Nakamura M, Sawada T
Akita University, Japan.
J Biomech Eng. 1988 May;110(2):137-43. doi: 10.1115/1.3108418.
The laminar steady flow of non-Newtonian fluid (biviscosity fluid) through an axisymmetric stenosis is calculated using the finite element methods. The flow pattern, the separation and reattachment points, and the distributions of pressure and shear stress at the wall are obtained. Then, the axial force acting on the stenosis is evaluated. It is suggested by the authors that this force can become one of the causes of post-stenotic dilatation. Calculated results show that the non-Newtonian property of blood weakens the distortion of flow pattern, pressure and shear stress at the wall associated with the stenosis and that the non-Newtonian property of blood decreases the axial force acting on the stenosis.
使用有限元方法计算非牛顿流体（双粘性流体）通过轴对称狭窄处的层流稳定流动。得到了流动模式、分离和再附着点以及壁面处压力和剪应力的分布。然后，评估作用在狭窄处的轴向力。作者认为该力可能成为狭窄后扩张的原因之一。计算结果表明，血液的非牛顿特性减弱了与狭窄相关的流动模式、壁面压力和剪应力的畸变，并且血液的非牛顿特性降低了作用在狭窄处的轴向力。
