【摘要】 本文研究溶质在作圆管和渠道层流的偶应力流体中弥散时的化学反应效应。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a,η和化学反应率参数λ对上述量的影响。最后,我们指出作圆管层流的偶应力流体的公式与微极流体相应公式间的密切联系。更多还原

【Abstract】 In this paper, we have investigated the dispersion of a soluble matter in couple-stress fluids flowing through pipes and channels by taking into account the effects of homogeneous chemical reaction. The analytical expressions of the relative concentration distribution C and the effective diffusion coefficient D* are devived under Taylor’s simplified assumptions, and the numerical computation is carried out. The effects of couple-stress parameters a, η and chemical reaction rate constant λ on those quantities above are discussed. Further, we have pointed out these formulas of couple-stress fluid in close relationship with one of micropolar fluid in a circular tube.更多还原