Nyx: A MASSIVELY PARALLEL AMR CODE FOR COMPUTATIONAL COSMOLOGY

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:The Astrophysical journal 2013-03, Vol.765 (1), p.1-14
Hauptverfasser: Almgren, Ann S, Bell, John B, LUEWSKI, MIKE J, LUKIC, ZARIJA, Van Andel, Ethan
Format: Artikel
Sprache:eng
Schlagworte:
astronomy & astrophysics
ASTRONOMY AND ASTROPHYSICS
Blocking
Computation
Cosmology
Dark matter
Dynamical systems
Evolution
gravitation
Hierarchies
hydrodynamics
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; a particle-mesh 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:0004-637X
1538-4357
DOI:10.1088/0004-637X/765/1/39