Transitional plane Couette flow: an alternative to the low dimensional dynamical systems approach

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• Manneville, P (Ecole Polytechnique)
• Tuesday 09 September 2008, 12:10-12:30
• Seminar Room 1, Newton Institute.

If you have a question about this talk, please contact Mustapha Amrani.

The Nature of High Reynolds Number Turbulence

The transition from the turbulent state to the laminar regime in plane Couette flow is studied by means of a model focusing on the in-plane (x,z) space dependence of a few velocity amplitudes with reduced wall-normal (y) dependence. The model appears well suited to study the low-R transitional range. I shall present my latest results obtained at very large aspect ratio (typically 768×768 with gap rescaled to 1) and attempt to convince people that the statistical physics of spatiotemporal chaos in extended geometry offers a valuable alternative to the well-accepted interpretation of the relaxation of turbulence in terms of chaotic transients typical of low-dimensional dynamical systems.

This talk is part of the Isaac Newton Institute Seminar Series series.

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