Multi-level adaptive particle mesh (MLAPM): a C code for cosmological simulations
نویسندگان
چکیده
منابع مشابه
Particle-Mesh code for cosmological simulations
Particle-Mesh (PM) codes are still very useful tools for testing predictions of cosmological models in cases when extra high resolution is not very important. We release for public use a cosmological PM Nbody code. The code is very fast and simple. We provide a complete package of routines needed to set initial conditions, to run the code, and to analyze the results. The package allows you to s...
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We discuss the design and implementation of a parallel adaptive PM code, for massively parallel architectures. The code, although primarily designed for conducting gravitational simulations in a cosmological context, also includes a Smoothed Particle Hydrodynamics solver. The code is written in a combination of C, FORTRAN 77 and FORTRAN 90. The MPI-2 remote memory access standard is used for on...
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The purpose of cosmological simulations is to model the growth of structure in the universe. The techniques described here model the mass density of the universe with a distribution of softened particles. Evolution is simulated by following the trajectories of these particles under their mutual gravity. Since the region of the universe modelled is typically very much smaller than the horizon vo...
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An improved implementation of an N-body code for simulating collisionless cosmological dynamics is presented. TPM (Tree–Particle–Mesh) combines the PM method on large scales with a tree code to handle particle-particle interactions at small separations. After the global PM forces are calculated, spatially distinct regions above a given density contrast are located; the tree code calculates the ...
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We summarize the ideas that led to the Adaptive Smoothed Particle Hydrodynamics (ASPH) algorithm, with anisotropic smoothing and shock-tracking. We then identify a serious new problem for SPH simulations with shocks and radiative cooling — false cooling — and discuss a possible solution based on the shock-tracking ability of ASPH.
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2001
ISSN: 0035-8711,1365-2966
DOI: 10.1046/j.1365-8711.2001.04532.x