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.
Multiparticle collision simulations of dense stellar systems and plasmas / 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. - STAMPA. - 16:(2023), pp. 134-140. (Intervento presentato al convegno Predictive Power of Computational Astrophysics as a Discovery Tool) [10.1017/s174392132200117x].
Multiparticle collision simulations of dense stellar systems and plasmas
L. Barbieri;L. Casetti;R. Livi;A. Simon-Petit;
2023
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-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.File | Dimensione | Formato | |
---|---|---|---|
S174392132200117X.pdf
Accesso chiuso
Tipologia:
Pdf editoriale (Version of record)
Licenza:
Tutti i diritti riservati
Dimensione
340.96 kB
Formato
Adobe PDF
|
340.96 kB | Adobe PDF | Richiedi una copia |
I documenti in FLORE sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.