Article
Mechanics
Somnath Santra, Suman Chakraborty
Summary: The study demonstrates that controlling the axial oscillations can regulate the rate of transverse migration of droplets, and under the influence of an electric field, it is possible to achieve an increase in migration rate and reversal of lateral migration direction.
JOURNAL OF FLUID MECHANICS
(2021)
Article
Biochemical Research Methods
Yue Yang, Weitao Bai, Jun Dong, Huimin Lv, Yonggang Zhu
Summary: In this study, a rhythmically expanding alveolar chip with multiple alveoli was designed using microfluidic technique. The microflow patterns inside each alveolus were studied using a micro-PIV measurement system. The results showed that the interactions between multiple alveoli can lead to new phenomena and differences in flow patterns.
Article
Mechanics
D. Henry, B. Vincent, S. Miralles, V. Botton, H. Ben Hadid
Summary: This paper presents a detailed analysis of the flows induced in a long two-dimensional cavity heated from below in the presence of streaming due to ultrasound acoustic waves emitted by a source. The study reveals that the streaming flow influences the instability thresholds and induces various flow transitions.
JOURNAL OF FLUID MECHANICS
(2022)
Article
Engineering, Marine
Andi Xu, Yuyang Chai, Fengming Li, Yongxin Chen
Summary: An effective nonlinear dynamic model is developed to investigate vortex-induced vibration (VIV) characteristics of a slightly curved pipe conveying fluid in steady and oscillatory flows. The model takes into account the initial displacement caused by geometric imperfections. The study examines the vibration features in oscillatory flows, validates the accuracy of the model using experimental results, and discusses the influences of different parameters on the VIV responses.
Article
Physics, Multidisciplinary
Mohamed M. Mandour, Sergey A. Astashkevich, Anatoly A. Kudryavtsev
Summary: This paper reports the presence of electron vortexes in two-dimensional photoplasma and investigates their dependence on the buffer gas pressure through a fluid model experiment.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Chemistry, Physical
Zhang Xie, Zheng Li, Jingyuan Li, Jianlong Kou, Jun Yao, Jintu Fan
Summary: By conducting all-atom molecular dynamics simulations, it was discovered that the distribution and behavior of gas molecules in aqueous solutions can be regulated by the direction of external electric fields, which alters hydrogen bonds between water molecules at the solid-water interface. This finding reveals a new mechanism for controlling gas dissolution and accumulation in aqueous solutions, with potential applications in drug synthesis, microfluidic device design, and natural gas extraction.
JOURNAL OF CHEMICAL PHYSICS
(2021)
Article
Geosciences, Multidisciplinary
Shaohua Wang, Zhiguo He, Hengye Gu, Yuezhang Xia
Summary: The rheological properties of natural mud, including the two-step yielding process and the connection between storage modulus and yield stresses, were investigated in this study. The findings provide important insights for understanding the behavior of natural mud and have implications for various applications such as sediment transport and protecting seafloor infrastructure.
FRONTIERS IN EARTH SCIENCE
(2022)
Article
Physics, Multidisciplinary
Chenmu Zhang, Ruoyu Wang, Himani Mishra, Yuanyue Liu
Summary: Researchers have discovered new 2D semiconductors with significantly higher carrier mobility than current ones, even surpassing bulk silicon, through computational screening and accurate calculation using a novel first-principles method. The exceptional mobilities can be explained by several physical features, including a new feature called carrier-lattice distance, which correlates well with mobility and is easy to calculate.
PHYSICAL REVIEW LETTERS
(2023)
Article
Engineering, Marine
Weiguang Yao, Hui Zhang, Daiwen Jiang, Mingyue Gui, Zijie Zhao, Zhihua Chen
Summary: The transformation mechanisms of vortex structures on vortex-induced vibration (VIV) of an elastically mounted sphere by Lorentz force are investigated. The relationships among the sphere trajectories, wake structures, vorticity distribution, and the rotation characteristics of the rear stagnation point (RSP) and separation line (SL) are discussed before and after the application of Lorentz force. The results reveal the transformation from hairpin vortices to spiral vortices, and then to the double-thread wake, as well as the effects of the interaction parameter N of the Lorentz force on the wake structures and vibration characteristics.
Article
Mechanics
D. Gligor, P. Salgado Sanchez, J. Porter, I. Tinao
Summary: This study presents a numerical analysis of the thermocapillary-driven dynamics of a free surface in microgravity, as well as its response to steady or oscillatory thermal excitation. The results show that under this excitation, the free surface undergoes asymmetrical changes and oscillations, and thermal modulation can excite sloshing modes in low-viscosity liquids. The study also investigates the response of the free surface to oscillatory thermal excitation with different parameters and identifies a resonance peak.
Article
Neurosciences
Cammille C. Go, Huseyin O. Taskin, Seyed-Ahmad Ahmadi, Giulia Frazzetta, Laura Cutler, Saguna Malhotra, Jessica I. W. Morgan, Virginia L. Flanagin, Geoffrey K. Aguirre
Summary: This study aims to characterize the form and magnitude of nystagmus induced at 3T magnetic field. Eye movements of 42 subjects were measured, and persistent nystagmus was observed in subjects in a 3T magnetic field, with the amplitude of nystagmus correlated with the roll angle of the vestibular system.
Article
Engineering, Environmental
Dongyu Xu, Geng Li, Yilin Dong, Qiuwen Wang, Jie Zhang, Guangming Zhang, Longyi Lv, Yuguo Xia, Zhijun Ren, Pengfei Wang
Summary: Photocatalytic oxygen activation is an effective method for controlling algae in water, but the recombination of photogenerated charge and slow oxygen transfer rates limit its efficiency. In this study, a magnetic field was introduced to the BiO2-x/Bi3NbO7 system to convert oxygen into reactive radicals. Experimental and computational results showed that the Lorentz force generated by the magnetic field accelerated charge separation and increased electron concentration. Additionally, the gas-liquid mass transfer coefficient increased by 59.79% with the magnetic field, leading to more oxygen reduction to superoxide radicals. The photocatalytic algae inactivation rate by BiO2-x/Bi3NbO7 with a magnetic field was 2.07 times higher than without. This work extends the use of magnetic fields to enhance both charge separation and oxygen transfer rates.
JOURNAL OF HAZARDOUS MATERIALS
(2023)
Article
Thermodynamics
Amal Louanate, Rabie El Otmani, Khalid Kandoussi, M. Hamed Boutaous
Summary: Research on solid-liquid phase change materials indicates that natural convection must be considered in numerical models to accurately describe the phase change process, especially during melting. The viscosity of PCMs affects natural convection, so the rheological behavior of PCMs should be properly evaluated.
THERMOCHIMICA ACTA
(2021)
Article
Thermodynamics
Yuqi Huang, Haipeng Chen, Yidong Fang
Summary: Studying the influence of oscillation parameters on heat transfer in Faraday waves is important for evaluating the dynamic behavior and safety of thermal management systems in automobiles, ships, and aircraft.
CASE STUDIES IN THERMAL ENGINEERING
(2023)
Article
Engineering, Ocean
Mengmeng Zhang, Shixiao Fu, Haojie Ren, Yuwang Xu, Xu Qin
Summary: In this paper, the vortex-induced force characteristics of a flexible pipe under oscillatory flow were experimentally investigated. The results showed that the VIV excitation coefficient has a significant acceleration and deceleration effect, and this effect can be represented by the dimensionless acceleration parameter gamma of the flow field. Additionally, the added mass coefficients presented different time-varying features under oscillatory flow with different maximum reduced velocity.
APPLIED OCEAN RESEARCH
(2022)
Article
Biochemical Research Methods
Joydip Chaudhuri, Seim Timung, Chola Bhargava Dandamudi, Tapas Kumar Mandal, Dipankar Bandyopadhyay
Article
Biochemical Research Methods
Seim Timung, Joydip Chaudhuri, Manash Pratim Borthakur, Tapas Kumar Mandal, Gautam Biswas, Dipankar Bandyopadhyay
Article
Chemistry, Multidisciplinary
Mitradip Bhattacharjee, Viswanath Pasumarthi, Joydip Chaudhuri, Amit Kumar Singh, Harshal Nemade, Dipankar Bandyopadhyay
Article
Biochemical Research Methods
Surjendu Maity, Joydip Chaudhuri, Shirsendu Mitra, Saptak Rarotra, Dipankar Bandyopadhyay
Article
Mechanics
Joydip Chaudhuri, Tapas Kumar Mandal, Dipankar Bandyopadhyay
Article
Biophysics
Mitradip Bhattacharjee, Sagnik Middya, Pablo Escobedo, Joydip Chaudhuri, Dipankar Bandyopadhyay, Ravinder Dahiya
BIOSENSORS & BIOELECTRONICS
(2020)
Article
Chemistry, Physical
Sunny Kumar, Abir Ghosh, Joydip Chaudhuri, Seim Timung, Ashok Kumar Dasmahapatra, Dipankar Bandyopadhyay
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2020)
Article
Chemistry, Physical
Joydip Chaudhuri, Dipankar Bandyopadhyay
Summary: The study suggests that coupling the continuum approach with a statistical one can help develop a generic thermodynamic model for analyzing variations of interfacial tension and deformations between fluid interfaces. Numerical experiments show that the effects of field exposure on molecule redistribution and molecular interaction potentials can be correlated to local variations of interfacial tension and deformations. The simulated results accurately predict experimental and theoretical results on interfacial deformation under different fields.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Mechanics
Joydip Chaudhuri, Tapas Kumar Mandal, Dipankar Bandyopadhyay
Summary: This study investigates the impact of an oil droplet on an air-water interface at low to moderate velocities using computational fluid dynamics simulations. The results reveal different flow morphologies, such as entrapped oil droplets or air bubbles in water, oil lens, oil toroids, and compound droplets, depending on the impact velocity. The interfacial tension, density, and viscosity differences across the interface play key roles in determining the flow morphologies. The findings provide insights into the physics of ternary phase drop impacts and have implications for the development of microfluidic devices and emulsion production.
Article
Chemistry, Multidisciplinary
Satarupa Dutta, Joydip Chaudhuri, Partho Sarathi Gooh Pattader, Dipankar Bandyopadhyay
Summary: Experimental investigations and simulations reveal that under an electric field, two unequal sized oppositely charged droplets can come in contact in an asymmetric manner. The droplets undergo asymmetric deformations during noncoalescence and a third configuration occurs at close proximity. The study also confirms the bifurcation of the Taylor cone on the smaller droplet into liquid tentilla bridges prior to contact with the bigger droplet, with the scales matching the predictions from nonlinear bifurcation theory.
Article
Chemistry, Multidisciplinary
Joydip Chaudhuri, Tapas Kumar Mandal, Dipankar Bandyopadhyay
Summary: Computational fluid dynamics simulations were used to investigate the impact of an oil droplet on a water surface. The study shows the detailed evolution of the ternary system consisting of air-water, oil-water, and oil-air interfaces when the oil droplet impacts the water surface at a high velocity. The analysis reveals interesting flow morphologies, such as the flattening, spreading, stretching, and dewetting of the oil droplet on the water surface. The simulations also uncover the formation of an oil-water crown, followed by the ejection of secondary water droplets and the subsequent formation of an array of secondary oil droplets during the dewetting process.
Article
Chemistry, Physical
Joydip Chaudhuri, Tapas Kumar Mandal, Dipankar Bandyopadhyay
Summary: This study explores the effects of the pre-impact shape of an oil droplet on the dynamics after it impacts an air-water interface. The research reveals that the initial shape of the droplet changes the post-impact flow structures, leading to different flow patterns. The analysis of the crater depth shows distinct three stage dynamics.
Article
Physics, Fluids & Plasmas
Joydip Chaudhuri
Summary: This study investigates the effect of radiative heat transfer on entropy generation in two-phase nonisothermal fluid flow. It is found that applying a transverse magnetic field reduces fluid throughput and temperature distribution. Additionally, adjustments to magnetic field intensity, temperature differences, and fluid properties can alter temperature and fluid flow profiles in a noninvasive way.
Article
Mechanics
Kartick Mondal, Abir Ghosh, Joydip Chaudhuri, Dipankar Bandyopadhyay
JOURNAL OF FLUID MECHANICS
(2018)
