Abstract
The three-dimensional structure of wake flows behind 2-D bodies at moderate Reynolds numbers has been studied numerically. A theoretical model of coherent large-scale motion exhibited at laminar-turbulent transition has been proposed. It suggests that the underlying physical mechanism responsible for the formation of these structures appears to be a subharmonic resonant interaction of vorticity modes having a different symmetry. The preliminary results reported provide evidence that the hypothesis allows one to explain certain very important features of the evolution of coherent structures, such as three-dimensionality of the vorticity field, the presence of the odd and even modes of organized motion and the lack of universal self-similarity of the wake flows.
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© 1994 Springer-Verlag, Berlin Heidelberg
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Likhachev, O.A. (1994). Coherent Vortical Structures in Plane Far Wakes at Moderate Reynolds Numbers. In: Lin, S.P., Phillips, W.R.C., Valentine, D.T. (eds) Nonlinear Instability of Nonparallel Flows. International Union of Theoretical and Applied Mechanics. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-85084-4_29
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DOI: https://doi.org/10.1007/978-3-642-85084-4_29
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