Impact of rotation change on the emptying of an ideal bottle of water - CEA - Commissariat à l’énergie atomique et aux énergies alternatives
Journal Articles Physical Review Fluids Year : 2024

Impact of rotation change on the emptying of an ideal bottle of water

A. Caquas

Abstract

We are carrying out the experimental study of the emptying of a hermetically sealed cylindrical tank in a rotating frame. We determine the optimal rotational velocity for the tank, which minimizes the emptying time. Moreover, there exists a critical rotation velocity at which the emptying time exceeds that of the nonrotating case, depending on the relative duration of each of the three emptying regimes identified in this flow, namely, (i) a bubble regime, (ii) a vortical air jet regime, and (iii) a bathtub vortex regime. The three regimes, easily distinguished by the shape of the air-water interface, have different draining velocities. The lifetime of each regime, as well as the transitions between them, depend on both the water level and the rotating velocity of the platform.
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Dates and versions

cea-04841424 , version 1 (16-12-2024)

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Cite

A. Caquas, Luc Pastur, A. Genty. Impact of rotation change on the emptying of an ideal bottle of water. Physical Review Fluids, 2024, 9 (6), pp.064701. ⟨10.1103/PhysRevFluids.9.064701⟩. ⟨cea-04841424⟩
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