Turbulent-laminar patterns

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• Laurette Tuckerman, ESPCI Paris
• Friday 02 February 2024, 16:00-17:00
• MR2.

If you have a question about this talk, please contact Professor Grae Worster.

Experiments and numerical simulations have shown that turbulence in transitional wall-bounded shear flows such as plane Couette and Poiseuille flow frequently takes the form of long oblique bands, if the domains are sufficiently large to accommodate them. At their upper Reynolds-number threshold, laminar regions carve out gaps in otherwise uniform turbulence, thereby forming regular oblique turbulent-laminar patterns with a large spatial wavelength. At the lower threshold, isolated turbulent bands sparsely populate otherwise laminar domains and complete laminarization takes place via their disappearance characterized by the 2D directed percolation scenario.

This talk is part of the Fluid Mechanics (DAMTP) series.

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