Article
Mathematics, Interdisciplinary Applications
S. Geara, S. Martin, S. Adami, J. Allenou, B. Stepnik, O. Bonnefoy
Summary: This article presents a study on improving the control of liquid jet break-up by applying external vibrations using a simple numerical method. The method is based on a weakly compressible SPH approach and an improved geometrical method for density calculation near the free surface. The simulation results show accurate representation of the jet break-up phenomenon, indicating a step forward in simulating liquid atomization in industrial conditions with the SPH method.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Lijing Yang, Milad Rakhsha, Wei Hu, Dan Negrut
Summary: This contribution presents a multiphase flow solution method that combines incompressible smoothed particle hydrodynamics (SPH) discretization. It introduces a generalized particle shifting technique and a color-function-based repulsive force to improve interface smoothness and minimize artificial forces. The method utilizes consistent discretizations for gradient and Laplacian operators, enhancing accuracy. It has been successfully applied to various benchmark problems and implemented with GPU-enabled parallelism for complex 3D simulations.
JOURNAL OF COMPUTATIONAL PHYSICS
(2022)
Article
Physics, Fluids & Plasmas
Jon Martinez-Carrascal, J. Calderon-Sanchez, L. M. Gonzalez-Gutierrez, A. de Andrea Gonzalez
Summary: This article extends the classical Rayleigh-Taylor instability to situations where the fluid is completely confined, analyzing the effect of adding surface tension to the interface in a 2D viscous periodic case. The study compares the linear stability analysis obtained through Navier-Stokes equations and WCSPH method, showing remarkable agreement in simulations with different tank sizes and Atwood numbers.
Article
Computer Science, Interdisciplinary Applications
Joseph O'Connor, Jose M. Dominguez, Benedict D. Rogers, Steven J. Lind, Peter K. Stansby
Summary: This study addresses the high computational cost of Eulerian incompressible smoothed particle hydrodynamics (EISPH) by implementing it on multiple graphics processing units (GPUs). The implementation is validated against benchmark solutions and demonstrates second-order convergence. Detailed profiling and performance testing are conducted to investigate memory consumption and scaling characteristics.
COMPUTER PHYSICS COMMUNICATIONS
(2022)
Article
Engineering, Multidisciplinary
P. C. Harisankar, Tapas Sil
Summary: This study investigates the formation, properties, evaporation processes, and equilibration of a bare droplet of a liquid obeying the van der Waals equation of state (vEoS) using Smoothed particle hydrodynamics (SPH). The effect of an impenetrable wall boundary condition and the existing vapor on the droplet's properties are also studied. The results show that the evaporation process and equilibration follow similar curves to that of a bare drop with the same total number of particles.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Engineering, Mechanical
K. P. McNamara, B. N. Awad, M. J. Tait, J. S. Love
Summary: This study introduces a two-dimensional TLD model based on the SPH method, validated against hydrostatic and dam break flow scenarios, demonstrating its efficiency and accuracy. Experimental data shows that the SPH model has excellent predictive performance for TLDs with various parameters within the range studied.
JOURNAL OF FLUIDS AND STRUCTURES
(2021)
Article
Mathematics, Interdisciplinary Applications
Hideyo Negishi, Masahiro Kondo, Hiroaki Amakawa, Shingo Obara, Ryoichi Kurose
Summary: In recent years, particle methods have become an effective approach to understand and predict flows in complex geometry, such as lubrication behaviors in rolling bearings. This study adopted a physically consistent particle method, i.e., the moving particle hydrodynamics for incompressible flows (MPH-I) method. A surface tension model was included to capture the free surface flows in lubrication. The results showed that the MPH-I method with the two-potential-based surface tension model successfully reproduced fundamental pressure generation effects in fluid film lubrication.
COMPUTATIONAL PARTICLE MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Matthias Brugger, Roland Traxl, Roman Lackner
Summary: Numerical modeling of surface tension requires accurate interface description and efficient equation discretization. Smoothed particle hydrodynamics (SPH) is well-suited for modeling surface tension, but current formulations suffer from spurious currents near the interface, causing instability. A new discretization of the Continuum Surface Force (CSF) model is proposed in this work, conserving total energy and successfully suppressing spurious currents. Numerical tests show improved accuracy and convergence, indicating the stability of the new method.
JOURNAL OF COMPUTATIONAL PHYSICS
(2023)
Article
Mathematics, Applied
Fan Zhang, Can Huang, Huashan Zhang, Tiegang Liu, Moubin Liu
Summary: This paper extends the low-dissipation Riemann solver to the finite particle method, aiming to reduce spurious pressure oscillations and achieve higher accuracy.
COMPUTERS & MATHEMATICS WITH APPLICATIONS
(2022)
Article
Computer Science, Interdisciplinary Applications
B. X. Zheng, L. Sun, P. Yu
Summary: A novel interface method is developed for two-dimensional smoothed particle hydrodynamics (SPH) modelings of multiphase flows in order to address the interface detection and surface tension force implementation issues. The method utilizes an algebraic indicator for detecting interface particles and locally implements surface tension force, resulting in more accurate and efficient detection of interface particles and improved numerical efficiency. The method is evaluated through four numerical examples, demonstrating its accuracy, flexibility, and efficiency in detecting interface particles and recovering surface tension force.
JOURNAL OF COMPUTATIONAL PHYSICS
(2021)
Article
Engineering, Multidisciplinary
Ting Long, Houchao Huang
Summary: In this study, an improved high order smoothed particle hydrodynamics (SPH) method was developed to simulate the melting and solidification process in metal selective laser melting (SLM). The improved SPH method showed better stability and accuracy in modeling the SLM processes, as compared to traditional SPH. The introduction of improved kernel gradient correction and surface tension models further enhanced the effectiveness of the numerical simulations.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2023)
Article
Chemistry, Multidisciplinary
Fanfan Sun, Bingyue Song, Mingyi Tan
Summary: A new boundary treatment using additive boundary particles for incompressible smoothed particle hydrodynamics (ISPH) method is proposed, which simplifies the simulation of fluid-structure interaction problems and provides better predictions for pressure distribution.
APPLIED SCIENCES-BASEL
(2023)
Article
Engineering, Ocean
Kun Liu, Ye Liu, Shaowu Li, Hanbao Chen, Songgui Chen, Taro Arikawa, Yang Shi
Summary: This paper presents a coupling algorithm that combines Smoothed Particle Hydrodynamics (SPH) with the Finite Difference (FD) method to simulate incompressible free-surface flows over the near and far fields by solving the Navier-Stokes equations. The purpose of this hybrid approach is to reduce the computational load of SPH applications while maintaining high accuracy for both the near-field and far-field simulations. The algorithm achieves two-way coupling between FD and SPH models through interpolation in the overlapping region. It has been validated by various test cases and shows favorable accuracy, convergence, and applicability in simulating wave interactions with complex bathymetry and structures.
APPLIED OCEAN RESEARCH
(2023)
Article
Engineering, Multidisciplinary
W. K. Sun, L. W. Zhang, K. M. Liew
Summary: This study introduces a single-phase surface tension model based on fast free-surface detection, with efficient algorithms developed for free-surface detection. Compared to multiphase models, the single-phase model is simpler in algorithm, more computationally efficient, and maintains good accuracy and robustness.
APPLIED MATHEMATICAL MODELLING
(2021)
Article
Engineering, Multidisciplinary
G. Y. Li, X. J. Ma, B. W. Zhang, H. W. Xu
Summary: An integrated SPH method is developed by improved techniques for droplets impacting on the wall with heat transfer. The method is validated by simulations and shows good agreement with experimental results. Wall characteristics significantly influence droplet deformation and spreading behavior on the hydrophilic wall.
ENGINEERING ANALYSIS WITH BOUNDARY ELEMENTS
(2021)
Article
Astronomy & Astrophysics
Yan Peng, Xiaoyang Xu, Guohua Liu
MODERN PHYSICS LETTERS A
(2015)
Article
Engineering, Multidisciplinary
Xiaoyang Xu
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
(2016)
Article
Computer Science, Interdisciplinary Applications
Xiaoyang Xu, Xiao-Long Deng
COMPUTER PHYSICS COMMUNICATIONS
(2016)
Article
Mechanics
Xiaoyang Xu, Peng Yu
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2016)
Article
Mechanics
X. Y. Xu
JOURNAL OF APPLIED MECHANICS AND TECHNICAL PHYSICS
(2017)
Article
Engineering, Chemical
Qingsheng Liu, Jie Ouyang, Wen Zhou, Xiaoyang Xu, Lin Zhang
POLYMER ENGINEERING AND SCIENCE
(2015)
Article
Engineering, Multidisciplinary
Xiaoyang Xu, Peng Yu
APPLIED MATHEMATICAL MODELLING
(2019)
Article
Computer Science, Interdisciplinary Applications
Xiaoyang Xu, Tingting Tang, Peng Yu
INTERNATIONAL JOURNAL FOR NUMERICAL METHODS IN FLUIDS
(2020)
Article
Engineering, Multidisciplinary
Xiaoyang Xu, Mohar Dey, Mingfeng Qiu, James J. Feng
APPLIED MATHEMATICAL MODELLING
(2020)
Article
Mechanics
Sai Peng, Yong-Liang Xiong, Xiao-Yang Xu, Peng Yu
Article
Mechanics
Sai Peng, Jia-yu Li, Yong-liang Xiong, Xiao-yang Xu, Peng Yu
Summary: This study numerically investigates vortex shedding of two-dimensional viscoelastic flow over a circular cylinder at a Reynolds number of 100. The combined effects of shear-thinning and elasticity on flow characteristics and macro parameters such as time-averaged drag coefficient, root mean square of lift coefficient, and Strouhal number are systematically discussed. The results indicate that shear-thinning triggers inertial instability, while elasticity introduces extensional viscosity to suppress flow instability. The simulation also shows that strong elasticity may trigger an elastic instability characterized by high flow fluctuation at the leading edge of the cylinder.
JOURNAL OF NON-NEWTONIAN FLUID MECHANICS
(2021)
Article
Engineering, Marine
Xiaoyang Xu, Yao-Lin Jiang, Peng Yu
Summary: In this study, 3D dam-break flows against various forms of obstacles were numerically simulated using the SPH method. The accuracy and effectiveness of the method were validated by comparing the results with experiments and other numerical methods.
Article
Engineering, Multidisciplinary
Xiaoyang Xu, Lingyun Tian, Sai Peng, Peng Yu
Summary: In this work, a smoothed particle hydrodynamics (SPH) method is developed to simulate non-isothermal viscoelastic free surface flows in injection molding processes. The validity of the SPH method is verified by solving isothermal/non-isothermal Poiseuille flows, and the method is extended to 2D non-isothermal viscoelastic injection molding processes. The effects of various parameters on the temperature and flow-induced stresses are analyzed, and results for a 3D non-isothermal viscoelastic injection molding process are presented.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Engineering, Multidisciplinary
Xiaoyang Xu, Peng Yu
APPLIED MATHEMATICAL MODELLING
(2017)
