Abstract
The dynamics of a pair of parallel counter-rotating vortices has been the object of a large number of studies in the last three decades. The continued interest in this flow is,to a great extent,due to its relevance to the problem of aircraft trailing wakes. In addition,the counterrotating vortex pair represents one of the simplest flow configurations for the study of elementary vortex interactions, which can yield useful information for the understanding of the dynamics of more complex transitional and turbulent flows.
The first three-dimensional stability analysis of a vortex pair was performed by Crow [1],who showed that such a pair is unstable to perturbations which are symmetric with respect to the plane separating the vortices,and which have an axial wavelength of around eight vortex spacings. This result is in good agreement with the vortex structures observed in the contrails of real aircraft.
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Leweke, T., Williamson, C.H.K. (2000). Three-Dimensional Instabilities of a Counterrotating Vortex Pair. In: Maurel, A., Petitjeans, P. (eds) Vortex Structure and Dynamics. Lecture Notes in Physics, vol 555. Springer, Berlin, Heidelberg. https://doi.org/10.1007/3-540-44535-8_13
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DOI: https://doi.org/10.1007/3-540-44535-8_13
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