Smoothed particle hydrodynamics with adaptive spatial resolution (SPH-ASR) for free surface flows

Xiufeng Yang, Song Charng Kong, Moubin Liu, Qingquan Liu*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

A numerical method based on smoothed particle hydrodynamics with adaptive spatial resolution (SPH-ASR) was developed for simulating free surface flows. This method can reduce the computational demands while maintaining the numerical accuracy. In this method, the spatial resolution changes adaptively according to the distance to the free surface by numerical particle splitting and merging. The particles are split for refinement when they are near the free surface, while they are merged for coarsening when they are away from the free surface. A search algorithm was implemented for identifying the particles at the free surface. A particle shifting technique, considering variable smoothing length, was introduced to improve the particle distribution. The presented SPH-ASR method was validated by simulating various free surface flows, and the results were compared to those obtained using SPH with uniform spatial resolution (USR) and experimental data.

Original languageEnglish
Article number110539
JournalJournal of Computational Physics
Volume443
DOIs
Publication statusPublished - 15 Oct 2021

Keywords

  • Adaptive spatial resolution
  • Free surface flow
  • Particle refinement
  • Smoothed particle hydrodynamics
  • Variable smoothing length

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