Instability of a two-step Rankine vortex in a reduced gravity QG model

Abstract : We investigate the stability of a steplike Rankine vortex in a one-active-layer, reduced gravity, quasi-geostrophic model. After calculating the linear stability with a normal mode analysis, the singular modes are determined as a function of the vortex shape to investigate short-time stability. Finally we determine the position of the critical layer and show its influence when it lies inside the vortex.
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Contributor : Denis Roura <>
Submitted on : Monday, November 17, 2014 - 8:55:29 PM
Last modification on : Wednesday, May 15, 2019 - 3:51:59 AM

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Xavier Perrot, Xavier J. Carton. Instability of a two-step Rankine vortex in a reduced gravity QG model. Fluid Dynamics Research, IOP Publishing, 2014, 46 (3), pp.031417. ⟨10.1088/0169-5983/46/3/031417⟩. ⟨hal-01083758⟩

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