Abstract
Viscous fluid flow near an oscillating deformable boundary of a cylindrical container is studied experimentally. The container is fixed horizontally, filled with a fluid and hermetically closed. On the top of the cylindrical boundary, a longitudinal activator is fixed, transmitting the vibrations from a linear motor to the boundary. The latter vibrates as a whole along its length, with an exception of short regions near the end faces. Under vibrations, in the Stokes boundary layers on the inner boundary surface, the steady streaming is generated. In the fluid, a system of rolls, extended parallel to the activator and mirror-symmetric with respect to the vibration axis, is formed. Their position is linked to the coordinates of boundary oscillation nodes. The flows are localized near the activator. The dynamics of the primary and the secondary steady flows is compared. The obtained results are important for the description of the flows in multiphase systems with an interface or in closed containers with an elastic boundary.
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The authors are grateful to Professor V. G. Kozlov for fruitful discussions.
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This article belongs to the Topical Collection: Multiphase Fluid Dynamics in Microgravity
Guest Editors: Tatyana P. Lyubimova, Jian-Fu Zhao
The research was supported by the Russian Science Foundation (project 17-71-10189).
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Kozlov, N., Vjatkin, A., Schipitsyn, V. et al. Steady Flows Excited by Local Oscillations of Flexible Boundary of a Container with Fluid. Microgravity Sci. Technol. 31, 821–831 (2019). https://doi.org/10.1007/s12217-019-09719-5
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DOI: https://doi.org/10.1007/s12217-019-09719-5