§3.1 宇宙学流体动力学模拟
引力是驱动结构形成的基本力，因此大多数宇宙学模拟的核心构建模块便是 $N$ 体程序（关于替代方法的讨论，参见[1] ）。$N$ 体程序的目标是研究自引力、无碰撞系统的非线性动力学演化（综述见[2] ,[3] ）。Being gravity the force that drives structure formation, the building block of the majority of cosmological simulations is an N-body code (see e.g. [1] for a discussion on alternative approaches). The goal of an N-body code is to investigate the non-linear dynamical evolution of a self-gravitating, collisionless system (see [2] ,[3] , for reviews). ...