Abstract
The plane nonlinear initial boundary value problem about the separated flow past a plate set in motion at a constant velocity from the state of rest has been considered. Results of a numerical experiment which have allowed us to trace in detail the vortex-wake formation process behind a vertical plate are reported. It is shown that, after the beginning of the plate motion, several stable vortical structures, including a Karman street, form in succession behind the plate. It is found that, on the emergence of the Karman street, there occurs a sharp and substantial growth of vortex-wake intensity and hydrodynamic drag force with a pulsating time behavior. A conclusion about the origination, in this regime, of self-sustained oscillations of the liquid in the vicinity of the plate is drawn.
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Gorelov, D.N., Govorova, A.I. Formation of vortex wakes at flow separation from plate. Thermophys. Aeromech. 24, 361–368 (2017). https://doi.org/10.1134/S0869864317030052
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DOI: https://doi.org/10.1134/S0869864317030052