Three-phase 3D modelling of a laser cutting process using smoothed particle hydrodynamics (SPH)

2012 ◽  
Author(s):  
Noorhafiza Muhammad ◽  
Benedict Rogers ◽  
Lin Li
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Laser Cutting ◽  
3D Modelling ◽  
Cutting Process ◽  
Three Phase ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Modeling of Waterjet Abrasion in Mining Processes Based on the Smoothed Particle Hydrodynamics (SPH) Method

2019 ◽  
Vol 17 (09) ◽  
pp. 1950075
Author(s):  
Long Feng ◽  
Xiangwei Dong ◽  
Zengliang Li ◽  
Guirong Liu ◽  
Zhaocheng Sun
Keyword(s):  
Coal Mining ◽  
Smoothed Particle Hydrodynamics ◽  
Target Material ◽  
Solid Material ◽  
Cutting Process ◽  
Abrasive Waterjet ◽  
Abrasive Particles ◽  
Particle Hydrodynamics ◽  
Sph Model ◽  
Smoothed Particle

Abrasive waterjet is widely used for mass-cutting during coal mining or other mining process. Such a cutting process involves complex fluid–solid coupling, which require an effective method capable of simulating the large deformation and spalling of materials. This paper uses method of smoothed particle hydrodynamics (SPH) to establish a model to simulate the cutting process of coal seams by abrasive waterjets. In our SPH model, both fluid and solid are discretized with SPH particles. These particles are different in physical properties representing waterjet, abrasive particles and target materials. The waterjet is treated as viscous fluid and the coal (as a target material) is modeled as a brittle solid material. All these SPH particles of various medium are governed by the Navier–Stokes (NS) equations. Our established SPH model is then applied to study the efficiency of coal cutting using different waterjet formations. The results show that the cutting efficiency of the abrasive waterjet is higher than that of the standard waterjet. Our SPH model is capable of reveal the detailed interactions of the micro waterjet abrasive particles with the particles on the surface of coal. It enables the study on the mechanisms of coal seam breaking and cutting processes. It provides an effective computational tool for improving the efficiency of coal mining and of the development of new techniques for coal mining.

Simulation des orthogonalen Zerspanens mit LS-Dyna*/Simulation of the orthogonal cutting process with LS-Dyna - Comparison of Lagrangian-, Eulerian- and SPH cutting models

2017 ◽  
Vol 107 (01-02) ◽  
pp. 34-38
Author(s):  
M. Storchak ◽  
F. Diemer
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Wide Spectrum ◽  
Orthogonal Cutting ◽  
Cutting Process ◽  
Eulerian Model ◽  
Advantages And Disadvantages ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Cutting Processes ◽  
Cutting Model

Immer häufiger kommen Simulationsergebnisse zur Optimierung von Zerspanprozessen zum Einsatz. Dabei wird ein sehr breites Spektrum verschiedener Techniken und Algorithmen verwendet. Für die entsprechende Auswahl muss der Anwendungsingenieur eine Überprüfung der Vor- und Nachteile der verschiedenen Algorithmen bei der Erstellung und Verwendung der numerischen Zerspanmodelle in Bezug auf den jeweils vorliegenden Zerpanprozess vornehmen. In diesem Artikel werden unterschiedliche Berechnungs- und Ansatzalgorithmen anhand von vier Zerspanmodellen – Lagrange‘sches Modell mit und ohne Remeshing, Euler’sches Modell und SPH (Smoothed Particle Hydrodynamics)-Modell – erarbeitet und miteinander sowie mit den experimentell gewonnenen Daten verglichen.   More and more results from simulations are being used to optimize cutting processes. To accomplish this, a very wide spectrum of different techniques and algorithms is applied. The engineer is required to find the advantages and disadvantages of the different algorithms used for development and employment in the numerical cutting model. This paper compares different calculation and approach algorithms on the basis of four different cutting models - Lagrange model with and without Remeshing, Eulerian model and SPH (Smoothed Particle Hydrodynamics)-model - as well as experimentally gained data.

Simulation de l'écoulement au cours du procédé de rotomoulage par la méthode Smoothed Particle Hydrodynamics (SPH)

2008 ◽  
Vol 96 (6) ◽  
pp. 263-268 ◽  
Author(s):  
E. Mounif ◽  
V. Bellenger ◽  
A. Ammar ◽  
R. Ata ◽  
P. Mazabraud ◽  
...  
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

Numerical Simulation of Flow in Complex Geometries by Using Smoothed Particle Hydrodynamics

2020 ◽  
Vol 59 (40) ◽  
pp. 18236-18246
Author(s):  
Tianwen Dong ◽  
Yadong He ◽  
Jianchun Wu ◽  
Shiyu Jiang ◽  
Xingyuan Huang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Smoothed Particle Hydrodynamics ◽  
Complex Geometries ◽  
Particle Hydrodynamics ◽  
Smoothed Particle

scholarly journals Review of smoothed particle hydrodynamics: towards converged Lagrangian flow modelling

2020 ◽  
Vol 476 (2241) ◽  
pp. 20190801
Author(s):  
Steven J. Lind ◽  
Benedict D. Rogers ◽  
Peter K. Stansby
Keyword(s):  
Smoothed Particle Hydrodynamics ◽  
Graphics Processing Units ◽  
Wave Structure ◽  
Free Form ◽  
Mesh Free ◽  
Weakly Compressible ◽  
Particle Hydrodynamics ◽  
Massively Parallel Computing ◽  
Smoothed Particle ◽  
Graphics Processing

This paper presents a review of the progress of smoothed particle hydrodynamics (SPH) towards high-order converged simulations. As a mesh-free Lagrangian method suitable for complex flows with interfaces and multiple phases, SPH has developed considerably in the past decade. While original applications were in astrophysics, early engineering applications showed the versatility and robustness of the method without emphasis on accuracy and convergence. The early method was of weakly compressible form resulting in noisy pressures due to spurious pressure waves. This was effectively removed in the incompressible (divergence-free) form which followed; since then the weakly compressible form has been advanced, reducing pressure noise. Now numerical convergence studies are standard. While the method is computationally demanding on conventional processors, it is well suited to parallel processing on massively parallel computing and graphics processing units. Applications are diverse and encompass wave–structure interaction, geophysical flows due to landslides, nuclear sludge flows, welding, gearbox flows and many others. In the state of the art, convergence is typically between the first- and second-order theoretical limits. Recent advances are improving convergence to fourth order (and higher) and these will also be outlined. This can be necessary to resolve multi-scale aspects of turbulent flow.

Smoothed particle hydrodynamics versus finite element method for blast impact

2013 ◽  
Vol 61 (1) ◽  
pp. 111-121 ◽  
Author(s):  
T. Jankowiak ◽  
T. Łodygowski
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Smoothed Particle Hydrodynamics ◽  
Concrete Slab ◽  
The Finite Element Method ◽  
Particle Hydrodynamics ◽  
Mesh Density ◽  
Smoothed Particle ◽  
Element Method

Abstract The paper considers the failure study of concrete structures loaded by the pressure wave due to detonation of an explosive material. In the paper two numerical methods are used and their efficiency and accuracy are compared. There are the Smoothed Particle Hydrodynamics (SPH) and the Finite Element Method (FEM). The numerical examples take into account the dynamic behaviour of concrete slab or a structure composed of two concrete slabs subjected to the blast impact coming from one side. The influence of reinforcement in the slab (1, 2 or 3 layers) is also presented and compared with a pure concrete one. The influence of mesh density for FEM and the influence of important parameters in SPH like a smoothing length or a particle distance on the quality of the results are discussed in the paper

Sign in / Sign up

Export Citation Format

Share Document