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. Author manuscript; available in PMC: 2019 Jul 11.
Published in final edited form as: J Acoust Soc Am. 2005 Jul;118(1):410–427. doi: 10.1121/1.1862251

FIG. 7.

FIG. 7

Jet instability modes. (a) Varicose (symmetric) mode, in which shear layer vorticity coalesces into vortex ring-like structures. (b) Sinuous (antisymmetric) mode, in which the shear layer vorticity coalesces into inclined vortex pair-like structures.