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Published on: July 19, 2016
Evolution of a Vortex in a Strain Flow
N C Hurst1, J R Danielson1, D H E Dubin1
1Physics Department, University of California, San Diego, La Jolla California 92093, USA.
Abstract:
Experiments and vortex-in-cell simulations are used to study an initially axisymmetric, spatially distributed vortex subject to an externally imposed strain flow. The experiments use a magnetized pure electron plasma to model an inviscid two-dimensional fluid. The results are compared to a theory assuming an elliptical region of constant vorticity. For relatively flat vorticity profiles, the dynamics and stability threshold are in close quantitative agreement with the theory. Physics beyond the constant-vorticity model, such as vortex stripping, is investigated by studying the behavior of nonflat vorticity profiles.
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