Multiscale Smoothed Particle Hydrodynamics based on a domain-decomposition strategy

Francesco Ricci, Renato Vacondio, Angelantonio Tafuni

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

A multi-resolution algorithm for weakly-compressible Smoothed Particle Hydrodynamics is hereby proposed. The approach chosen is based on a domain decomposition to subdivide the computational domain into regions with different resolutions. Each sub-problem is closed by appropriate Dirichlet boundary conditions that are enforced via buffer regions, populated by particles whose physical quantities are obtained by means of an interpolation over adjacent sub-domains. The algorithm has been implemented into the DualSPHysics open-source code and it has been tested and validated through a series of different study cases. The capability of the numerical scheme to simulate multiscale fluid flow has been demonstrated by solving the flow past a cylinder for a Reynolds number of 9,500 and a ratio between the largest and smallest particle size equal to 28. Furthermore, the proposed SPH multi-resolution algorithm can also be used for flow around moving objects, such as an oscillating cylinder in cross-flow, and free-surface flow, such as the simulation of a triangular wedge impacting on the free surface of a quiescent liquid.

Original languageEnglish (US)
Article number116500
JournalComputer Methods in Applied Mechanics and Engineering
Volume418
DOIs
StatePublished - Jan 1 2024

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials
  • Mechanical Engineering
  • General Physics and Astronomy
  • Computer Science Applications

Keywords

  • DualSPHysics
  • Meshless
  • Navier–Stokes
  • Particle
  • SPH
  • Variable resolution

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