Multiparticle collision simulations of dense stellar systems and plasmas
Abstract
We summarize a series of numerical experiments of collisional dynamics in dense stellar systems such as globular clusters (GCs) and in weakly collisional plasmas using a novel simulation technique, the so-calledMulti-particle collision (MPC) method, alternative to Fokker-Planck and Monte Carlo approaches. MPC is related to particle-mesh approaches for the computation of self consistent long-range fields, ensuring that simulation time scales with N log N in the number of particles, as opposed to N2 for direct N-body. The collisional relaxation effects are modelled by computing particle interactions based on a collision operator approach that ensures rigorous conservation of energy and momenta and depends only on particles velocities and cell-based integrated quantities.
- Publication:
-
The Predictive Power of Computational Astrophysics as a Discover Tool
- Pub Date:
- January 2023
- DOI:
- 10.1017/S174392132200117X
- arXiv:
- arXiv:2201.04586
- Bibcode:
- 2023IAUS..362..134D
- Keywords:
-
- methods: n-body simulations;
- methods: numerical;
- gravitation;
- plasmas;
- Astrophysics - Astrophysics of Galaxies
- E-Print:
- 7 pages, 2 figures. To appear in the proceedings of the 362 IAU symposium "Predictive Power of Computational Astrophysics as a Discovery Tool". Chamonix, France 8-12 Nov. 2021