用流动双折射法研究动脉分叉处血液流场的剪应力分布

STUDY SHEAR STRESS DISTRIBUTION OF THE BLOOD FIELDS IN ARTERIAL BRANCH MODELS USING FLOW BIREFRINGENCE METHOD

用流动双折射法，对三种动脉分叉模型所模拟的血液流场剪应力分布进行了研究，发现流场中零应力点的位置、最大剪应力沿壁面的分布及相应极值点的位置均随分流比的变化而改变，与总流量无关，且应力集中点与动脉分叉几何形状有关。

The shear stress distribution of the blood flow fields in the three simulated models of the arterial branch is studied by using flow birefringence method. It is found tat the position of zero stress, the distribution of maximum shear stress along the wall face and the corresponding position of extreme velue in the blood flow fields change with branch flow ratio, and are not related to the total flow. The point of stress concentration depend on the geometric of the arterial branch.