Effect of variation of external pressure on the dynamics of a collapsible tube

The aim of this study is to conduct experimental investigations that replicate biological flows, including but not limited to simulating blood flow in veins, arteries, and capillaries, air flow in the bronchial airways, and urinal flow through the urethra. All biological vessels that convey fluids have a very high degree of elasticity and flexibility.The biological function of the vessel relies on the interaction between the fluid flow inside the vessel and the resulting wall deformations. Consequently, comprehending these interactions holds great significance in the realms of physiology and medicine. These systems exhibit intricate dynamics due to the two-way coupling between the fluid flow and the elastic behavior of the vessel transporting the fluid. This paper introduces a straightforward depiction of a deformable elastic tube that carries a flowing fluid and experiences both steady and unsteady external pressure. Flow through the flexible structures under steady external pressure is well-studied. This presented study will allow the externally applied pressure to analyze all the phenomena of fluid-structure interaction, and external pressure that is varying with time. The result shows that the dynamics of the collapsible structure can be controlled by the external agent like pressure wave or sound wave.