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

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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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