Mesh-free peridynamic coupled simulation of impacting collapse of a granular column with various heights

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.

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A New Granular Column Collapse Device to Characterise Flowability of Bulk Materials

Proceedings ◽

10.3390/icem18-05389 ◽

2018 ◽

Vol 2 (8) ◽

pp. 488 ◽

Cited By ~ 2

Author(s):

Joel Torres-Serra ◽

Enrique Romero ◽

Antonio Rodríguez-Ferran

Keyword(s):

Bulk Materials ◽

Column Collapse ◽

Granular Column

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PSCAD-MATLAB Coupled Simulation Method for Power Flow Optimization using Continuous Reactive Power Controllable Device

Journal of Physics Conference Series ◽

10.1088/1742-6596/1754/1/012026 ◽

2021 ◽

Vol 1754 (1) ◽

pp. 012026

Author(s):

Fan Yang ◽

Kai Chen ◽

Shaofeng Qian ◽

JiangYang Zhan ◽

Rui Yu ◽

...

Keyword(s):

Power Flow ◽

Reactive Power ◽

Simulation Method ◽

Coupled Simulation ◽

Flow Optimization

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Thermo-hydraulic coupled simulation and analysis of a real large-scale complex district heating network in Tianjin

Energy ◽

10.1016/j.energy.2021.121389 ◽

2021 ◽

pp. 121389

Author(s):

Xuejing Zheng ◽

Qihang Sun ◽

Yaran Wang ◽

Lijun Zheng ◽

Xinyong Gao ◽

...

Keyword(s):

Large Scale ◽

District Heating ◽

Coupled Simulation

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Smoothed Particle Hydrodynamics Simulation of Orthogonal Cutting with Enhanced Thermal Modeling

Applied Sciences ◽

10.3390/app11031020 ◽

2021 ◽

Vol 11 (3) ◽

pp. 1020

Author(s):

Mohamadreza Afrasiabi ◽

Hagen Klippel ◽

Matthias Roethlin ◽

Konrad Wegener

Keyword(s):

Smoothed Particle Hydrodynamics ◽

Metal Cutting ◽

Thermal Modeling ◽

Orthogonal Cutting ◽

Detection Algorithm ◽

Mesh Free ◽

Particle Hydrodynamics ◽

Smoothed Particle ◽

Boundary Treatments ◽

Cutting Problems

Smoothed Particle Hydrodynamics (SPH) is a mesh-free numerical method that can simulate metal cutting problems efficiently. The thermal modeling of such processes with SPH, nevertheless, is not straightforward. The difficulty is rooted in the computationally demanding procedures regarding convergence properties and boundary treatments, both known as SPH Grand Challenges. This paper, therefore, intends to rectify these issues in SPH cutting models by proposing two improvements: (1) Implementing a higher-order Laplacian formulation to solve the heat equation more accurately. (2) Introducing a more realistic thermal boundary condition using a robust surface detection algorithm. We employ the proposed framework to simulate an orthogonal cutting process and validate the numerical results against the available experimental measurements.

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