A piecewise parabolic method for cosmological hydrodynamics

Greg L. Bryan, Michael L. Norman, James M. Stone, Renyue Cen, Jeremiah P. Ostriker

Research output: Contribution to journalArticle

141 Scopus citations

Abstract

We describe a hybrid scheme for cosmological simulations that incorporates a Lagrangean particle-mesh (PM) algorithm to follow the collisionless matter with the higher order accurate piecewise parabolic method (PPM) to solve the equations of gas dynamics. Both components interact through the gravitational potential, which requires the solution of Poisson's equation, here done by Fourier transforms. Due to the vast range of conditions that occur in cosmological flows (pressure differences of up to fourteen orders of magnitude), a number of additions and modifications to PPM were required to produce accurate results. These are described, as are a suite of cosmological tests.

Original languageEnglish (US)
Pages (from-to)149-168
Number of pages20
JournalComputer Physics Communications
Volume89
Issue number1-3
DOIs
StatePublished - Aug 2 1995
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Hardware and Architecture
  • Physics and Astronomy(all)

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