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CPM Seminar
Jorge Viñals Florida State University We discuss recent developments in linear and weakly nonlinear theories of parametric surface waves (Faraday waves) in the large aspect ratio limit. Stability limits for a planar free surface have been obtained for fluids of arbitrary viscosity, and the predicted threshold values confirmed experimentally. The weakly nonlinear regime has been exhaustively explored in systems driven by one and more frequency components, revealing a wealth of intricate mechanisms and patterns of different symmetries, including stable quasi-crystalline and super-lattice patterns of standing surface waves. Progress has also been achieved on a number of other fronts including the observation of mean flow effects and spiral patterns, secondary instabilities, and the transition to spatio-temporal chaos.
Wednesday, March 29th 2000, 15:30 |