University of California, Santa Barbara

CIRF Seminar on "Advection and Deformation in 2D Weak Turbulence"

Wednesday, May 11 | 4:00 PM - 5:00 PM
ESB 2001

Speaker:  Nicholas T. Ouellette, Assistant Professor of Mechanical Engineering, Yale University

Title:  Advection and Deformation in 2D Weak Turbulence

Abstract:    In strongly nonlinear flow fields, material volumes are not only advected by the flow but also tend to be strongly deformed as time progresses. This advection-driven deformation enhances mixing both by steepening
gradients of passive scalar fields and by increasing the size of material surfaces relative to material volumes. I will present recent experimental work aimed at understanding the dynamics of shape changes of material areas in a quasi-two-dimensional weakly turbulent laboratory flow. I will focus on the shape distortion of Lagrangian triangles, minimal parameterizations of material areas, and on the spatial distribution of strongly nonlinear deformation.

Host:  Prof. Eckart Meiburg

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