TY - JOUR

T1 - A piecewise parabolic method for cosmological hydrodynamics

AU - Bryan, Greg L.

AU - Norman, Michael L.

AU - Stone, James M.

AU - Cen, Renyue

AU - Ostriker, Jeremiah P.

N1 - Funding Information:
We are gratefulf or supportf rom NSF HPCC grant ASC93-181815G. LB and MLN were supportedin part by NASA grant NAGW-3152. RC and JPO were supportedin part by NASA grant NAGW-2448 and NSF

PY - 1995/8/2

Y1 - 1995/8/2

N2 - 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.

AB - 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.

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U2 - 10.1016/0010-4655(94)00191-4

DO - 10.1016/0010-4655(94)00191-4

M3 - Article

AN - SCOPUS:0029633049

VL - 89

SP - 149

EP - 168

JO - Computer Physics Communications

JF - Computer Physics Communications

SN - 0010-4655

IS - 1-3

ER -