SPH modeling of fluid-structure interaction

Han, Luhui; Hu, Xiangyu

doi:10.1007/s42241-018-0006-9

Cited by 71 publications

(34 citation statements)

References 21 publications

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“…reached. It can be observed that these results are in quite good agreements with those from previous simulations [49,14,50]. Fig.…”

Section: Flow-induced Vibration Of An Elastic Beam Attached To a Cylisupporting

confidence: 90%

“…Note that the trajectory of point S shows a typical Lissajous curve with a frequency ratio of 2 : 1 between horizontal and vertical components [50]. [49,50,51,14]. The dimensionless amplitude demonstrates a good agreement, however, slight discrepancies are noted in the dimensionless oscillation frequency.…”

Section: Flow-induced Vibration Of An Elastic Beam Attached To a Cylimentioning

confidence: 88%

“…Note that the transport-velocity formulation is applied herein with the back- [49,14], where U 0 = 1ms −1 . The in-…”

Section: Flow-induced Vibration Of An Elastic Beam Attached To a Cylimentioning

confidence: 99%

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Dual-criteria time stepping for weakly compressible smoothed particle hydrodynamics

Zhang

Rezavand

2020

Journal of Computational Physics

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Implementing particle-interaction configuration and time integration are performance intensive essentials of particle-based methods. In this paper, a dualcriteria time-stepping method is proposed to improve the computational efficiency of the weakly-compressible smoothed particle hydrodynamic (WCSPH) method for modeling incompressible flows. The key idea is to introduce an advection time criterion, which is based on fluid velocity field, for recreating the particle-interaction configuration. Within this time criterion, several steps of pressure relaxation determined by the acoustic time criterion, based on the artificial speed of sound, can be carried out without updating the particle interaction configuration and much larger time-step sizes compared with the conventional counterpart. The method has shown optimized computational performance through CPU cost analysis. Good accuracy and performance is obtained for the presented benchmarks implying promising potential of the proposed method for incompressible flow and fluid-structure interaction simulations.

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“…reached. It can be observed that these results are in quite good agreements with those from previous simulations [49,14,50]. Fig.…”

Section: Flow-induced Vibration Of An Elastic Beam Attached To a Cylisupporting

confidence: 90%

Section: Flow-induced Vibration Of An Elastic Beam Attached To a Cylimentioning

confidence: 88%

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Dual-criteria time stepping for weakly compressible smoothed particle hydrodynamics

Zhang

Rezavand

2020

Journal of Computational Physics

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“…Total Lagrangian particle formulations for the structure are sensible as this approach alleviates known numerical instabilities in computational solid mechanics. Han & Hu [109] considered an SPH FSI model, employing SPH with a transport velocity formulation for the fluid, combined with a total Lagrangian formulation for the structure—the coupling here is, of course, made relatively straightforward as both governing equations are solved within the SPH framework. A fluid–structure dam break problem has been considered by Sun et al [83] that similarly combines SPH with a total Lagrangian particle method for the structure.…”

Section: Coupling With Other Methodsmentioning

confidence: 99%

Review of smoothed particle hydrodynamics: towards converged Lagrangian flow modelling

2020

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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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“…FEM is to divide a complete solution area into finite triangles, which are connected but not coincident [5]. The polynomial difference is used to solve each triangle region.…”

Section: Femmentioning

confidence: 99%

A Novel Approach for the Numerical Simulation of Fluid-Structure Interaction Problems in the Presence of Debris

Ren¹,

Shu²

2020

Fluid Dynamics &Amp; Materials Processing

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A novel algorithm is proposed for the simulation of fluid-structure interaction problems. In particular, much attention is paid to natural phenomena such as debris flow. The fluid part (debris flow fluid) is simulated in the framework of the smoothed particle hydrodynamics (SPH) approach, while the solid part (downstream obstacles) is treated using the finite element method (FEM). Fluid-structure coupling is implemented through dynamic boundary conditions. In particular, the software "TensorFlow" and an algorithm based on Python are combined to conduct the required calculations. The simulation results show that the dynamics of viscous and non-viscous debris flows can be extremely different when there are obstacles in the downstream direction. The implemented SPH-FEM coupling method can simulate the fluid-structure coupling problem with a reasonable approximation.

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SPH modeling of fluid-structure interaction

Cited by 71 publications

References 21 publications

Dual-criteria time stepping for weakly compressible smoothed particle hydrodynamics

Dual-criteria time stepping for weakly compressible smoothed particle hydrodynamics

Review of smoothed particle hydrodynamics: towards converged Lagrangian flow modelling

A Novel Approach for the Numerical Simulation of Fluid-Structure Interaction Problems in the Presence of Debris

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