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arXiv · 1503.04551

Chaotic self-sustaining structure embeded in turbulent-laminar interface

Toshiki Teramura·Sadayoshi Toh
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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.

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Toshiki Teramura, Sadayoshi Toh. 2015-03-16. Chaotic self-sustaining structure embeded in turbulent-laminar interface. https://doi.org/10.1103/physreve.93.041101

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