测粘流动入口效应

The Entry Effect in Visconetric Flows

在文献[1]中讨论了无穷长园管测粘函数的确定,但在有限长度的园管中,测粘流动都存在着入口效应,即流体必须经过一段有限距离后,才能形成n<1非牛顿幂律流体完全发展的速度分布,而它又与n=1的牛顿流体抛物形剖面速度分布[2]是不同的。本文以物理学的方法,就常剪切率的测粘流动(非牛顿流体)讨论入口故应,升加以比较。

The visconetic flows in an infinite pipe is discussed in the reference book NO. 1 . However the flows in a limited pipe has its entry effect.By means of phylics the entry efaect in visconetric flows (non-Newtonian fluid) is discussed and compared in this paper.