Luo X Y, Kuang Z B
Department of Engineering Mechanics, Xi'an Jiaotong University, Shaanxi, People's Republic of China.
J Biomech Eng. 1992 Nov;114(4):512-4. doi: 10.1115/1.2894103.
A non-Newtonian constitutive equation for blood has been introduced in this paper. Using this equation, blood flow attributes such as velocity profiles, flowrate, pressure gradient, and wall shear stress in both straight and stenotic (constricted) tubes have been examined. Results showed that compared with Newtonian flow at the same flowrate, the non-Newtonian normally features larger pressure gradient, higher wall shear stress, and different velocity profile, especially in stenotic tube. In addition, the non-Newtonian stenotic flow appears to be more stable than Newtonian flow.
本文引入了一种血液的非牛顿本构方程。利用该方程，研究了直管和狭窄（收缩）管中血流的属性，如速度分布、流量、压力梯度和壁面剪应力。结果表明，与相同流量下的牛顿流体流动相比，非牛顿流体通常具有更大的压力梯度、更高的壁面剪应力和不同的速度分布，特别是在狭窄管中。此外，非牛顿流体的狭窄流动似乎比牛顿流体流动更稳定。
