Matched experiments and numerical simulations of flow-induced oscillations in uniform and tapered-stiffness collapsible tubes

可被压平的柔性管道在体内广泛存在，可以限制流量。限制通常与自发振荡（反复打开和关闭）有关。有许多可能的解释，但没有一个被证明与给定的实验相对应。通过对该耦合系统（流体流动与管形相互作用）的计算机模型和匹配实验，我们首次试图证明给定的理论/计算机模型包含控制给定观测到的振荡的物理。该解决方案将应用于其他工程中的柔性结构设计问题，也可能应用于医学。

Flexible tubes that can be flattened are widespread in the body and can act to limit flow-rate. Limitation is usually associated with spontaneous oscillation (repetitive opening and closing). There are many candidate explanations, but none has been shown to correspond with a given experiment. Through computer models and matched experiments on this coupled system (the fluid flow interacts with the tube shape), we seek to demonstrate for the first time that a given theory/computer model encompasses the physics controlling a given observed oscillation. The solution will find application in other flexible-structure design problems in engineering, and also potentially in medicine.