Journal
ASTROPHYSICAL JOURNAL
Volume 765, Issue 1, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/0004-637X/765/1/39
Keywords
gravitation; hydrodynamics; methods: numerical
Categories
Funding
- Laboratory Directed Research and Development from Berkeley Lab
- Office of Science, of the U.S. Department of Energy [DE-AC02-05CH11231]
- Scientific Discovery through Advanced Computing (SciDAC) program
- U.S. Department of Energy Office of Advanced Scientific Computing Research (and Office of Basic Energy Sciences/Biological and Environmental Research/High Energy Physics/Fusion Energy Sciences/Nuclear Physics)
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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.
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