Cho Y I, Back L H, Crawford D W
J Biomech Eng. 1985 Aug;107(3):257-67. doi: 10.1115/1.3138551.
An experimental investigation was carried out to acquire an understanding of local pressure changes and flow along the main lumen of arterial branch models similar to the femoral artery of man with three different branch angles (30, 60, and 90 deg) and side branch to the main lumen diameter ratio of 0.4. Effects of branch to main lumen flow rate ratios and physiological Reynolds numbers were found to be significant on the local pressure changes, while that of branch angle was also found to be important. The flow visualization study revealed that the flow separated in the main lumen near the branch junction when the pressure rise coefficient along the main lumen was above a critical value (i.e., 0.35 - 0.46), which was observed to be a function of the Reynolds number. The critical value of the branch to main lumen flow rate ratio was found to be about 0.38 - 0.44 also depending on the Reynolds number. Time averaged pressure distributions for pulsatile flow were similar in trend to steady flow values although they differed somewhat in detail in the main lumen in the branch region.
进行了一项实验研究，以了解与人体股动脉相似的具有三种不同分支角度（30度、60度和90度）且侧支与主腔直径比为0.4的动脉分支模型主腔内的局部压力变化和血流情况。发现分支与主腔流速比和生理雷诺数对局部压力变化有显著影响，同时分支角度的影响也很重要。流动可视化研究表明，当主腔内的压力上升系数高于临界值（即0.35 - 0.46）时，主腔内靠近分支连接处会出现流动分离，观察到该临界值是雷诺数的函数。分支与主腔流速比的临界值也约为0.38 - 0.44，同样取决于雷诺数。脉动流的时间平均压力分布趋势与稳恒流值相似，尽管在分支区域主腔内的细节有所不同。
