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

Enrico Napoli, Alessandra Monteleone, Barbara Milici, Mauro De Marchis, Barbara Milici, Mauro De Marchis

Risultato della ricerca: Article

Abstract

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.
Lingua originaleEnglish
pagine (da-a)956-977
Numero di pagine22
RivistaDefault journal
Volume340
Stato di pubblicazionePublished - 2018

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • Physics and Astronomy(all)
  • Computer Science Applications

Cita questo

A multi-domain approach for smoothed particle hydrodynamics simulations of highly complex flows. / Napoli, Enrico; Monteleone, Alessandra; Milici, Barbara; De Marchis, Mauro; Milici, Barbara; De Marchis, Mauro.

In: Default journal, Vol. 340, 2018, pag. 956-977.

Risultato della ricerca: Article

Napoli, E, Monteleone, A, Milici, B, De Marchis, M, Milici, B & De Marchis, M 2018, 'A multi-domain approach for smoothed particle hydrodynamics simulations of highly complex flows', Default journal, vol. 340, pagg. 956-977.
Napoli, Enrico ; Monteleone, Alessandra ; Milici, Barbara ; De Marchis, Mauro ; Milici, Barbara ; De Marchis, Mauro. / A multi-domain approach for smoothed particle hydrodynamics simulations of highly complex flows. In: Default journal. 2018 ; Vol. 340. pagg. 956-977.
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AU - Napoli, Enrico

AU - Monteleone, Alessandra

AU - Milici, Barbara

AU - De Marchis, Mauro

AU - Milici, Barbara

AU - De Marchis, Mauro

PY - 2018

Y1 - 2018

N2 - 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.

AB - 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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KW - Computational Mechanics

KW - Computer Science Applications1707 Computer Vision and Pattern Recognition

KW - Domain decomposition

KW - ISPH

KW - Mechanical Engineering

KW - Mechanics of Materials

KW - Mirror particles

KW - Multi-block

KW - Physics and Astronomy (all)

KW - Smoothed particle hydrodynamics

UR - http://hdl.handle.net/10447/338241

UR - http://www.journals.elsevier.com/computer-methods-in-applied-mechanics-and-engineering/

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