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Smoothed particle hydrodynamics physically reconsidered: The relation to explicit large eddy simulation and the issue of particle duality

Okraschevski, M. ORCID iD icon 1; Buerkle, N. ORCID iD icon 2; Koch, R. 2; Bauer, H.-J. 2
1 Institut für Thermische Strömungsmaschinen (ITS), Karlsruher Institut für Technologie (KIT)
2 Karlsruher Institut für Technologie (KIT)

Abstract:

In this work, we will identify a novel relation between Smoothed Particle Hydrodynamics (SPH) and explicit large eddy simulation using a coarse-graining method from non-equilibrium molecular dynamics. While the current literature points at the conclusion that characteristic SPH issues become restrictive for subsonic turbulent flows, we see the potential to mitigate these SPH issues by explicit subfilter stress modeling. We verify our theory by various simulations of homogeneous, isotropic turbulence at 𝑅𝑒=10$^4$ and compare the results to a direct numerical simulation [T. Dairay et al., “Numerical dissipation vs subgrid-scale modelling for large eddy simulation,” J. Comput. Phys. 337, 252–274 (2017)]. Although the simulations substantiate our theory, we see another issue arising, which is conceptually rooted in the particle itself, termed as particle duality. Finally, we conclude our work by acknowledging SPH as a coarse-graining method for turbulent flows, highlighting its capabilities and limitations


Verlagsausgabe §
DOI: 10.5445/IR/1000152282
Veröffentlicht am 01.12.2023
Originalveröffentlichung
DOI: 10.1063/5.0105104
Scopus
Zitationen: 2
Web of Science
Zitationen: 2
Dimensions
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Thermische Strömungsmaschinen (ITS)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 11.2022
Sprache Englisch
Identifikator ISSN: 1070-6631, 1089-7666
KITopen-ID: 1000152282
Erschienen in Physics of Fluids
Verlag American Institute of Physics (AIP)
Band 34
Heft 11
Seiten Artkl.Nr.: 115108
Nachgewiesen in Dimensions
Web of Science
Scopus
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