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Vortex stripping and the generation of high vorticity gradients in two-dimensional flows


We study the stripping of vortices with monotonic vorticity profiles within adverse shear. It is shown that distributed vortices behave differently from uniform patches regarding the critical onset of tearing. Stripping erodes the exterior layers of a distributed profile and generates very high vorticity gradients at the edge of the vortex. These effects are measured, and a theory which allows a detailed quantification of the mechanism is presented.

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Legras, B., Dritschel, D. Vortex stripping and the generation of high vorticity gradients in two-dimensional flows. Appl. Sci. Res. 51, 445–455 (1993).

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Key words

  • vortex dynamics
  • coherent structures
  • two-dimensional turbulence