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Journal Article

Instability mechanisms and transition scenarios of spiral turbulence in Taylor-Couette flow

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Avila,  Marc
Max Planck Research Group Complex Dynamics and Turbulence, Max Planck Institute for Dynamics and Self-Organization, Max Planck Society;

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Citation

Meseguer, A., Mellibovsky, F., Avila, M., & Marques, F. (n.d.). Instability mechanisms and transition scenarios of spiral turbulence in Taylor-Couette flow. Physical Review E, 80: 046315.


Cite as: https://hdl.handle.net/11858/00-001M-0000-0029-17DF-3
Abstract
Alternating laminar and turbulent helical bands appearing in shear flows between counterrotating cylinders are accurately computed and the near-wall instability phenomena responsible for their generation identified. The computations show that this intermittent regime can only exist within large domains and that its spiral coherence is not dictated by endwall boundary conditions. A supercritical transition route, consisting of a progressive helical alignment of localized turbulent spots, is carefully studied. Subcritical routes disconnected from secondary laminar flows have also been identified.