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Transient Vortex Events in the Initial Value Problem for Turbulence
A vorticity surge event that could be a paradigm for a wide class of bursting events in turbulence is studied. The coherent mechanism is characterized by locally transverse vortex configurations that are intrinsically helical in both physical and Fourier space when there is a peak of the maximum vorticity $\ensuremath{\parallel}\ensuremath{\omega}{\ensuremath{\parallel}}_{\ensuremath{\infty}}(t)$. …