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Vibrational Diver

Abstract : The paper is concerned with dynamics of light solid in cavity with liquid subjected to rotational vibration in the external force field. New vibrational phenomenon – diving of a light cylinder to the cavity bottom is found. The experimental investigation of a horizontal annulus with a partition has shown that under vibration a light body situated in the upper part of the layer is displaced in a threshold manner some distance away from the boundary. In this case the body executes symmetric tangential oscillations. An increase of the vibration intensity leads to a tangential displacement of the body near the external boundary. This displacement is caused by the tangential component of the vibrational lift force, which appears as soon as the oscillations lose symmetry. In this case the trajectory of the body oscillatory motion has the form of a loop. The tangential lift force makes stable the position of the body on the inclined section of the layer and even in its lower part. A theoretical interpretation has been proposed, which explains stabilization of a quasi-equilibrium state of a light body near the cavity bottom in the framework of vibrational hydromechanics.
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Submitted on : Friday, December 4, 2015 - 2:55:09 PM
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Victor Kozlov, Alevtina Ivanova, Vitalii Schipitsyn, Moncef Stambouli. Vibrational Diver. Microgravity Science and Technology, Springer, 2014, 26 (3), pp.171-178. ⟨10.1007/s12217-014-9393-x⟩. ⟨hal-01238216⟩



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