Published March 1, 2013 | Version v1
Journal article Metadata-only

Nyx: A MASSIVELY PARALLEL AMR CODE FOR COMPUTATIONAL COSMOLOGY

Creators

  • 1. Center for Computational Sciences and Engineering, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)
  • 2. Computational Cosmology Center, Lawrence Berkeley National Laboratory, Berkeley, CA 94720 (United States)
  • 3. Mathematics Department, UC Berkeley, Berkeley, CA 94720 (United States)

Description

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.

Availability note (English)

Available from http://dx.doi.org/10.1088/0004-637X/765/1/39

Additional details

Identifiers

DOI
10.1088/0004-637X/765/1/39;

Publishing Information

Journal Title
Astrophysical Journal
Journal Volume
765
Journal Issue
1
Journal Page Range
[14 p.]
ISSN
0004-637X
CODEN
ASJOAB

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
44122112
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
COMPUTERIZED SIMULATION; COSMOLOGICAL MODELS; COSMOLOGY; COUPLING; GRAVITATION; HYDRODYNAMICS; IDEAL FLOW; N CODES; NONLUMINOUS MATTER; TIME DEPENDENCE; UNIVERSE; VALIDATION
Descriptors DEC
COMPUTER CODES; FLUID FLOW; FLUID MECHANICS; INCOMPRESSIBLE FLOW; MATHEMATICAL MODELS; MATTER; MECHANICS; SIMULATION; STEADY FLOW; TESTING