Nyx: A Massively Parallel AMR Code for Computational Cosmology

Almgren, Ann S.; Bell, John B.; Lijewski, Mike J.; Lukić, Zarija; Van Andel, Ethan

doi:10.1088/0004-637x/765/1/39

Nyx: A Massively Parallel AMR Code for Computational Cosmology

Journal Article · Wed Feb 13 00:00:00 EST 2013 · The Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637x/765/1/39· OSTI ID:1565016

Almgren, Ann S. ^[1]; Bell, John B. ^[1]; Lijewski, Mike J. ^[1]; Lukić, Zarija ^[2]; Van Andel, Ethan ^[3]

Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Center for Computational Sciences and Engineering
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). Computational Cosmology Center
Univ. of California, Berkeley, CA (United States). Mathematics Dept.

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.

View Accepted Manuscript (DOE)

Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1565016

Alternate ID(s):: OSTI ID: 22167656

Journal Information:: The Astrophysical Journal, Journal Name: The Astrophysical Journal Journal Issue: 1 Vol. 765; ISSN 0004-637X

Publisher:: Institute of Physics (IOP)Copyright Statement

Country of Publication:: United States

Language:: English

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