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
SN - 0010-4655
VL - 89
SP - 149
EP - 168
JO - Computer Physics Communications
JF - Computer Physics Communications
IS - 1-3
ER -