幂律流体绕流楔形物体时的层流边界层  

The Laminar Boundary Layer of Power Law Fluids along Wedge Formed Bodies

作　　者：程林[1,2] 刘存芳[1,2] 周强泰[1,2] 张梦珠[1,2] 

机构地区：[1]东南大学动力工程系 [2]山东工业大学动力系

出　　处：《东南大学学报（自然科学版）》1997年第1期87-91,共5页Journal of Southeast University：Natural Science Edition

摘　　要：从流体力学和非牛顿流体力学的基本方程出发，在未作任何假设的情况下，通过引入合理的相似变量，得出了幂律流体绕流楔形物体时的层流边界层常微分方程及其数值解，该常微分方程及其解在塑性指数ｎ＝１时，与经典流体力学中的方程及解完全相同．讨论了塑性指数ｎ及物体形状指数ｍ对无因次速度分布的影响，给出了边界层内的速度分布。Based on basic equations of fluid mechanics and non Newtonian fluid mechanics, this paper is concerned with the numerical solutions of laminar boundary layer equations of power law fluids along wedge formed bodies by means of new dimensionless variables without making any assumption. The introduced dimensionless variables, the derived differential equations and the numerical results are exactly in the same form as those given in classical Newtonian fluid mechanics when n =1. The effects of n and m on the dimensionless velocity distribution are discussed. The expressions of velocity in the boundary layer, the boundary layer thicknesses and the drag force in the boundary layer are derived.

关 键 词：非牛顿流体 层流边界层 绕楔流动 幂律流体 

分 类 号：O373[理学—流体力学]