Dynamical Organization around Turbulent Bursts

Details Dynamical Organization around Turbulent Bursts Dynamical Organization around Turbulent Bursts

1997-10-06

arxiv.org/abs/chao-dyn/9710002v1

Physics

Condensed Matter

4 pages, REVTex, 3 figures in one ps-file

Scientific paper

10.1103/PhysRevE.57.6643

The detailed dynamics around intermittency bursts is investigated in turbulent shell models. We observe that the amplitude of the high wave number velocity modes vanishes before each burst, meaning that the fixed point in zero and not the Kolmogorov fixed point determines the intermittency. The phases of the field organize during the burst, and after a burst the field oscillates back to the laminar level. We explain this behavior from the variations in the values of the dissipation and the advection around the zero fixed point.

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