溶质在偶应力流体中的弥散及其化学反应效应

Dispersion of soluble matters in couple stress fluids and effects of chemical reactions

研究溶质在作圆管和渠道层流的偶应力流体中的弥散规律，考虑了化学反应效应．利用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，分析了偶应力参数α和化学反应率参数λ对上述量的影响．

The dispersion law of soluble matters in the couple stress fluids through a circular tube and a channel is studied and effects of chemical reactions is considered in this paper. The analytical expressions of the relative concentration distribution c and the effective diffusion cocfficient D are derived, by using Stokess couple stress fluid theory and the boundary conditions of no vorticity of particles at the wall and Taylors simplified assumption. The numerical computations are performed and the effects of couple stress parameters α and chemical reaction rate constant γ on those quantities above are discussed.