论文标题
密集恒星系统和等离子体的多粒子碰撞模拟
Multiparticle collision simulations of dense stellar systems and plasmas
论文作者
论文摘要
我们使用新型的模拟技术（所谓的多颗粒碰撞（MPC）方法，fokker-Planck and Monte Carlo Carlo offes替代品，总结了诸如球状簇（GC）等密集的恒星系统（GC）和弱碰撞的等离子体中的碰撞动力学的一系列数值实验。 MPC与用于计算自我一致的远程字段的粒子网格方法有关，以确保粒子数量中使用$ n \ log n $的仿真时间缩放，而不是直接$ n $ body的$ n^2 $。碰撞弛豫效应是通过基于碰撞算子方法计算粒子相互作用来建模的，该方法可确保对能量和动量的严格保护，并且仅取决于颗粒速度和基于细胞的综合量。
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.
