1996/08/05 by Andrew Sornborger, A. Sornborger, Sornborger, A. +7
Computer Science · Earth and Planetary Sciences · Physics and Astronomy · #Astrophysics (astro-ph) #Computational Physics and Python Applications #FOS: Physical sciences #Geophysics and Gravity Measurements #Solar and Space Plasma Dynamics #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9608019
43 pages (including 18 figures), LaTeX type, mpeg simulations available at http://www.damtp.cam.ac.uk/user/ats25/, submitted Ap. J. Supp
arxiv created 1996/08/05 · openalex publication_date 1996/08/05 · arxiv updated 2009/12/01 · openalex created_date 2024/04/11 · openalex updated_date 2026/07/28
We present a method for integrating the cosmological hydrodynamical equations including a collisionless dark matter component. For modelling the baryonic matter component, we use the Piecewise Parabolic Method (PPM) which is a high-accuracy shock capturing technique. The dark matter component is modeled using gravitationally interacting particles whose evolution is determined using standard particle-in-cell techniques. We discuss details of the inclusion of gravity and expansion in the PPM code and give results of a number of tests of the code. This code has been developed for a massively parallel, SIMD supercomputer: the MasPar MP-2 parallel processor. We present details of the techniques we have used to implement the code for this architecture and discuss performance of the code on the MP-2. The code processes 5.0 × 104 grid zones per second and requires 53 seconds of machine time for a single timestep in a 1283 simulation.