Statistics – Computation
Scientific paper
Aug 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985a%26a...149..135m&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 1, Aug. 1985, p. 135-143.
Statistics
Computation
304
Computational Astrophysics, Gravitational Collapse, Gravitational Fields, Many Body Problem, Molecular Clouds, Stellar Evolution, Angular Momentum, Binary Stars, Computational Grids, Interpolation, Kernel Functions, Particle Mass, Stellar Orbits
Scientific paper
A version of the particle method SPH with greatly increased efficiency is described. The increase in efficiency is due to the use of a grid both for the calculation of gravitational forces and for the determination of nearest neighbours. Sufficient accuracy is achieved on coarse grids by the use of a short range correction for the gravitational force. Storage problems are thereby eliminated. Other improvements include the use of interpolation kernels based on B-splines, the use of particles with different masses and the use of a simple efficient artificial viscosity. A wide variety of tests confirm the overall accuracy.
Lattanzio John C.
Monaghan Joseph J.
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