Abstract
The visualization and tracking of the vortices shed from a pitching panel is studied to develop a better method of identifying and tracking coherent structures in unsteady flows. The research processes a large amount of data from the 2D simulation of a flat plate undergoing a 45 pitch-up maneuver. The Eulerian Γ1 and Q functions, as well as Lagrangian coherent structures (LCS) analysis are applied at the center and boundary of the vortices. The multiple vortices forming and shedding from the plate are visualized well by their vortex centers and boundaries. The saddle points and vortex centers are tracked, which could time the vortex separation and shedding more precisely. The research reveals the rich vortex information and dynamics details available by combining methods.
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