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Drainage and filling in cylindrical and rectangular containers

Abstract Drainage and filling processes in cylindrical and rectangular containers for several motion sequences are experimentally studied using a stereo videogrammetric technique. The measured quantities include the rigid body motion of the containers and the water level relative to the body coordinate system as a function of time. The experimental data are used to validate Torricelli's law and determine the time constant, discharge coefficient, and water volume. In addition, the air funnel shapes in vortical sinks in a stationary cylinder are measured, and the effects of the initial water height and swirling on the drainage are addressed.