沙堆分离分层中新现象的计算机模拟  

Computer Simulation of New Phenomena of Segregation and Stratification in Sandpiles Modle

作　　者：巩龙 童培庆[1] 

机构地区：[1]南京师范大学物理科学与技术学院,南京210097

出　　处：《南京师大学报（自然科学版）》2001年第4期47-52,共6页Journal of Nanjing Normal University(Natural Science Edition)

基　　金：江苏省教育厅高校科研项目 (0 0KJB140 0 0 4)

摘　　要：研究了由大小不同的两种粒子形成二维沙堆时的粒子空间分布规律 ,借助于数学沙粒模型 ,利用 4个参数 ,对 2 4种所有可能的情形进行了系统地模拟 ,得出了粒子空间分布特点 ,并据此把沙堆分成 7类 :严格分离、整体分离 (含分层 )、整体分离 (含直立 )、准周期混合 (含分离 )、分层、直立分层、直立分层 (含混合 ) .The distribution of particles in two dimensional sandpile is studied,which is made of two types of particle in different size,and the result with four parameters in the 24 situations basing on mathematical sand particle model is simulated.The relationship between distributions and parameters is obtained.Seven classes of sandpile:absolute segregation,segregation(including stratification),segregation(including vertical stratification),quasi periodic mixing(including segregation),stratification,vertical stratification,vertical stratification(including mixing) is got.The behavior of each of these classes is explained.

关 键 词：二维沙堆 分离 分层 数学沙粒模型 计算机模拟 粒子空间分布规律 动力学机制 

分 类 号：O4－39[理学—物理]