Kelvin-Helmholtz instabilities in swirling jets

Details Kelvin-Helmholtz instabilities in swirling jets Kelvin-Helmholtz instabilities in swirling jets

May 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990mnras.244...35c&link_type=abstract

Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 244, May 1, 1990, p. 35-42.

Astronomy and Astrophysics

Astronomy

5

Kelvin-Helmholtz Instability, Plasma Jets, Radio Jets (Astronomy), Shear Layers, Swirling, Accretion Disks, Active Galactic Nuclei, Flow Distribution, Velocity Distribution

Scientific paper

The temporal stability of a swirling cylindrical jet of inviscid fluid is investigated. The jet is modeled by a top-hat axial velocity profile, with constant axial vorticity inside the shear discontinuity and potential flow outside. This flow field is parameterized by an axial Mach number and azimuthal Mach number defined by the sound speed and velocity at the discontinuity. Axisymmetric waves (m = 0) are weakly affected by azimuthal flow, but the growth rate is reduced at small wavenumbers. The behavior of higher harmonics depends on the helicity H = sgn(mk).

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