关键词: 弥散系数, 扩散方程, 分布密度:分布函数, S型曲线

Abstract:

This paper deals mainly with hydrodynamic dispersion. Based on the analysis of the experiment results and the widely used formulas for calculating dispersion coefficients reported in the literatures，two improved methods are presented for determining the coefficients, The relational expression of flow rates and dispersion coefficient has also been developed for similar cores.

Key words: Dispersion coefficient, Diffusion equation, Distribution density, Distribution function, S-shaped curve