zhonghua Xiang
Summary: Developing highly efficient bifunctional oxygen electrocatalysts is crucial for zinc-air flow batteries. Metal-organic frameworks (MOFs) and covalent organic polymers (COPs) have emerged as promising alternatives due to their designable and controllable atomic-level structures. However, their catalytic performances are limited by conductivity and catalytic activity. In this study, nanosheet FeNi-MOF and iron phthalocyanine rich COP hybrid materials are assembled through the pi-pi stacking effect to create highly efficient bifunctional electrocatalysts. The resulting catalyst exhibits superior catalytic performance and stability, making it a promising candidate for zinc-air flow batteries.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Daria Grigorash, Dmytro Mihrin, Rene Wugt Larsen, Erling H. Stenby, Wei Yan
Summary: The article introduces a new approach to describe the cross-association between molecules, allowing for the simulation of weakly bound molecular complexes with different conformations in mixtures. By incorporating this approach into the equation of state, accurate predictions of vapor-liquid equilibrium and liquid-liquid equilibrium can be made. The new method is validated through experiments on alcohol and acid mixtures, with the results compared to experimental data, demonstrating its accuracy and reliability.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Mohammed Al-Sharabi, Daniel Markl, Vincenzino Vivacqua, Prince Bawuah, Natalie Maclean, Andrew P. E. York, Axel Zeitler
Summary: This study used terahertz pulsed imaging to investigate the transport process of different solvents into ceramic catalytic materials. The results showed that the heating rate of the samples influenced the water transport rate, while the viscosity of 1-octanol slowed down its transport.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chukwunonso Anyaoku, Sati Bhattacharya, Rajarathinam Parthasarathy
Summary: This study aimed to enhance understanding of settling dynamics in viscoelastic fluids by developing a semi-empirical correlation and a dimensionless ratio, which accurately described the characteristics of settling suspensions.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Antti I. Koponen, Janika Viitala, Atsushi Tanaka, Baranivignesh Prakash, Olli-Ville Laukkanen, Ari Jasberg
Summary: This study focuses on the development of foam application chemicals for the paper and board industry. The research explores the rheology of the polyvinyl alcohol foam used in the process. Measurements were conducted to determine the foam viscosity and slip flow. The results suggest that slip flow contributes significantly to the total flow rate, and the obtained viscosity and slip models provide a solid foundation for industrial processes.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Dalei Sun, Jinghui Cai, Yating Yang, Zhiwu Liang
Summary: In this study, Fe-doped alpha-Bi2O3 catalysts with different Fe/Bi molar ratios were synthesized and utilized in the carbonylation of isobutyl amine with CO2. The results showed that Fe doping significantly enhanced the catalytic abilities of alpha-Bi2O3.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Yuan Tian, Xinxin Wang, Yanrong Liu, Wenping Hu
Summary: This paper predicts the solubility of nitrogen gas in ionic liquids (ILs) using two quantitative structure-property relationship (QSPR) models. By combining machine learning methods and ionic fragments contribution method, the accuracy and reliability of the prediction models are improved.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Liwang Wang, Wei Liu, Pan Yang, Yulong Chang, Xiaoxu Duan, Lingyu Xiao, Yaoming Hu, Jiwei Wu, Liang Ma, Hualin Wang
Summary: This study investigates the effective phase interfacial area (ae) of hydro-jet cyclones at different injection angles. The results show that a 45 degrees upward incidence angle yields the most favorable flow field characteristics for efficient mass transfer. The significant enhancement in ae of the hydro-jet cyclones offers the advantage of reducing equipment volume and cost savings.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Chuanjun Wu, Jiangzhi Chen, Jiyue Sun, I-Ming Chou, Shenghua Mei, Juezhi Lin, Lei Jiang
Summary: In this study, the solubility of H2S hydrate in water was measured using Raman spectroscopy. The results showed that the solubility increases with temperature under certain equilibrium conditions, and the solubility also depends on pressure and temperature under different equilibrium conditions. A thermodynamic model based on the van der Waals-Platteeuw theory was developed to predict the solubility, demonstrating its accuracy.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Lorenzo Brivio, Serena Meini, Mattia Sponchioni, Davide Moscatelli
Summary: This study investigates the influence of three main parameters and proposes a kinetic model to predict the optimal operating conditions for high yield of dimethyl terephthalate (DMT) in the chemical recycling process of polyethylene terephthalate (PET).
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Hongju Lin, Fanhui Liao, Yanchang Chu, Mingyu Xie, Lun Pan, Yuanyuan Wang, Lijian Leng, Donghai Xu, Le Yang, Gangfeng Ouyang
Summary: A honeycomb NiCo/C-Na catalyst with a micro-meso-macroporous structure has been fabricated and shown to have significantly higher catalytic activity for the decarboxylation of fatty acids. It also proves to be efficient in upgrading sludge HTL bio-crude, resulting in a biofuel with decreased viscosity and increased density.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Xiaoxian Li, Rui Li, Min Lin, Mingde Yang, Yulong Wu
Summary: A series of coated non-noble metal porous carbon catalysts were synthesized and applied to the aqueous-phase deoxygenation of algal bio-oil. One of the catalysts showed excellent deoxygenation selectivity and catalytic activity at 250 degrees C. The catalyst exhibited good hydrothermal stability and the reaction mechanism was proposed based on product analysis and active site analysis.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
M. V. Chudakova, M. V. Popov, P. A. Korovchenko, E. O. Pentsak, A. R. Latypova, P. B. Kurmashov, A. A. Pimenov, E. A. Tsilimbaeva, I. S. Levin, A. G. Bannov, A. V. Kleymenov
Summary: A series of catalysts with different potassium contents were prepared using solution combustion synthesis and characterized using various techniques. The results showed that the potassium content affected the phase composition and texture of the catalysts. The addition of a small amount of potassium resulted in a change in particle size distribution, leading to higher hydrogen yield. The Ni-1%K2O/Al2O3 catalyst exhibited the highest hydrogen yield at temperatures of 675 and 750 degrees Celsius.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Aliakbar Roosta, Nima Rezaei
Summary: In this study, we modified the electrolyte cubic plus association equation of state (e-CPA EoS) and integrated it with two electrical conductivity models to estimate the electrical conductivity of 11 monovalent electrolyte solutions in water. The modified e-CPA model demonstrated better performance and the hybridization with electrical conductivity models resulted in two predictive models for estimating the electrical conduction of dilute and concentrated electrolyte solutions. These predictive models showed relative average percentage deviations (AARD) of 11.15% and 13.87% over wide ranges of temperature and electrolyte concentration.
CHEMICAL ENGINEERING SCIENCE
(2024)
Article
Engineering, Chemical
Haoren Niu, Jianzheng Wang, Qingzhu Jia, Qiang Wang, Jin Zhao, Fangyou Yan
Summary: A study developed two quantitative structure-property relationship models for the complexation performance of alpha- and beta-cyclodextrins and validated their stability and predictive ability through internal and external validation. The models showed robustness and satisfactory performance, as demonstrated by the experimental results and model validations. These models can effectively predict the binding constants between cyclodextrins and various types of molecules, providing valuable tools for cyclodextrin design.
CHEMICAL ENGINEERING SCIENCE
(2024)
