溶质在微极流体中的弥散──考虑无偶应力边界条件

Dispersion of Soluble Matter in Micropolar Fluids──Using No-couple-Stress Boundary Condition

本文研究溶质在作圆管和渠道层流的微极流体中的弥散规律，考虑了化学反应效应。利用Ｅｒｉｎｙｅｎ的微极流体理论，无偶应力边界条件和Ｔａｙｌｏｒ简化假定，导出相对浓度分布Ｃ和等效扩散系数Ｄ＊的解析式，并作数值计算，分析了微极参数λ．ｋ０和化学反应率参数β对上述量的影响。

Taking chemical reactions into account,the dispersion of soluble matter in the micropolar fluidsthrough a circular tube or a channel is considered in this paper.Analytical expressions of the relativeconcentration distribution C and effective diffusion coefficient D are derived using Eringen's micropofar fluid theory, the no-couple-stress boundary condition and Taylor's assumption.Numerical computations are performed and the effects of the micropolar parameters λ,k0 and chemical reaction rate constant β on C and D* are then analyzed.