Force Evaluation in Particle Methods for Self-Gravitating Multi-Phase Systems

Details Force Evaluation in Particle Methods for Self-Gravitating Multi-Phase Systems Force Evaluation in Particle Methods for Self-Gravitating Multi-Phase Systems

1996-12-12

arxiv.org/abs/astro-ph/9612124v1

Astronomy and Astrophysics

Astrophysics

5 pages + 1 postscript figure; to be published in the Proceedings of the XII Italian Conference on Gen. Rel. and Grav. Phys.,

Scientific paper

A modern approach to the evolution of a mixed (stars and gas) self-gravitating system is the fully Lagrangian particle approach. The gaseous (particle) phase differs from the compact because the mutual force is given by the sum of gravity and pressure gradient. In this note we report of some characteristics, advantages and limitations of this approach for what regards the evaluation of forces in the system. In particular, a comparison between classic tree-code and fast multipole algorithm to evaluate gravitational forces is discussed.

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