The overlapping particle technique for multi-resolution simulation of particle methods

Shibata, Kazuya; Koshizuka, Seiichi; Matsunaga, Takuya; Masaie, Issei

doi:10.1016/j.cma.2017.06.030

Cited by 51 publications

(17 citation statements)

References 56 publications

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“…Tang et al [2016] developed improved multi-resolution scheme by utilizing averaged influence length as well as employing a modification parameter in weight averaging process. Shibata et al [2017] proposed overlapping particle technique, based on which separated domains of high and low resolutions were connected to each other by considering an overlapping region. In general, fluid-structure interactions can be divided into two major categories of fluid flow interactions with rigid structures and deformable ones.…”

Section: Multi-scale Simulationsmentioning

confidence: 99%

On the state-of-the-art of particle methods for coastal and ocean engineering

Gotoh

Khayyer

2018

Coastal Engineering Journal

273

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The paper aims at providing an up-to-date review on several latest advancements related to particle methods with applications in coastal and ocean engineering. The latest advancements corresponding to accuracy, stability, conservation properties, multi-phase multi-physics multi-scale simulations, fluid-structure interactions, exclusive coastal/ocean engineering applications and computational efficiency are reviewed. The future perspectives for further enhancement of applicability and reliability of particle methods for coastal/ocean engineering applications are also highlighted.

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Section: Multi-scale Simulationsmentioning

confidence: 99%

On the state-of-the-art of particle methods for coastal and ocean engineering

Gotoh

Khayyer

2018

Coastal Engineering Journal

273

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“…The Lagrangian meshfree particle methods, including smoothed particle hydrodynamics (SPH) 1 and moving particle semi-implicit (MPS) 2 methods, have great advantages in simulating complicated interfacial flows. During recent years, the particle methods have been used to simulate free surface flow (eg, dam break, 2,3 sloshing, 4 waves, 5,6 and droplet deformation 7,8 ), multiphase flow (eg, gas-liquid, [9][10][11][12] liquid-liquid [13][14][15] flows) and fluid-solid interaction flow (eg, fluid-rigid- [16][17][18][19][20][21][22] and fluid-elastic-structure 23,24 interactions). Meanwhile, the accuracy and stability of particle methods have been remarkably improved to enhance the reliability.…”

Section: Introductionmentioning

confidence: 99%

Imposing accurate wall boundary conditions in corrective‐matrix‐based moving particle semi‐implicit method for free surface flow

Duan

Matsunaga

Yamaji

et al. 2020

Numerical Methods in Fluids

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Corrective matrix that is derived to restore consistency of discretization schemes can significantly enhance accuracy for the inside particles in the Moving Particle Semi-implicit method. In this situation, the error due to free surface and wall boundaries becomes dominant. Based on the recent study on Neumann boundary condition (Matsunaga et al, CMAME, 2020), the corrective matrix schemes in MPS are generalized to straightforwardly and accurately impose Neumann boundary condition. However, the new schemes can still easily trigger instability at free surface because of the biased error caused by the incomplete/biased neighbor support. Therefore, the existing stable schemes based on virtual particles and conservative gradient models are applied to free surface and nearby particles to produce a stable transitional layer at free surface. The new corrective matrix schemes are only applied to the particles under the stable transitional layer for improving the wall boundary conditions. Three numerical examples of free surface flows demonstrate that the proposed method can help to reduce the pressure/velocity fluctuations and hence enhance accuracy further.

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“…Here a different approach is proposed, based on multi-domain decomposition, which allows to use different values of the smoothing length in the blocks, while maintaining inside each of them the simplicity of the classic SPH method with constant h. In the proposed procedure, differently from Shibata et al (2017), no overlapping of the subdomains is employed, thus avoiding any artificial increase of the computational domain. During the simulations the particles leaving each subdomain through the internal interfaces (outflow) are removed from the computation, while a specific procedure allows to generate new particles in correspondence of inflow interfaces.…”

Section: Introductionmentioning

confidence: 99%

A multi-domain approach for smoothed particle hydrodynamics simulations of highly complex flows

Monteleone

Marchis

Milici

et al. 2018

Computer Methods in Applied Mechanics and Engineering

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An efficient and accurate method is proposed to solve the incompressible flow momentum and continuity equations in computational domains partitioned into subdomains in the framework of the smoothed particle hydrodynamics method. The procedure does not require any overlap of the subdomains, which would result in the increase of the computational effort. Perfectly matching solutions are obtained at the surfaces separating neighboring blocks. The block interfaces can be both planar and curved surfaces allowing to easily decompose even geometrically complex domains.The smoothing length of the kernel function is maintained constant in each subdomain, while changing between blocks where a different resolution is required. Particles leaving each block through the interfaces are deactivated and correspondingly new particles are generated at the neighboring block using a dynamically adaptive procedure to control their frequency of release. No splitting and coalescing method is thus employed to take into account the different size and mass of the particles going through the interfaces. Mass conservation is guaranteed during the procedure, which is a challenging task in a Lagrangian method based on the domain decomposition.The test cases in both 2D and 3D approximation show the accuracy of the method and its ability to strongly reduce the computational efforts through a multi-resolution approach.

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The overlapping particle technique for multi-resolution simulation of particle methods

Cited by 51 publications

References 56 publications

On the state-of-the-art of particle methods for coastal and ocean engineering

On the state-of-the-art of particle methods for coastal and ocean engineering

Imposing accurate wall boundary conditions in corrective‐matrix‐based moving particle semi‐implicit method for free surface flow

A multi-domain approach for smoothed particle hydrodynamics simulations of highly complex flows

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