Chaotic self-sustaining structure embeded in turbulent-laminar interface

Abstract

An iterface structure between turbulence and laminar flow is investigated in two-dimensional channel flow. This spatially localized structure not only sustains itself, but also converts laminar state into turbulence actively. In other words, this coherent structure has a functionality to generate inhomogeneity by its inner dynamics. The dynamics of this functional coherent structure is isolated using the filtered simulation, and a physical perspective of its dynamics is summarized in a phenomenological model called an "ejection-jet" cycle, which includes multiscale interaction process.

References in corpus (2)

• Thermalization of the world's smallest fluids: recent developments
• Damping filter method for obtaining spatially localized solutions

Cited by in corpus (5)

• Bifurcations to turbulence in transitional channel flow
• The growth mechanism of turbulent bands in channel flow at low Reynolds numbers
• Intermittent direction reversals of moving spatially-localized turbulence observed in two-dimensional Kolmogorov flow
• Propagation mechanism of localized wave packet in plane-Poiseuille flow
• Pattern preservation during the decay and growth of localized wave packet in two-dimensional channel flow