Allied Journal of Environmental Earth Sciences

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Allied Journal of Environmental Earth Sciences 44 7897 074717

Vortex Breakdown More Research Articles

Vortex breakdown happens sometimes in vortex filaments such as trailing vortices. this phenomenon as a sudden and forceful alteration of structure which sometimes occurs in a swirling flow. Even after three decades of research, however, the physical mechanism that leads to vortex breakdown is not well understood. Vortex breakdown occurs in two distinct types of axisymmetric type and spiral type. In the first type of break-down, there is a rapid expansion of the core-forming a bubble-like construction that is almost axisymmetric. In the second type, the vortex center line deforms into a spiral without any appreciable growth in core size. An essential feature of vortex breakdown is that the axial flow, which is necessary for the breakdown, decelerates along the vortex axis. In particular, the overall direction of axial flow is normally reversed inside the bubble.

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