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Shock-Capturing Particle Hydrodynamics with Reproducing Kernels
Stockholm University, Faculty of Science, Department of Astronomy. Stockholm University, Faculty of Science, The Oskar Klein Centre for Cosmo Particle Physics (OKC). University of Hamburg, Germany.ORCID iD: 0000-0002-3833-8520
Number of Authors: 12025 (English)In: CMES - Computer Modeling in Engineering & Sciences, ISSN 1526-1492, E-ISSN 1526-1506, Vol. 143, no 2, p. 1713-1741Article in journal (Refereed) Published
Abstract [en]

We present and explore a new shock-capturing particle hydrodynamics approach. Our starting point is a commonly used discretization of smoothed particle hydrodynamics. We enhance this discretization with Roe’s approximate Riemann solver, we identify its dissipative terms, and in these terms, we use slope-limited linear reconstruction. All gradients needed for our method are calculated with linearly reproducing kernels that are constructed to enforce the two lowest-order consistency relations. We scrutinize our reproducing kernel implementation carefully on a “glass-like” particle distribution, and we find that constant and linear functions are recovered to machine precision. We probe our method in a series of challenging 3D benchmark problems ranging from shocks over instabilities to Schulz-Rinne-type vorticity-creating shocks. All of our simulations show excellent agreement with analytic/reference solutions.

Place, publisher, year, edition, pages
2025. Vol. 143, no 2, p. 1713-1741
Keywords [en]
Ideal hydrodynamics, instabilities, reproducing kernels, shocks, smoothed particle hydrodynamics
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Identifiers
URN: urn:nbn:se:su:diva-246193DOI: 10.32604/cmes.2025.062063ISI: 001503920800001Scopus ID: 2-s2.0-105007970447OAI: oai:DiVA.org:su-246193DiVA, id: diva2:1993372
Available from: 2025-08-29 Created: 2025-08-29 Last updated: 2025-08-29Bibliographically approved

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Rosswog, Stephan

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