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Helmholtz instability in stratified shear flows with magnetic fields
Authors:A Satya Narayanan
Institution:1. Department of Applied Mathematics, Indian Institute of Science, Bangalore, India
Abstract:The stability characteristics of a Helmholtz velocity profile in a stratified Boussinesq fluid in the presence of a rigid boundary is studied. A jump in the magnetic field is introduced at a level different from the velocity discontinuity. New unstable modes in addition to the Kelvin-Helmholtz mode are found. The wavelengths of these unstable modes are close to the wavelengths of internal Alfvén gravity waves in the atmosphere.
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