Kelvin-Helmholtz vortices

The role of large vortices, is the secondary insertion of heated products and air into the rich fuel flow, was revealed in [16]. The flame zone is extended along the outer edge of the Kelvin-Helmholtz vortex train. The flame base moves upward with the vortex connected to it, after that the flame base jumps down to the next vortex [16]. 

The term flicker describes relatively periodic oscillations of the summit of the flame. These oscillations stem from the differences in velocity between the external jet of fresh oxidant and the hotter external jet containing burned gases, which gives rise to shear instability similar to the Kelvin-Helmholtz instability and to vortex streets. The same phenomenon occurs under the influence of gravity alone [BUG 86]. 

Moore grapples with the vortex theory of atoms elaborated by Helmholtz and Kelvin, and the more recent electronic theory of atoms propounded by... 

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