scholarly journals A Study of Axial Impact of Composite Rods Using SPH Approach

2001 ◽  
Vol 8 (5) ◽  
pp. 303-312 ◽  
Author(s):  
K.Y. Lam ◽  
Y.G. Shen ◽  
S.W. Gong
Keyword(s):  
Theoretical Analysis ◽  
Material Properties ◽  
Computational Simulation ◽  
Present Approach ◽  
Impact Response ◽  
Sph Method ◽  
Axial Impact ◽  
Composite Rod ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamic

A computational simulation of axial impact between composite rods is presented in this paper. The smoothed particle hydrodynamic (SPH) method is coded and implemented for this study, in which the property and strength for different materials are included. The SPH formulation for impact between rods as well as its computatinal procedure is also expounded. The present approach is used to study impact between composites rods parametrically. The effects of material properties and configurations of composite rod on impact response are then examined in detail. In addition, the present SPH results are compared with those from theoretical analysis.

Numerical Simulation of Wave Breaking Over a Submerged Step with SPH Method

2018 ◽  
Vol 01 (02) ◽  
pp. 1840005 ◽  
Author(s):  
Hongjie Wen ◽  
Bing Ren ◽  
Guoyu Wang ◽  
Yumeng Zhao
Keyword(s):  
Wave Breaking ◽  
Sph Method ◽  
Vertical Distributions ◽  
Sph Model ◽  
Smoothed Particle ◽  
Mean Water Level ◽  
The Mean ◽  
Wave Maker ◽  
Wave Induced ◽  
Smoothed Particle Hydrodynamic

Wave breaking over a submerged step with a steep front slope and a wide horizontal platform is studied by smoothed particle hydrodynamic (SPH) method. By adding a momentum source term and a velocity attenuation term into the governing equation, a nonreflective wave maker system is introduced in the numerical model. A suitable circuit channel is specifically designed for the present SPH model to avoid the nonphysical rise of the mean water level on the horizontal platform of the submerged step. The predicted free surface elevations and the spatial distributions of wave height and wave setup over the submerged step are validated using the corresponding experimental data. In addition, the vertical distributions of wave-induced current over the submerged step are also investigated at both low and high tides.

GPU-BASED FLUID SIMULATION WITH FAST COLLISION DETECTION ON BOUNDARIES

2012 ◽  
Vol 03 (01) ◽  
pp. 1240003 ◽  
Author(s):  
JIAWEN WU ◽  
FENGQUAN ZHANG ◽  
XUKUN SHEN
Keyword(s):  
Collision Detection ◽  
Fluid Simulation ◽  
Sph Method ◽  
Neighbor Search ◽  
Fine Detail ◽  
Simulation Based ◽  
Smoothed Particle ◽  
Sph Simulation ◽  
Smoothed Particle Hydrodynamic ◽  
Fast Collision

In this paper, we present a method for fluid simulation based on smoothed particle hydrodynamic (SPH) with fast collision detection on boundaries on GPU. The major goal of our algorithm is to get a fast SPH simulation and rendering on GPU. Additionally, our algorithm has the following three features: At first, to make the SPH method GPU-friendly, we introduce a spatial hash method for neighbor search. After sorting the particles based on their grid index, neighbor search can be done quickly on GPU. Second, we propose a fast particle-boundary collision detection method. By precomputing the distance field of scene boundaries, collision detection's computing cost arrived as O(n), which is much faster than the traditional way. Third, we propose a pipeline with fine-detail surface reconstruction, and progressive photon mapping working on GPU. We experiment our algorithm on different situations and particle numbers of scenes, and find out that our method gets good results. Our experimental data shows that we can simulate 100K particles, and up to 1000K particles scene at a rate of approximately 2 times per second.

SPH Method for Simulation of Wind-Blown Sand Movements

2011 ◽  
Vol 462-463 ◽  
pp. 1019-1025
Author(s):  
A Fang Jin ◽  
Zhi Chun Yang ◽  
Mamtimin Gheni ◽  
Wen Tao Chen
Keyword(s):  
Mass Density ◽  
Computational Simulation ◽  
Sph Method ◽  
Two Phase ◽  
Self Organized ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Sand Movement ◽  
Observation Method ◽  
Physical Quantities

Wind-Blown sand movement is a complicated, non-linear, self-organized and two-phase flow. Conventional theory of mechanics and existing experimental observation method can’t describe that inherent mechanism exactly, and then appeared much difficulty of numerical method for computational simulation of wind-blown sand movement. In this paper, the smoothed particle hydrodynamics (SPH) method is used for simulating the wind-blown sand movement process. According to the characteristic of wind-blown sand movement the sand grains phase and the gas phase are modeled by considering the different kernel function and the particles size, mass, density, velocity and other physical quantities, which can movement along with controlling equation. Finally the numerical simulations are conducted for wind-blown sand movement and some reasonable results are obtained.

Numerical Simulation of Impact Crush/Buckling of Circular Tube Using SPH Method

2006 ◽  
Vol 306-308 ◽  
pp. 697-702 ◽  
Author(s):  
Masanori Kikuchi ◽  
Masayuki Miyamoto
Keyword(s):  
Numerical Simulation ◽  
Smoothed Particle Hydrodynamics ◽  
Circular Tube ◽  
Impact Load ◽  
Sph Method ◽  
Axial Impact ◽  
Buckling Modes ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method

SPH (Smoothed Particle Hydrodynamics) method is applied to impact crush/buckling problem of circular tube. It has been known that there are several kinds of buckling modes by axial impact load. First, elastic analyses of the crush/buckling are conducted, and three types of typical crush/buckling shape are obtained. Following the elastic analyses, elastic-plastic analyses were performed to improve the accuracy of the simulation. The shape of the buckling and the energy absorbed by circular tube are discussed.

scholarly journals A practical approach for extracting mechanical properties of microcapsules using a hybrid numerical model

2020 ◽  
Vol 25 (1) ◽  
Author(s):  
A. Rahmat ◽  
J. Meng ◽  
D. R. Emerson ◽  
Chuan-Yu Wu ◽  
M. Barigou ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Passage Time ◽  
Spring Model ◽  
Sph Method ◽  
Deformation Index ◽  
Quantitative Parameters ◽  
Mass Spring Model ◽  
Smoothed Particle ◽  
Mass Spring ◽  
Smoothed Particle Hydrodynamic

AbstractIn this paper, the deformation of compliant microcapsules is studied in narrow constrictions using a hybrid particle-based model. The model combines the Smoothed Particle Hydrodynamic (SPH) method for modelling fluid flow and the Mass Spring Model (MSM) for simulating deformable membranes. The model is initially validated for the dynamics of microcapsules in shear flow. Then, several quantitative parameters such as the deformation index, frontal tip and rear tail curvatures and the passage time are introduced and their variations are studied with respect to capillary number and constriction size. Subsequently, a dependency analysis is performed on these quantitative parameters and some recommendations are made on fabrication of microfluidic devices and analysis of microcapsules for extracting their mechanical properties. It is revealed that the deformation index and frontal tip and rear tail curvatures are the most suitable parameters for correlating the elastic properties to the dynamics of microcapsules.

scholarly journals A Novel Improved Coupled Dynamic Solid Boundary Treatment for 2D Fluid Sloshing Simulation

2021 ◽  
Vol 9 (12) ◽  
pp. 1395
Author(s):  
Kaidong Tao ◽  
Xueqian Zhou ◽  
Huiolong Ren
Keyword(s):  
Numerical Dissipation ◽  
Solid Boundary ◽  
Sph Method ◽  
Fluid Sloshing ◽  
Commercial Code ◽  
Boundary Treatment ◽  
Smoothed Particle ◽  
Sph Simulation ◽  
Smoothed Particle Hydrodynamic ◽  
Good Agreement

In order to achieve stable and accurate sloshing simulations with complex geometries using Smoothed Particle Hydrodynamic (SPH) method, a novel improved coupled dynamic solid boundary treatment (SBT) is proposed in this study. Comparing with the previous SBT algorithms, the new SBT algorithm not only can reduce numerical dissipation, but also can greatly improve the ability to prevent fluid particles penetration and to expand the application to model unidirectional deformable boundary. Besides the new SBT algorithm, a number of modified algorithms for correcting density field and position shifting are applied to the new SPH scheme for improving numerical stability and minimizing numerical dissipation in sloshing simulations. Numerical results for three sloshing cases in tanks with different geometries are investigated in this study. In the analysis of the wave elevation and the pressure on the tank, the SPH simulation with the new SBT algorithm shows a good agreement with the experiment and the simulations using the commercial code STAR-CCM+. Especially, the sloshing case in the tank with deformable bottom demonstrates the robustness of the new boundary method.

scholarly journals An implementation of smoothed particle hydrodynamic methods for fluids problems

2010 ◽  
Vol 32 (1) ◽  
pp. 37-46
Author(s):  
Nguyen Hoai Son ◽  
Nguyen Duy Hung
Keyword(s):  
Stokes Equations ◽  
Mass Conservation ◽  
Navier Stokes ◽  
Benchmark Problems ◽  
Sph Method ◽  
Navier Stokes Equations ◽  
Driven Cavity ◽  
Weakly Compressible ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamic

In this article, we present a numerical method that is Smoothed Particle Hydrodynamic (SPH) method. In the SPH method for the Navier - Stokes equations the most widespread method to solve for pressure and mass conservation is the weakly compressible assumption (WCSPH). This article presents two important benchmark problems to validate the algorithm of SPH method. The two benchmark problems chosen are the Lid - driven cavity problem and Poiseuille flow problem at very low Reynolds numbers. The SPH results are also in good agreement with the analytical solution.

Pricing European and American Options by SPH Method

2019 ◽  
Vol 17 (08) ◽  
pp. 1950043
Author(s):  
B. Achchab ◽  
A. Cheikh Maloum ◽  
A. Qadi El Idrissi
Keyword(s):  
Differential Equation ◽  
American Options ◽  
Time Variable ◽  
Sph Method ◽  
Numerical Tests ◽  
Black Scholes Model ◽  
Black Scholes ◽  
Smoothed Particle ◽  
The Finite Difference Method ◽  
Smoothed Particle Hydrodynamic

In this paper, the meshless smoothed particle hydrodynamic (SPH) method is applied for solving the Black–Scholes model for European and American options, which are governed by a generalized Black–Scholes partial differential equation. We use the [Formula: see text]-method and SPH for discretizing the governing equation in time variable and option pricing, respectively. To validate our SPH method, we compare it with the analytical solution and also the finite difference method. The numerical tests demonstrate the accuracy and robustness of our method.

Numerical Simulations for Hail Impact on Lightweight Sandwich Structures

2011 ◽  
Vol 410 ◽  
pp. 321-324
Author(s):  
B. Han ◽  
Feng Xian Xin ◽  
Feng Jin ◽  
T.J. Lu
Keyword(s):  
Metal Foam ◽  
Sandwich Structures ◽  
Failure Behavior ◽  
Sph Method ◽  
Fem Model ◽  
Aircraft Structures ◽  
Smoothed Particle ◽  
Lattice Core ◽  
Smoothed Particle Hydrodynamic ◽  
Hail Impact

Hail impact has been a long lasting threat for aircraft structures such as leading edges and forward sections. To mimic the physical process of hail impact on aircraft structures, a FEM model is established for all-metal sandwich structures having four different kinds of cores: corrugated core, pyramidal lattice core, metal foam core, and corrugation-foam hybrid core. Smoothed particle hydrodynamic (SPH) method is employed to predict the failure behavior of the hail, whilst the sandwich structures are described by a Lagrangian reference configuration. It is demonstrated that the sandwich structures with hybrid core outperforms the other three types for withstanding hail penetration as well as absorbing impact energy.

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