非牛顿流体经波纹管流动的阻力特性

本文对Carreau流体经波纹管的蠕动流的阻力特性用差分方法作了数值求解。先施行坐标变换,提出一种保证周期性条件的混合迭代法,能较快得到问题的收敛解。流体的物质参数以及流动区域的几何参数对流动阻力特性的影响作了讨论,同时指出了直径均匀的毛管模型作为渗流模型的不足之处。

FLOW RESISTANCE OF A CARREAU FLUID THROUGH CORRUGATED TUBE

In this paper, we used finite difference method to simulate the creeping flow of a Carreau fluid through sinusoidally corrugated tube for various geometrical and ma terial parameters. The governing equations after coordinate transformation were solved. An iteration scheme was put forward to ensure the spatial periodicity .condition. The reasonably rapid convergence can be reached as compared with other iteration schemes. The influences of geometrical and rheological parameters on flow resistance were discussed, and the inade-quacy of classical capillary model with uniform radius for flow through porous media was presented.