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Title: Rapid Optimal SPH Particle Distributions in Spherical Geometries For Creating Astrophysical Initial Conditions

Journal Article · · The Astrophysical Journal (Online)
 [1];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Creating spherical initial conditions in smoothed particle hydrodynamics simulations that are spherically conformal is a difficult task. Here in this paper, we describe two algorithmic methods for evenly distributing points on surfaces that when paired can be used to build three-dimensional spherical objects with optimal equipartition of volume between particles, commensurate with an arbitrary radial density function. We demonstrate the efficacy of our method against stretched lattice arrangements on the metrics of hydrodynamic stability, spherical conformity, and the harmonic power distribution of gravitational settling oscillations. We further demonstrate how our method is highly optimized for simulating multi-material spheres, such as planets with core–mantle boundaries.

Research Organization:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1438770
Report Number(s):
LLNL-JRNL-679768; TRN: US1900519
Journal Information:
The Astrophysical Journal (Online), Vol. 820, Issue 2; ISSN 1538-4357
Publisher:
Institute of Physics (IOP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 7 works
Citation information provided by
Web of Science

References (15)

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Cited By (4)

Mass transfer in white dwarf–neutron star binaries journal February 2017
Planetary giant impacts: convergence of high-resolution simulations using efficient spherical initial conditions and swift journal June 2019
Consequences of Giant Impacts on Early Uranus for Rotation, Internal Structure, Debris, and Atmospheric Erosion journal July 2018
Consequences of Giant Impacts on Early Uranus for Rotation, Internal Structure, Debris, and Atmospheric Erosion text January 2018

Figures / Tables (8)

Fig. 1(p. 6)figure Fig. 1
Fig. 2(p. 7)figure Fig. 2
Fig. 3(p. 8)figure Fig. 3
Fig. 4(p. 9)figure Fig. 4
Fig. 5(p. 15)figure Fig. 5
Fig. 6(p. 16)figure Fig. 6
Fig. 7(p. 16)figure Fig. 7
Fig. 8(p. 17)figure Fig. 8

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