Linear stability and instability of Kelvin-Stuart cat’s eyes flows

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Liao, Shasha
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Abstract
Kelvin-Stuart vortices are classical mixing layer flows with many applications in fluid mechanics, plasma physics and planetary rings. We prove that the whole family of Kelvin-Stuart vortices is linearly stable for co-periodic perturbations, and linearly unstable for multi-periodic and modulational perturbations. This verifies a long-standing conjecture since the discovery of the Kelvin-Stuart cat's eyes flows in the 1960s.
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2022-05-03
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Dissertation
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