Multiparticle collision simulations of dense stellar systems and plasmas
| Autor: | P. Di Cintio, M. Pasquato, L. Barbieri, H. Bufferand, L. Casetti, G. Ciraolo, U. N. di Carlo, P. Ghendrih, J. P. Gunn, S. Gupta, H. Kim, S. Lepri, R. Livi, A. Simon-Petit, A. A. Trani, S.-J. Yoon |
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| Rok vydání: | 2022 |
| Předmět: | |
| DOI: | 10.48550/arxiv.2201.04586 |
| Popis: | 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-called Multi-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 $N^2$ 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. Comment: 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 |
| Databáze: | OpenAIRE |
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