二维明渠双层均匀层流的纵向离散分析解

Analytical Solution of Longitudinal Dispersion in Double Falling Film on a Wall

本文分析了在重力作用下双层互不混掺的层流的流速分布和浓度偏离规律及其示踪质纵向离散的特征。推广了Taylor对扩散方程的简化处理,运用Taylor的分析给出了浓度偏离函数的具体形式和每层纵向离散系数的精确公式。在验证了公式的唯一正确性后,绘制了计算离散系数的图和表格。

In this paper, the velocity distributions, concentration deviations from the mean, and dispersion characteristics of two immiscible liquid films on the wall under the influence of gravity are studied. A one-dimensional simplified convective diffusion equation is derived from Taylor's analysis. This paper gives particular forms of concentration function and precise formulae of longitudinal dispersion coefficient which are verified.