摘要
综合介绍了一种新的纯（Ｌａｇｒａｎｇｉａｎ方法———光滑质点流体动力学（ＳＰＨ）方法，由于它计算空间导数时不需要使用网格，从而避免了高维拉氏差分网格法中的网格缠结和扭曲的麻烦，它对非对称的和内含真空区域的三维问题特别有效。重点介绍了该方法的理论基础，流体动力学方程组的推导，人为粘性和热传导，自引力、汇和磁场，光滑核的选取。
This paper describes a new and pure Lagrangian method called 'Smoothed Particle Hydrodyna mics' (SPH) method. The method is to actually evaluate spatial gradients without the use of any grid. Thus it does not suffer form the severe problems always associated with mesh tangling and distortion. Therefore it can be applied to multidimensional hydrodynamics which could effectively model three dimensional systems which lack symmetry and possess large voids. At first, the paper gives an introduction to theoretical basis to SPH. Emphasis is given to a proper derivation of the SPH equations from the hydrodynamical conservation equations. Discussion covers some rela tive problems such as artifical viscosity, thermal conduction, self gravity and sink and magnetic fields, choosing the smoothing kernels, and implementation of SPH code, etc.
出处
《计算物理》
CSCD
北大核心
1996年第4期385-397,共13页
Chinese Journal of Computational Physics
