scholarly journals A Novel Post Process Method For Smoothed Particle Hydrodynamics by Interpolation on Specified Slice Plane

2021 ◽  
Vol 2113 (1) ◽  
pp. 012013
Author(s):  
Yanli Li ◽  
Junhang Guo
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Meshless Method ◽  
Field Variable ◽  
Processing Method ◽  
Post Process ◽  
Lagrangian Modeling ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Simulation Results ◽  
Process Method

Abstract The smoothed particle hydrodynamics (SPH) is widely used in numerical simulations as a kind of meshless method. The particles are used to represent object, which is a fully Lagrangian modeling scheme without the need to define a spatial mesh so it can simulate large deformation. The classic post process method cannot visualize the simulation results smoothly, so a novel post processing method is proposed in this paper. By developing a program, the coordinates and field variables of particles were collected to a file. Using the kernel function, the field variable on a specified slice plane was interpolated. By developing a program, the simulation results have been rendered smoothly. This method is illustrated by a penetration example in this paper.

scholarly journals Modeling and Simulation Techniques Used in High Strain Rate Projectile Impact

Mathematics ◽  
2021 ◽  
Vol 9 (3) ◽  
pp. 274
Author(s):  
Derek G. Spear ◽  
Anthony N. Palazotto ◽  
Ryan A. Kemnitz
Keyword(s):  
High Strain Rate ◽  
Strain Rate ◽  
Smoothed Particle Hydrodynamics ◽  
High Strain ◽  
Lagrangian Analysis ◽  
Computational Performance ◽  
Lagrangian Modeling ◽  
Analysis Technique ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

A series of computational models and simulations were conducted for determining the dynamic responses of a solid metal projectile impacting a target under a prescribed high strain rate loading scenario in three-dimensional space. The focus of this study was placed on two different modeling techniques within finite element analysis available in the Abaqus software suite. The first analysis technique relied heavily on more traditional Lagrangian analysis methods utilizing a fixed mesh, while still taking advantage of the finite difference integration present under the explicit analysis approach. A symmetry reduced model using the Lagrangian coordinate system was also developed for comparison in physical and computational performance. The second analysis technique relied on a mixed model that still made use of some Lagrangian modeling, but included smoothed particle hydrodynamics techniques as well, which are mesh free. The inclusion of the smoothed particle hydrodynamics was intended to address some of the known issues in Lagrangian analysis under high displacement and deformation. A comparison of the models was first performed against experimental results as a validation of the models, then the models were compared against each other based on closeness to experimentation and computational performance.

scholarly journals Progress in the Smoothed Particle Hydrodynamics Method to Simulate and Post-process Numerical Simulations of Annular Airblast Atomizers

2020 ◽  
Vol 105 (4) ◽  
pp. 1119-1147
Author(s):  
G. Chaussonnet ◽  
T. Dauch ◽  
M. Keller ◽  
M. Okraschevski ◽  
C. Ates ◽  
...  
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Flux Ratio ◽  
Liquid Sheet ◽  
Sph Method ◽  
Post Process ◽  
Finite Time Lyapunov Exponent ◽  
Fragmentation Spectrum ◽  
Particle Hydrodynamics ◽  
Primary Breakup ◽  
Smoothed Particle

AbstractThis paper illustrates recent progresses in the development of the smoothed particle hydrodynamics (SPH) method to simulate and post-process liquid spray generation. The simulation of a generic annular airblast atomizer is presented, in which a liquid sheet is fragmented by two concentric counter swirling air streams. The accent is put on how the SPH method can bridge the gap between the CAD geometry of a nozzle and its characterization, in terms of spray characteristics and dynamics. In addition, the Lagrangian nature of the SPH method allows to extract additional data to give further insight in the spraying process. First, the sequential breakup events can be tracked from one large liquid blob to very fine stable droplets. This is herein called the tree of fragmentation. From this tree of fragmentation, abstract quantities can be drawn such as the breakup activity and the fragmentation spectrum. Second, the Lagrangian coherent structures in the turbulent flow can be determined easily with the finite-time Lyapunov exponent (FTLE). The extraction of the FTLE is particularly feasible in the SPH framework. Finally, it is pointed out that there is no universal and ultimate non-dimensional number that can characterize airblast primary breakup. Depending on the field of interest, a non-dimensional number (e.g. Weber number) might be more appropriate than another one (e.g. momentum flux ratio) to characterize the regime, and vice versa.

scholarly journals Application of Smoothed Particle Hydrodynamics (SPH) for the Simulation of Flow-like Landslides on 3D Terrains

2022 ◽  
Author(s):  
Binghui Cui ◽  
Liaojun Zhang
Keyword(s):  
Risk Assessment ◽  
Smoothed Particle Hydrodynamics ◽  
Disaster Mitigation ◽  
Sph Method ◽  
Landslide Event ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Simulation Results ◽  
Mitigation Design ◽  
The Impact

Abstract Flow-type landslide is one type of landslide that generally exhibits characteristics of high flow velocities, long jump distances, and poor predictability. Simulation of it facilitates propagation analysis and provides solutions for risk assessment and mitigation design. The smoothed particle hydrodynamics (SPH) method has been successfully applied to the simulation of two-dimensional (2D) and three-dimensional (3D) flow-like landslides. However, the influence of boundary resistance on the whole process of landslide failure is rarely discussed. In this study, a boundary algorithm considering the friction is proposed, and integrated into the boundary condition of the SPH method, and its accuracy is verified. Moreover, the Navier-Stokes equation combined with the non-Newtonian fluid rheology model was utilized to solve the dynamic behavior of the flow-like landslide. To verify its performance, the Shuicheng landslide event, which occurred in Guizhou, China, was taken as a case study. In the 2D simulation, a sensitivity analysis was conducted, and the results showed that the shearing strength parameters have more influence on the computation accuracy in comparison with the coefficient of viscosity. Afterwards, the dynamic characteristics of the landslide, such as the velocity and the impact area, were analyzed in the 3D simulation. The simulation results are in good agreement with the field investigations. The simulation results demonstrate that the SPH method performs well in reproducing the landslide process, and facilitates the analysis of landslide characteristics as well as the affected areas, which provides a scientific basis for conducting the risk assessment and disaster mitigation design.

Simulation Analysis on Strength of Bucket Tooth with Various Soil

2012 ◽  
Vol 619 ◽  
pp. 62-65 ◽  
Author(s):  
Ying Ying Zhang ◽  
Fan He ◽  
Cheng Long Li ◽  
Yang Gao ◽  
Peng Gao
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Large Scale ◽  
Maximum Stress ◽  
Simulation Analysis ◽  
Solid Model ◽  
Finite Element Software ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Smoothed Particle Hydrodynamics Method ◽  
Simulation Results

This paper applies large-scale finite element software ANSYS and the module of LS-DYNA to establish the solid model of bucket teeth, and according to Smoothed Particle Hydrodynamics Method (SPH) establishes the soil constitutive model. Emulating the process that bucket teeth excavate soil of three different grade ruggedness coefficients obtains the stress and statistical value of bucket tooth point; Simulation results show that: the stress concentration of bucket teeth point is more serious. When the ruggedness coefficient is0.6< f <1.0, the corresponding maximum stress is 197 ~ 309MPa, which meets the strength requirement .The damage is caused by the fatigue failure.

Numerical Simulations of the Spall Damage of the Target Material Induced by Laser Driven Flyer Impacting

2010 ◽  
Vol 156-157 ◽  
pp. 1305-1312
Author(s):  
He Jun Wang ◽  
Hui Xia Liu ◽  
Zong Bao Shen ◽  
Wei Li ◽  
Yuan Yuan Zheng ◽  
...  
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Target Material ◽  
Surface Velocity ◽  
Free Surface Velocity ◽  
Damage Distribution ◽  
Spall Damage ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Simulation Results ◽  
Constant Interest

The spall phenomenon has been a subject of constant interest for many years, and it is still widely investigated in various ways including the experiment. This paper uses the method of smoothed particle hydrodynamics and the model of Johnson-Cook tensile cumulative damage to simulate the process of spall induced by the laser-driven flyer loading. Using this method, some numerical simulation results can be obtained, like the different time of the 2D image of damage distribution and the rear free surface velocity histories of target material. These results could offer some useful messages for the study on spall damage.

Numerical Simulation of Rigid Cylindric Plate's Sinkage on Soil Based on SPH/FEM Method

2014 ◽  
Vol 1049-1050 ◽  
pp. 483-486
Author(s):  
Ting Xia ◽  
Gang He ◽  
Peng Hu ◽  
Xiao Long Li
Keyword(s):  
Numerical Simulation ◽  
Stress Distribution ◽  
Dynamic Simulation ◽  
Smoothed Particle Hydrodynamics ◽  
Mechanical Design ◽  
Material Model ◽  
Fem Method ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Simulation Results

Based on smoothed particle hydrodynamics (SPH) and FEM method, the dynamic simulation of rigid cylindric plate's sinking process on soil is studied with LS-DYNA software, and MAT 147 material model is used to describe soil's attributes. The stress distribution and flowing trend of the soil are compared at different period. The simulation results show that the SPH/FEM method is useful to analyze large deformation of soil, and our findings can give helps to the mechanical design of the components interacting with soil.

Using Smoothed Particle Hydrodynamics to Examine Influence of Process Parameters on Ultrasonic Machining

2014 ◽  
Vol 8 (6) ◽  
pp. 855-863 ◽  
Author(s):  
Jingsi Wang ◽  
◽  
Keita Shimada ◽  
Masayoshi Mizutani ◽  
Tsunemoto Kuriyagawa
Keyword(s):  
Process Parameters ◽  
Smoothed Particle Hydrodynamics ◽  
Soda Lime Glass ◽  
Process Conditions ◽  
Ultrasonic Machining ◽  
Machining Performance ◽  
Influence Of Process Parameters ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Simulation Results

The initiation and propagation of cracks generated on a work surface during UltraSonic Machining (USM) were simulated using Smoothed Particle Hydrodynamics (SPH). Different abrasive materials, tool materials, and abrasive sizes were used in this simulation. The distribution and size of the calculated cracks were found to be strongly influenced by different process conditions. According to the simulation results, using tools with a lower yield strength and slurry comprising softer and smaller abrasives decreases the crack size. Experiments were conducted to drill deep blind holes in soda-lime glass by USM and observe the cracks remaining on the machined surfaces. The experimental results agreed well with the simulation results. This work was the first to visualize the crack formation during USM under different process parameters with the SPH method. The results may be very useful for improving the machining performance of the USM process.

Smoothed Particle Hydrodynamics Simulations for Ultrasonic Machining of Different Workpiece Materials

2014 ◽  
Vol 1017 ◽  
pp. 758-763
Author(s):  
Jing Si Wang ◽  
Keita Shimada ◽  
Masayoshi Mizutani ◽  
Tunemoto Kuriyagawa
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Material Removal ◽  
Fracture Behavior ◽  
Ultrasonic Machining ◽  
Machining Performance ◽  
Sph Method ◽  
Particle Hydrodynamics ◽  
Hard And Brittle Materials ◽  
Smoothed Particle ◽  
Simulation Results

The material removal in ultrasonic machining (USM) is based on brittle fracturing of workpiece materials. The properties and fracture behavior are different for varied materials, and they would have an influence on the machining performance of USM. The smoothed particle hydrodynamics (SPH) method was used to simulate the USM process for different workpiece materials. Three typical hard and brittle materials, i.e. silicon carbide (SiC), alumina (Al2O3), and glass will be used as the workpiece materials. Experiments are also conducted for comparing with the simulation results. Through this study, the material fracturing processes for different work materials are shown visually using the SPH method, which is very useful for USM study.

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