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

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...

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Bibliographic Details
Published inarXiv.org
Main Authors Yang, Xiufeng, Song-Charng Kong, Liu, Moubin, Liu, Qingquan
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 04.08.2020
Subjects
Coarsening
Computational fluid dynamics
Computer simulation
Fluid flow
Fluid mechanics
Free surfaces
Numerical methods
Physics - Computational Physics
Physics - Fluid Dynamics
Search algorithms
Smooth particle hydrodynamics
Spatial resolution
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Summary: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.
ISSN:2331-8422
DOI:10.48550/arxiv.2008.01326