August 10th, 9:45 AM EDT - 10:45 AM EDT
Technical
Prof. Howard A. Stone
Lecture Title: Seeking Intersections Between Disciplines: “Boundaries” in Multiphase Flows
Abstract: Fluid mechanics has a rich history. Modern research themes introduce new questions, some of which can be understood using fundamental concepts. This feature is sometimes the case in the flows of complex fluids, which link fundamental research questions to potential applications, both in industry and for understanding natural phenomena. In this talk I will survey research questions that we have studied in recent years that have this character: (1) Although flows at modest Reynolds numbers at a T-shaped junction is a geometry where one should expect everything is known, nevertheless we uncover previously unrecognized complexity in three-dimensional solutions to the Navier-Stokes equations, which rationalize our experimental observations of particle trapping in this common flow configuration. (2) The motion of a particle adjacent to a flexible membrane links fluid and elastic responses, which we show produces interactions capable of separating particles by size. (3) We document experimentally the time and (three-dimensional) space variations of the shape of a falling thin film near an edge, and rationalize the quantitative features using a similarity scaling with a unique feature that takes a three-dimensional problem and converts it to a one-dimensional problem.
Presentations
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