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Title:
A refined particle method for astrophysical problems
Authors:
Monaghan, J. J.; Lattanzio, J. C.
Affiliation:
AA(Max-Planck-Institut fuer Physik und Astrophysik, Garching, West Germany; Monash University, Clayton, Australia), AB(Monash University, Clayton, Australia)
Publication:
Astronomy and Astrophysics (ISSN 0004-6361), vol. 149, no. 1, Aug. 1985, p. 135-143. (A&A Homepage)
Publication Date:
08/1985
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
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
Bibliographic Code:
1985A&A...149..135M

Abstract

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.

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