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"Nonlinear Dynamics of Fluid and Structural Systems"

Start: 4/28/2014 at 11:00AM
End: 4/28/2014 at 12:00PM
Location: Engineering Dean's Board Room, Room 258, FItzpatrick Hall
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"Nonlinear Dynamics of Fluid and Structural Systems"

Fluid and structural systems and their possible interactions have a rich array of behavior being susceptible to instabilities and, thus, the generation of limit cycle oscillations and, on occasion, chaotic response. In this talk, Dowell will touch on several examples, including solar sails, high-performance aircraft, and aerodynamic decelerators from space into planetary atmospheres.

Much of the talk will be devoted to the large and small scale oscillations that may appear in fluid flows and, thus, excite structural motion. The large scale motions include buffeting in aircraft and non-synchronous vibration in jet engines — the classic case being the Von Karman vortex street. The small scale motions have as their most well-known example the transition from laminar to turbulent flow. In all of the above cases, a combination of theory,computation, and experiment is used to understand the nonlinear dynamics of such systems.