A study on drifting motion of pipe driven by flow through the pipe

Abstract

The possibility to derive the capillary tube to bladder via urethra by employing only pressure gradient-based flow in the capillary has been studied through analysis of Stokes flow in double pipe system with sliding inner pipe. It was found that the sliding movement of the capillary towards the bladder could be maintained for an intermediate radii ratio 0.2–0.5 of the system.