Kelvin twist waves in the transition to turbulence
- 31 August 1998
- journal article
- Published by Elsevier BV in European Journal of Mechanics - B/Fluids
- Vol. 17 (4), 595-604
- https://doi.org/10.1016/s0997-7546(98)80014-9
Abstract
We present evidence for Kelvin twist waves on vortex tubes in a numerical simulation of the transition to turbulence in a breaking internal gravity wave. Specifically, m = 0, m = 1, and m = 2 twist waves are found and are compared to analytic versions of the waves. The observed twist waves are of a sufficiently large amplitude to break up the vortex tubes on which they reside, with the m = 0 waves fragmenting the vortex tubes along their length and the m = 2 waves unraveling the vortex tubes into pairs of helical tubes. Under the influence of these waves, the flow evolves from an organized collection of horseshoe vortices to a disorganized collection of vortex fragments.Keywords
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