Dynamical Organization around Turbulent Bursts

Abstract

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.

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

Cited by in corpus (3)

• Pulses in the Zero-Spacing Limit of the GOY Model
• Temporal Structures in Shell Models
• Fixed points, stability and intermittency in a shell model for advection of passive scalars