Article
Engineering, Marine
Dhaval T. Solanki, Dharmendra S. Sharma
Summary: The analytical solution for uniform potential flow around two similar or dissimilar polygonal cylinders is obtained using a complex potential function and conformal mapping method. Mathematical formulas for velocity, pressure and hydrodynamic force distribution are derived, and the effects of various parameters on the hydrodynamic interaction between the cylinders are investigated. The numerical results obtained from the present method are compared with those from commercial CFD software package and literature.
Article
Mathematics
Antonio Lamura
Summary: This study investigates the dynamics and rheology of a vesicle confined in a channel under shear flow at finite temperature. A two-dimensional numerical model is used to analyze the effect of temperature on vesicle motion and system viscosity. It is found that the suspension viscosity is influenced by the viscosity contrast and different temperature-dependent mechanisms.
Article
Chemistry, Physical
Arghyadeep Paul, N. R. Aluru
Summary: The study investigates the impact of nonlocal shear stress on gravity-driven isothermal flow in nanochannels under strong confinement. The local average density model is used and the fluid's viscosity kernel is estimated using the sinusoidal transverse force method. A continuum model is proposed to solve the nonlocal hydrodynamics problem and its solutions are qualitatively compared with the results of non-equilibrium molecular dynamics simulations.
JOURNAL OF CHEMICAL PHYSICS
(2022)
Article
Mechanics
Shaofeng Li, Chengcheng Yu, Suhui Qian, Jinbao Song, Anzhou Cao
Summary: The influence of linear shear flow on both surface and internal freak waves was studied using a two-layer model and a nonlinear Schrodinger equation, the regions where interfacial freak waves occur were identified via analysis of modulational instability, and the effects of positive and negative vorticity on the steepness and height of the waves during supercritical up-flow and down-flow were explored.
Article
Mathematics
Xin Liu
Summary: In this work, a commonly used simplified two-fluids flow model is justified as the asymptotic limit by considering an isentropic fluid-fluid interaction model with a large symmetric drag force. Equations for each fluid component with an interaction term are identified in addition to the simplified two-fluids flow model, which can be used to resolve the density of one fluid specie based on information on the density and the velocity of the other fluid specie, i.e., the testing flow.
JOURNAL OF DIFFERENTIAL EQUATIONS
(2023)
Article
Mechanics
B. Li, B. Lyu
Summary: An analytical model is developed to study the sound produced by the interaction between shock and instability waves in two-dimensional supersonic jet flows. The model accurately predicts the frequencies of the fundamental screech tone and its harmonics, as well as the sound directivity. The noise emission is found to be strongest in the upstream direction and rapidly decays as the observer angle approaches 180°, which is in accordance with experimental results.
JOURNAL OF FLUID MECHANICS
(2023)
Article
Engineering, Marine
Shaolin Yang, Zhiqiang Tan, Wanli Yang, Hasan Imani, Danqing Song, Jun Luo, Jiarui Zhang
Summary: This paper focuses on the hydrodynamic interaction between dam-break waves and circular pier. Experimental studies were conducted to observe the evolution of wave front profiles and analyze the pressures and forces on the circular pier. The research provides valuable reference for improving calculation methods.
Article
Chemistry, Physical
Hiroyuki Ohshima
Summary: Asymptotic expressions for electrostatic interaction energy between two weakly charged spheroidal particles in an electrolyte solution were derived based on linear superposition approximation. The interaction was found to be screened Coulomb interaction between hypothetical point particles with orientation-dependent charges, and explicit interaction energy equations were given for four configurations of similar spheroids. Comparison was also made with results from Derjaguin's approximation.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2021)
Article
Energy & Fuels
Jeong-Seok Kim, Kyong-Hwan Kim, Jiyong Park, Sewan Park, Seung Ho Shin
Summary: The study investigated the applicability of the linear decomposition method for hydrodynamic energy conversion of an oscillating-water-column type wave energy converter. The validity of the method was examined by comparing it with the direct interaction method, showing good agreement in estimating hydrodynamic energy conversion performance.
Article
Engineering, Marine
Donglei Zhang, Kai Dong, Xianzhou Wang, Dakui Feng
Summary: This study numerically investigated the hydrodynamic interaction to the submarine during the overtaking process by surface ships. The results showed that the vertical distance between the tanker and submarine had a significant influence on the submarine, and the forward speed of both the tanker and submarine affected the vertical force and pitching moment of the submarine.
Article
Engineering, Marine
Samyar Sarraf, Madjid Abbaspour, Kiarash M. Dolatshahi, Sadyar Sarraf, Mahdi Sani
Summary: This article examines the interaction between a squat submarine and a ship in various wave and resistance tests. A series of experiments were conducted using a captive model of the submarine at a scale of 1/10 and a Fridsma ship model. The results show that the drag forces on the submarine increase by up to 41% in the critical zone behind the ship, extending to a depth of 0.75 times the submarine's depth.
Article
Engineering, Multidisciplinary
Chen Xu, Chuang Fan, Zhiping Zhang, Yijun Mao
Summary: This study develops a method to investigate the effects of wake and potential interactions on the flow velocity characteristics of a two-stage centrifugal refrigeration compressor, by studying the detailed features of flow velocity downstream each cascade of blades/vanes to understand their impact on flow evolution.
ENGINEERING APPLICATIONS OF COMPUTATIONAL FLUID MECHANICS
(2021)
Article
Engineering, Marine
L. Guo, K. Qu, J. X. Huang, X. H. Li
Summary: This study investigates the impacts of offshore wind on the hydrodynamics of solitary waves on fringing reefs. The research results show that offshore wind can significantly increase the maximum wave runup height and decrease the wave reflection coefficient.
JOURNAL OF MARINE SCIENCE AND ENGINEERING
(2022)
Article
Chemistry, Multidisciplinary
Jin Huang, Wenjian Chen, Ruizhi Shu, Jing Wei
Summary: This study analyzed the viscoplastic flow of magnetorheological fluid in a disc using the Navier-Stokes Momentum Equation. The magnetorheological properties of the fluid were described using the Herschel-Bulkley model. The relationship between torque, magnetic field, material, size, and motion was established, and the magnetic field and working gap were optimized and analyzed.
APPLIED SCIENCES-BASEL
(2022)
Article
Engineering, Chemical
Dongchi Yu, Fei Hu
Summary: Studies on flow-induced particle resuspension have significant engineering applications, and the potential impact of flow slip on solid surfaces is often overlooked in existing research, particularly in vacuum systems and space applications.
JOURNAL OF AEROSOL SCIENCE
(2021)