Abstract
Free surface movement of water in a rotating, laterally oscillating cylindrical container was qualitatively investigated. Time-dependent dynamic pressure was measured instead of free surface displacement. The swirling direction was determined by forcing the frequency and rotating direction of the cylindrical container. The swirling direction was opposite to that of the rotating cylindrical container when the forcing frequency was low, whereas the crest of the free surface swirled in the same direction as that of the rotating cylindrical container when the forcing frequency greatly increased. Unstable swirling occurred when swirling direction changes, but it disappeared as the rotating frequency increased.
Highlights
Sloshing is when liquids with a free surface oscillate in a container
We present the swirling phenomena of the cylindrical container before we indicate experimental results
We provide experimental results for CW rotation after this because the transition of the pressure changes hardly depends on the rotational direction of the cylindrical container, as shown in Figs. 6 and 7
Summary
Sloshing is when liquids with a free surface oscillate in a container. It is caused by disturbances in a partially filled liquid container. Sloshing in axisymmetric containers occurs when surface waves rotate around the center axis of a container [1]. This phenomenon is called “swirling.” This is a cause of concern for containers with large capacities, such as liquid fuel tanks in rockets and missiles, since they contain a large amount of liquid propellant. Fluid dynamic behavior in spinning tanks is related to the stability and control of rockets and spacecraft. Yam et al [3] considered the stability of a spinning axisymmetric rocket
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