Abstract
The results of experimentally investigating the initial stage of development of shear instability of the interface between two immiscible fluids relatively oscillating during the parametric excitation of standing internal waves are presented. Three stages of distortion of the sinusoidal wave profile are distinguished: the formation of short secondary waves, their breaking, and transition to large-scale vortex formations. It is shown that in the nodal zones of a standing wave quasi-stationary wave perturbations start to develop at wave steepnesses Γ ∼ 0.08–0.13 and critical Reynolds numbers of the laminar boundary layer R ∼ 90–300. The experimental data are compared with the classical Kelvin-Helmholtz theory.
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Translated from Izvestiya Rossiiskoi Academii Nauk, Mekhanika Zhidkosti i Gaza, No. 6, 2005, pp. 140–149. Original Russian Text Copyright © 2005 by Kalinichenko.
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Kalinichenko, V.A. Development of a Shear Instability in Nodal Zones of a Standing Internal Wave. Fluid Dyn 40, 956–964 (2005). https://doi.org/10.1007/s10697-006-0010-6
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DOI: https://doi.org/10.1007/s10697-006-0010-6