Abstract
The influence of rotation on the thermal vibrational convection of liquid in a horizontal plane layer is studied experimentally. The convection in the layer is excited by the vibrations of circular polarization in the horizontal plane. The research is carried out in a liquid layer heated from above, under conditions of a strong stabilizing effect of gravity. In this case, the vibrational convection is excited at a relatively high intensity of vibrations and manifests itself in the development of short-wavelength convective structures in the form of beads. It is found that the rotation has a stabilizing effect and increase the vibrational convection excitation threshold. A map of convective stability is plotted on the plane of dimensionless parameters: vibrational parameter, and dimensionless velocity of rotation, for different values of the gravitational Rayleigh number. The results are compared with the classic case of gravitational convection in a rotating layer. It is shown that, similarly to the case of gravitational convection, rotation has a stabilizing effect on vibroconvective stability; the threshold value of the vibration parameter increases with the dimensionless velocity. It is found that at large negative values of the gravitational Rayleigh number, when cellular convective structures of vibroconvective nature are characterized by large wave numbers, in the studied area of the dimensionless frequency, rotation has little effect on the wave number of spatial convective structures, but changes their shape. (Clinical trials: no any clinical trials were performed).
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This research was funded by the Russian Science Foundation (project 18-71-10053).
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Financial support was received from the Russian Science Foundation.
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All authors contributed to the study conception and design. Victor Kozlov supervised the study. Kirill Rysin performed experiments and prepared the figures. Aleksei Vjatkin elaborated the experimental setup and technique. The first draft of the manuscript was written by Victor Kozlov and Kirill Rysin and all authors commented on previous draft versions of the manuscript. All authors read and approved the final manuscript.
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This article belongs to the Topical Collection: The effect of gravity on non-equilibrium processes in fluids
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Kozlov, V., Rysin, K. & Vjatkin, A. Thermal Vibrational Convection in a Rotating Plane Layer. Microgravity Sci. Technol. 34, 62 (2022). https://doi.org/10.1007/s12217-022-09975-y
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DOI: https://doi.org/10.1007/s12217-022-09975-y