Abstract The averaged lift force acting on a solid in viscous liquid in case of translational or rotary vibrations of a cavity is experimentally investigated. Experiments are performed with a heavy cylinder; different types of vibrations, translational and rotational, are investigated. It is found that the vibrations excite the mean lift force which could provide the suspension of solid even in gravity field. The repulsion lift force acts on the body near the walls of the vibrating cavity. It is caused by the viscous hydrodynamic interaction of oscillating body with the wall and is significant at a distance comparable with the thickness of Stokes layer. The intensification of vibration results in the excitation of tangential lift force, which is caused by the brake of the symmetry of the body's oscillations with respect to the cavity wall. In case of rotary vibrations the lift force of high intensity manifests itself in the bulk of the cavity due to the interaction of body with the oscillating shear flow. The mean dynamics of the solid body in a cavity under the rotary vibrations is determined by the combined action of two averaged vibrational effects—levitation of the body in the oscillating shear flow and hydrodynamic interaction of the body with the wall. In case of translational vibrations the dynamics of the solid is mainly determined by interaction with the walls. The experiments demonstrate that the vibrations have strong mean effect on the bodies in liquid; they could be used for efficient control of solid inclusions in microgravity and must be taken into account in space experiments and technologies.

    Highlights ► The behavior of solid in liquid under vibrations of different type is experimentally studied. ► Novel vibrational effects are found out which could be useful for planning microgravity experiments. ► In weightlessness the lift forces described in the paper could play essential role. ► The vibrational lift force acting on the body strongly depends on the type of vibration. ► Vibration is an efficient tool for multiphase systems control in microgravity.


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    Titel :

    Lift force acting on the cylinder in viscous liquid under vibration


    Beteiligte:
    Kozlov, V. (Autor:in) / Ivanova, A. (Autor:in) / Schipitsyn, V. (Autor:in) / Stambouli, M. (Autor:in)

    Erschienen in:

    Acta Astronautica ; 79 ; 44-51


    Erscheinungsdatum :

    2012-04-08


    Format / Umfang :

    8 pages




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch





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