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Updated: Jan 27, 2026

Magnetically Induced Rotating Rayleigh-Taylor Instability
Published on: March 3, 2017
Bathtub vortex induced by instability
Jiro Mizushima1, Kazuki Abe1, Naoto Yokoyama2
1Department of Mechanical Engineering, Doshisha University, Kyotanabe, Kyoto 610-0321, Japan.
Abstract:
The driving mechanism and the swirl direction of the bathtub vortex are investigated by the linear stability analysis of the no-vortex flow as well as numerical simulations. We find that only systems having plane symmetries with respect to vertical planes deserve research for the swirl direction. The bathtub vortex appearing in a vessel with a rectangular cross section having a drain hole at the center of the bottom is proved to be induced by instability when the flow rate exceeds a threshold. The Coriolis force is capable of determining the swirl direction to be cyclonic.
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