Effect of vibration on two-liquid system in rotating cylinder

Kozlov, Nikolai; Шувалова, Д. А.

doi:10.1016/j.actaastro.2016.04.038

Cited by 6 publications

(3 citation statements)

References 15 publications

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“…Both effects result in surface oscillations relative to the container, and this leads to the generation of steady streaming in the centrifuged layer [4][5][6]. In the case when the two phases are immiscible liquids of different densities, these two effects persist but the dynamics becomes more complex because new parameters come into play, such as ratios of densities and of viscosities [7,8]. The centrifuged liquid-liquid interface possesses a rich spectrum of oscillations [9].…”

Section: Introductionmentioning

confidence: 99%

“…The centrifuged liquid-liquid interface possesses a rich spectrum of oscillations [9]. When the cylindrical container makes translational (longitudinal or transversal) vibrations as a whole, the centrifugal waves or quasi-steady relief are excited on the interface [7,10]. The external action perpendicular to the rotation axis generates the differential rotation of the interface [7,8].…”

Section: Introductionmentioning

confidence: 99%

“…When the cylindrical container makes translational (longitudinal or transversal) vibrations as a whole, the centrifugal waves or quasi-steady relief are excited on the interface [7,10]. The external action perpendicular to the rotation axis generates the differential rotation of the interface [7,8]. In the general case, in a non-rotating system, theory predicts that the steady streaming near liquid-liquid interface is characterized by a discontinuity of the tangential velocity and shear stress [11,12].…”

Section: Introductionmentioning

confidence: 99%

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Dynamics of a Rotating Core-Annular Flow at Inertial Fluid Oscillations

Vlasova¹,

Karpunin²,

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2023

Proceedings of the 10th International Conference on Fluid Flow, Heat and Mass Transfer (FFHMT 2023)

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Dynamics of a centrifuged system of two immiscible liquids in a rotating cylinder is studied experimentally. In experiments, the liquids fill a horizontal cylindrical container with transparent walls that rotates about its axis. The study is carried out in the case of fast rotation when under the action of the centrifugal force the light liquid forms an axi-symmetric column on the container axis (core), while the heavy liquid is distributed along the cylindrical wall (annulus). The gravity makes the core shift radially by a small distance, which is practically invariant along the axis. This effect excites the tangential oscillations of the interface leading to the generation of azimuthal steady flows in the rotating frame of reference and to the differential rotation of the interface. The profile of azimuthal velocity has a "discontiunity", which appears on the limits of a viscous boundary layer formed at the interface. The maximum velocity is observed in the outer liquid near the interface. The analysis of the velocity profiles reveals that the liquid-liquid interface is the essential generator of the azimuthal flow in the annulus, while the Ekman pumping appears to affect the flow velocity inside the core. The results of the study may be helpful for the determination of the distribution of inclusions or species on the rotating interface.

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