Nyx: A Massively Parallel AMR Code for Computational Cosmology

We present a new N-body and gas dynamics code, called Nyx, for large-scale cosmological simulations. Nyx follows the temporal evolution of a system of discrete dark matter particles gravitationally coupled to an inviscid ideal fluid in an expanding universe. The gas is advanced in an Eulerian framew...

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Veröffentlicht in:	arXiv.org 2013-01
Hauptverfasser:	Almgren, Ann, Bell, John, Lijewski, Mike, Lukić, Zarija, Ethan Van Andel
Format:	Artikel
Sprache:	eng
Schlagworte:	Computation Computer simulation Cosmology Dark matter Finite element method Gas dynamics Grid refinement (mathematics) Ideal fluids Physics - Cosmology and Nongalactic Astrophysics Physics - Instrumentation and Methods for Astrophysics Universe
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Beschreibung
Zusammenfassung:	We present a new N-body and gas dynamics code, called Nyx, for large-scale cosmological simulations. Nyx follows the temporal evolution of a system of discrete dark matter particles gravitationally coupled to an inviscid ideal fluid in an expanding universe. The gas is advanced in an Eulerian framework with block-structured adaptive mesh refinement (AMR); a particle-mesh (PM) scheme using the same grid hierarchy is used to solve for self-gravity and advance the particles. Computational results demonstrating the validation of Nyx on standard cosmological test problems, and the scaling behavior of Nyx to 50,000 cores, are presented.
ISSN:	2331-8422
DOI:	10.48550/arxiv.1301.4498