分叉血管有绕流物血液流分析

用粘性流动边界元方法,研究了一类对称分叉血管中有绕流物时血液流问题.对血液在分叉血管内的流动规律,及血管内积存颗粒状绕流物的问题作了研究,给出了颗粒状绕流物处于不同位置时血液流场,及颗粒状绕流物表面的压力分布.计算中将粘性流体在区域上的求解问题化为边界上的求解问题,使问题的求解降低一个维度,由于内点值与边界值分开计算只在边界上作了近似因而精度较高,可为生物流的数值计算提供一种可靠方法.

Analysis on Bifurcation Arterial Flow Around a Body

In this paper,the blood hydrokinetic characteristics in the bifurcation blood vessel have been studied with the viscosity fluid boundary element methods.Besides the movement laws of the bloodstream in the branch tube,the changes of the blood flow have been studied when there is flow-round particle in the blood vessel.And some situations are indicted,such as the velocity vector distribution of the blood flow,the pressure distribution on the surface of the flow-round particle.The results show that the particle unsteadies at the main axis.It can move towards the high speed direction when it deviates due to some disturbances.The conclusion is consistent with the test result of the literature.The method of the paper turns the problem of handling about viscous flow from the area into the boundary so as to lower one dimension in calculation.It is very flexible and convenient to divide solving inner point value from the boundary.It needs less EMS memory,but with great accuracy.It provides a worthy approach for numerical calculation of bio-fluid engineering and other correlation domains.