Article
Acoustics
Lizhang Jin, Weidong Wang, Yanan Tu, Kanghui Zhang, Ziqi Lv
Summary: Ultrasonic flotation is an effective method for floating fine coal by promoting the aggregation of bubbles and coal bubbles. The frequency of standing waves can affect the formation of aggregates and coal recovery rate.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Physics, Fluids & Plasmas
Alen Pavlic, Lorenzo Ermanni, Jurg Dual
Summary: Scattering of an acoustic wave by particles leads to microstreaming, acoustic radiation, and interaction forces. Through numerical study, we find that when particles are small or comparable to the viscous boundary layer, or when one particle has a significantly larger density, microstreaming near the pressure node can cause an attraction between particles. These findings are significant for the acoustic manipulation of nanoparticles and bacteria.
Article
Acoustics
Jinping Wang, Feiyan Cai, Qin Lin, Degang Zhao, Hairong Zheng
Summary: In this study, the acoustic radiation force acting on spherical elastic shells in standing waves was theoretically investigated. It was found that the direction of the acoustic radiation force can be controlled by changing the physical properties of the shells, and the force can be significantly enhanced around resonant frequencies in the relatively low-frequency range.
Article
Chemistry, Physical
H. Wang, P. R. Brito-Parada
Summary: By studying the effect of surface tension in microparticle-laden bubbles, a modified sessile bubble method was used to analyze the surface tension and shape of such bubbles. The results revealed that the surface tension of microparticle-laden bubbles remains consistent regardless of particle size.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Engineering, Industrial
J. F. Wang, Y. Y. Chen, Q. J. Sun, T. Zhang, X. H. Zhan
Summary: The effect of acoustic radiator configuration on bubble-acoustic interaction was investigated through numerical simulation. The results show that the degree of bubble-acoustic interaction relies on the synergic effects of acoustic radiator configuration and the resonant mode of the acoustic field, which can be achieved by adjusting the radiator height. A concave surface acoustic radiator outperforms cylinder and stepped-plate configurations in enhancing the acoustic radiation force, with a dimensionless maximum value of 93.7 attained at a curvature radius of 38 mm. The simulated results agree well with experimental observations on bubble behavior and welding stability. When the resonant height is 50 mm and the curvature radius is 38 mm, the inverse of the variation coefficient of arc voltage is increased to maximum values of 4.3 and 4.9, respectively, indicating superior welding stability. The mechanism of bubble-acoustic interaction provides vital clues for the design of ultrasonic systems.
JOURNAL OF MATERIALS PROCESSING TECHNOLOGY
(2023)
Article
Acoustics
Yuchen Zang, Chang Su, Pengfei Wu, Weijun Lin
Summary: This study investigates the acoustic radiation force on a pair of spherical particles in a Gauss standing wave field, assuming the particle size is much smaller than the wavelength. Analytical expressions for both the primary and secondary radiation forces are derived within the Rayleigh scattering limit. Force and dynamic analyses are conducted for particles located in nodal or anti-nodal planes, and numerical methods are used to solve the equations of motion for computational examples. The results show that the acoustic interaction force dominates in the short-range limit for rigid spheres, while there is no range limit for gas bubbles. This research provides a theoretical guide for precise manipulation of multiple particles in standing acoustic waves.
JOURNAL OF SOUND AND VIBRATION
(2023)
Article
Acoustics
Yuchen Zang, Qin Chang, Xiaozhen Wang, Chang Su, Pengfei Wu, Weijun Lin
Summary: Acoustic levitation is a significant container-free processing method that counteracts gravity using acoustic radiation force. This study provides a systematic analysis of sphere dynamics in a plane standing wave levitation system and calculates the axial and transverse natural oscillation frequencies, emphasizing the influence of gravity on these frequencies. Experimental results confirm the relationship between transverse natural oscillation frequency and sphere density.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2022)
Article
Acoustics
Wolfgang Rueckner, Joseph Peidle, Allen Crockett, Daniel Davis
Summary: Schlieren images reveal that the particle size of solid elastic Styrofoam spheres affects their levitation positions in ultrasonic acoustic standing waves.
JOURNAL OF THE ACOUSTICAL SOCIETY OF AMERICA
(2023)
Article
Engineering, Electrical & Electronic
Jun Long Han, Hong Hu, Qing Yun Huang, Yu Lin Lei
Summary: In this study, an acoustofluidic platform based on standing surface acoustic waves (SSAWs) was established to analyze the influence of droplet contact angle on particle separation. Experimental results demonstrated the importance of reducing the contact angle for achieving better particle separation efficiency.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Chemistry, Physical
Anahita Keshmiri, Sascha Heitkam, Aleksandr Bashkatov, Milad Eftekhari, Kerstin Eckert, Behnam Keshavarzi
Summary: Ultrasound application enhances mass transfer in aqueous systems and can influence sorption processes. Previous studies have reported different impacts of ultrasound on sorption, such as increased desorption or adsorption. This study used low intensity ultrasound to evaluate the sorption process of Triton X-100 on a single bubble surface and found no significant change in surface tension and sorption dynamics after sonication. The results suggest that previous observations may be due to the additional energy input from the acoustic wave rather than the presence of an external acoustic field.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Acoustics
Jinsen Hu, Xuan Lu, Yifan Liu, Jingfei Duan, Yuhang Liu, Jiaxin Yu, Xiaoxiao Zheng, Yuning Zhang, Yuning Zhang
Summary: This paper investigates the jet dynamics and shock waves induced by the cavitation bubble collapsing near two spherical particles using OpenFOAM. The numerical results are validated by experimental data obtained from a high-speed camera cavitation system. The study reveals that bubble split induced by annular jet is the primary feature during bubble collapsing. The localized high pressure produced at the bubble split point is the main reason for jet formation and also serves as the source of the shock waves.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Engineering, Mechanical
Pengzhan Liu, Huiyu Huang, Xu Wang, Qiang Tang, Xiaomin Qi, Songfei Su, Zongheng Xiang, Junhui Hu
Summary: In this study, an innovative acoustic black hole tweezer (ABHT) is proposed and developed by incorporating a one-dimensional acoustic black hole (ABH) structure. The ABHT can easily achieve multiple manipulation functionalities such as trapping and extraction of particles in various fluidic environments. Numerical simulation and experimental evaluation demonstrate the effectiveness of the ABHT, and the potential of employing ABHs in ultrasonic particle manipulation devices and acoustofluidic devices in the future.
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
(2023)
Article
Acoustics
Qinxin Zhou, Meiying Li, Chiyuan Fu, Xuemei Ren, Zheng Xu, Xiaojun Liu
Summary: This study introduces a method to generate tunable bottle beams using an ultrasonic lens, allowing precise adjustment of bottle position with changes in acoustic frequency. The method enables manipulation of single particles or bubbles in liquid, providing a basis for accurate control of bubbles and particles.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Physics, Applied
Ning Ding, Qingyu Ma, Yuzhi Li, Gepu Guo, Juan Tu, Dong Zhang
Summary: OA-AV beams can be constructed by introducing phase delays to traditional transducer arrays for contactless manipulations, showing a linear trajectory. The axial and cross-sectional profiles of the acoustic-vortex beams can be adjusted based on the order and radial offset.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Chemistry, Physical
Weiwang Chen, Xuanlai Chen, Pengdong Wang, Zhiqiang Zhang, Jilong Zhang
Summary: In this study, the influence of coal particle shape in saline solution on the flotation process was systematically investigated, providing a possible solution for the problems caused by ions in the flotation process using saline as the water source.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Energy & Fuels
Guangqian Xu, Yuran Chen, Xiangning Bu, Xianshu Dong, Guangyuan Xie, Yujin Sun
ENERGY SOURCES PART A-RECOVERY UTILIZATION AND ENVIRONMENTAL EFFECTS
(2020)
Article
Engineering, Chemical
Xiangning Bu, Yuran Chen, Guangxi Ma, Yujin Sun, Chao Ni, Guangyuan Xie
Article
Engineering, Chemical
Yuran Chen, Jing Chang, Adrien Bussonniere, Guangyuan Xie, Qingxia Liu
Review
Acoustics
Yuran Chen, Vu N. T. Truong, Xiangning Bu, Guangyuan Xie
ULTRASONICS SONOCHEMISTRY
(2020)
Article
Acoustics
Yuran Chen, Hanrui Zheng, Vu N. T. Truong, Guangyuan Xie, Qingxia Liu
ULTRASONICS SONOCHEMISTRY
(2020)
Article
Acoustics
Yuran Chen, Saeed Chehreh Chelgani, Xiangning Bu, Guangyuan Xie
Summary: The study found that the highest metallurgical responses in flotation were achieved under the highest examined USW frequency (600 kHz), while lower frequencies resulted in poorer outcomes. Observation and theoretical calculations revealed that frequency influences the formation of carrier bubbles and the action of secondary acoustic force during USW-assisted flotation, impacting the success of fine particle flotation.
ULTRASONICS SONOCHEMISTRY
(2021)
Article
Electrochemistry
Yapeng Kong, Yu Xiao, Xuemin Liang, Yuran Chen, Liqiang Wang
Summary: The study found that using Ni-Fe alloy as an inert anode in molten state can effectively promote the direct electro-reduction of V2O3, with a rational formation of oxide scale structure that helps improve the quality of the metal vanadium product.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2021)
Article
Chemistry, Physical
Chao Ni, Shaoqi Zhou, Jixuan Gao, Xiangning Bu, Yuran Chen, Muidh Alheshibri, Guangyuan Xie, Biao Li
Summary: The recovery of spent carbon anode materials is important for environmental protection and resource recycling. This study analyzed the grinding characteristics of spent carbon anode from aluminum electrolysis in both ball mill and rod mill, and compared them using the selective Fuerstenau upgrading curves. The results showed that carbon particles in the spent carbon anode were closely associated with cryolite particles. Ball milling achieved a higher degree of selective comminution compared to rod milling.
PHYSICOCHEMICAL PROBLEMS OF MINERAL PROCESSING
(2022)
Article
Geochemistry & Geophysics
Chao Ni, Shaoqi Zhou, Xiangning Bu, Muhammad Bilal, Fawad Ul Hassan, Yuran Chen, Guangqian Xu, Guangyuan Xie
Summary: This study characterized a lignite sample from Shaanxi Province, China and found that the fluorine in coal is mainly contained in Muscovite and polylithionite, and partly in pyrite. The proposed combination of gravity-flotation separation process effectively reduced the fluorine content in lignite and met the coal standards.
Review
Engineering, Chemical
Yuran Chen, Pan Li, Xiangning Bu, S. Chehreh Chelgani, Yapeng Kong, Xuemin Liang
Summary: During the long-term operation of an aluminum electrolysis cell, there is a continuous infiltration and corrosion of molten salts on the pot lining, resulting in a significant amount of hazardous waste during maintenance. This study explores the properties of spent pot linings (SPL) and presents methods for detoxification and purification. It also examines the strategies for resource utilization and analyzes the current challenges and future prospects for the environmental recycling of SPL.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Engineering, Chemical
Runze Chen, Yuran Chen, Xuemin Liang, Yapeng Kong, Yangyang Fan, Quan Liu, Zhenyu Yang, Feiying Tang, Johnny Muya Chabu, Maru Dessie Walle, Liqiang Wang
Summary: A chemical oxidative exfoliation method has been developed to recycle spent cathode carbon (SCC) and produce decontaminated SCC with high-value graphene oxide (GO)-like carbon structures (SCC-GO), which exhibits excellent adsorption capacity for organic pollutants.
CHINESE JOURNAL OF CHEMICAL ENGINEERING
(2023)
Article
Engineering, Chemical
Yuran Chen, Pan Li, Xiangning Bu, Liqiang Wang, Xuemin Liang, S. Chehreh Chelgani
Summary: This study introduces an innovative method of oxidation-expansion acid leaching (OEAL) to eliminate impurities inside spent pot lining (SPL). The experimental results show that OEAL has the highest efficiency, with a removal rate of 99.36% for impurities. The fundamental mechanisms of impurity removal were systematically studied using different analytical techniques.
SEPARATION AND PURIFICATION TECHNOLOGY
(2022)
Article
Chemistry, Analytical
Yujin Sun, Ning Jiang, Xianshu Dong, Yuping Fan, Maoqing Yang, Peng Xiong, Yuran Chen
Summary: In this study, the adsorption behavior of cationic polystyrene nanoparticles on amorphous carbon and SiO2 surfaces under different Na+ ion concentrations was investigated. The results showed that higher Na+ ion concentrations led to decreased adsorption capacities and faster adsorption rates on SiO2 surfaces compared to amorphous carbon surfaces.
Article
Materials Science, Multidisciplinary
Yapeng Kong, Yu Xiao, Xuemin Liang, Yangyang Fan, Liqiang Wang, Sheng Yang, Jilin He, Yuran Chen
Summary: We have successfully synthesized nanoscale tantalum powder by electro-deoxidation of Ta2O5 cathode in molten Na3AlF6-K3AlF6-AlF3. The cathodic process involves solid-liquid reaction between Ta2O5 and the electrolyte, forming MxTaO2+xF1-x (M = Na, K) intermediates which are further reduced electrochemically to form tantalum particles. By designing a new porous structure in the Ta2O5 cathode, we achieved the formation of uniform-sized MxTaO2+xF1-x particles with a regular cubic morphology. This study demonstrates the controllable synthesis of nanoscale metal powders and opens up possibilities for developing materials with desired morphology and particle size.
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
(2023)
