Tuesday, January 22, 2013

1301.4498 (Ann Almgren et al.)

Nyx: A Massively Parallel AMR Code for Computational Cosmology    [PDF]

Ann Almgren, John Bell, Mike Lijewski, Zarija Lukić, Ethan Van Andel
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.
View original: http://arxiv.org/abs/1301.4498

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