When Particle Shifting is Expected to Improve Convergence of Lagrangian Smoothed Particle Hydrodynamics.

First Authors Lennart Beck
Authors Lennart Beck, Ivo F. Sbalzarini
Corresponding Authors Lennart Beck
Last Authors Ivo F. Sbalzarini
Conference Proceedings Volume Title Proceedings 18th SPHERIC International Workshop, 18-20 June 2024
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Conference Name 18th SPHERIC International Workshop
Conference Location Berlin, Germany
Conference Start Date 2024-06-18
Conference End Date 2024-06-20
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Publisher SPHERIC
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ISBN 978-3-00-079208-3
First Page 289
Last Page 296
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Print Publication Date 2024-06-20
Online Publication Date 2024-06-20
Abstract We introduce a metric to determine when particle shifting is expected to improve the convergence of weakly compressible Lagrangian SPH. Shifting regularizes particle positions by biasing them toward a more homogeneous distribution. However, shifting also introduces an additional discretization error. To quantify these two opposing effects, we analyze the two- dimensional Taylor-Green case and show that particle shifting is advantageous when there is strong-enough distortion in the particle distribution. We propose a dimensionless metric of particle distortion to predict this break-even point, which we show to behave qualitatively similar across simulation cases. Since the proposed metric can be computed in a running simulation, it can be used to control the onset of shifting.
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DOI 10.2139/ssrn.4527159
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Alternative Full Text URL https://papers.ssrn.com/sol3/papers.cfm?abstract_id=4527159
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Created By sbalzari
Added Date 2024-09-16
Last Edited By thuem
Last Edited Date 2025-06-25 14:12:45.661
Library ID 8795
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