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Title: Flow past a cylinder at a Reynolds number of 10,000 with plasma-based flow control

Description: Large-eddy simulation of flow past a circular cylinder at a Reynolds numer of 10,000 with plasma-based flow control. Deielectric-barrier-discharge plasma actuators are mounted on the top and bottom of the cylinder, extending 3 degrees in the circumferential direction. These small actuators perturb the highly unstable shear layers, causing them to roll up into strongly coherent vortices which are shed and convected downstream. These vortices bring high momentum fluid from the outer flow into the wake, thereby precluding the formation of larger vortical structures, and mitigating large amplitude unsteady forces. The video shows vorticity magnitude contours which are colored by streamwise velocity. The solution was obtained with a sixth-order accurate numerical method using 34 million grid points.

Credits: Donald P. Rizzetta and Miguel R. Visbal

References: Rizzetta, D. P. and Visbal, M. R. (2008) "Large-Eddy Simualtion of Plasma-Based Control Strategies for Bluff Body Flows," AIAA Paper 2008-4197.

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Contributed By: Donald P. Rizzetta

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