Abstract
Experimental and theoretical study on a steady flow in largely deformed collapsible tube was performed to evaluate the feasibility of applying a static tube law to the tube under a steady flow condition. We measured a static tube law. Cross sectional shape of the tube and velocity profile across the tube at several different positions along the tube were also measured using a laser light sheet and LDV, respectively. Pressure distributions along the tube were calculated by taking into account change in a cross sectional shape of the tube and a flow separation due to a sudden expansion of the tube. It was compared with the one from a static tube law. The results showed a small difference between a transmural pressure from the tube law and the calculated one at downstream of the mostly collapsed portion of the tube.
