Abstract

Smoothing sequences in smoothed particle hydrodynamics (SPH) contain numerous discontinuities. In general, in science, discontinuities are well known to cause inaccuracy if smoothing is performed without taking the discontinuity into consideration, most commonly referred to as the Gibbs phenomenon. We found that 24%–27% of the fluid particles at any given time step have sequences containing one or more discontinuities in typical benchmark fluid problems. The effect of taking the discontinuities into consideration for the fluid particles that show coherent vorticity resulted typically in a 50% of change in particle movement compared to that particle’s movement from its current time step to the next. First and second generation wavelets were used for discontinuity identification and vorticity analysis, respectively. Results of a sloshing tank case simulated by the SPH method were used for the analysis.

Details

Title
Coherent vorticity and discontinuous flow in particle-based SPH modeling
Author
Brun, Oddny H; Kider, Joseph T; JR.; Wiegand, R Paul
Pages
224-236
Publication year
2022
Publication date
Sep 27, 2022
Publisher
W I T Press
ISSN
20460546
e-ISSN
20460554
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2723884576
Copyright
© 2022. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the associated terms available at https://www.witpress.com/journals/cmem or in accordance with the terms at https://creativecommons.org/licenses/by/4.0/ (the “License”), if applicable