Journal Article

A cosmological hydrodynamic code based on the piecewise parabolic method

Claudio Gheller, Ornella Pantano and Lauro Moscardini

in Monthly Notices of the Royal Astronomical Society

Published on behalf of The Royal Astronomical Society

Volume 295, issue 3, pages 519-533
Published in print April 1998 | ISSN: 0035-8711
Published online April 1998 | e-ISSN: 1365-2966 | DOI:
A cosmological hydrodynamic code based on the piecewise parabolic method

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We present a hydrodynamical code for cosmological simulations which uses the piecewise parabolic method (PPM) to follow the dynamics of the gas component and an N-body particle-mesh algorithm for the evolution of the collisionless component. The gravitational interaction between the two components is regulated by the Poisson equation which is solved by a standard fast Fourier transform (FFT) procedure. In order to simulate cosmological flows we have introduced several modifications to the original PPM scheme which we describe in detail. Various tests of the code are presented including adiabatic expansion, single and multiple pancake formation and three-dimensional cosmological simulations with initial conditions based on the cold dark matter scenario.

Keywords: hydrodynamics; methods: numerical; large-scale structure of Universe

Journal Article.  0 words. 

Subjects: Astronomy and Astrophysics

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