二元硬球系统的物态方程及偏超额化学势  

EQUATION OF STATE AND PARTIAL EXCESS CHEMICAL POTENTIAL FOR BINARY HARDSPHERE SYSTEM

作　　者：徐先锋[1] 储浚[1] 任兰亭[1] 

机构地区：[1]石油大学应用物理系,山东东营257061

出　　处：《石油大学学报（自然科学版）》2001年第6期114-116,共3页Journal of the University of Petroleum,China(Edition of Natural Science)

摘　　要：利用三阶集团展开方法 ,求出二元系统配分函数的表达式。由配分函数求出二元系统的物态方程和偏超额化学势。结果表明 ,当系统堆垛分数在 0 .0 5～ 0 .2 5时 ,得到的物态方程与计算机模拟结果基本一致 ,优于二阶集团展开及PY近似的结果。当溶质粒子的直径远小于溶剂粒子的直径时 。The expression of partial function for Hard sphere system is obtained by using higher term virial expansion method. Then the equation of state and partial excess chemical potential for binary system is developed. When the volume fraction changes from 0.05 to 0.25, the result of the state equation approaches the result from computer simulation and is better than those from lower term virial expansion and P Y approximation. When the diameters of solute particals are smaller than those of solvent particals, the partial excess chemical potential is almost in agreement with the result from BMCSL method.

关 键 词：二元硬球系统 集团展开 物态方程 偏超额化学势 

分 类 号：O642[理学—物理化学]