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Mechanical Engineering Thursday Seminar Series, 530.803
Thursday, November 12, 2009
This week's seminar has been cancelled.
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Graduate Seminar in Fluid Mechanics, 530.807
Friday, November 13, 2009
3:00pm, 120 Latrobe Hall
“Toward Simple Boundary Condition Representations of Zero-Net Mass-Flux Actuators in Grazing Flow”
Presented by
Ehsan Aram
Zero-net mass-flux (ZNMF) or synthetic jet actuators are versatile devices with numerous applications including active control of flow separation, mixing enhancement, heat transfer, and thrust vectoring of jets. The scales of the actuator are in general 10-2 – 10-4 times smaller in size compared to the dominant length scale of the problem. Thus, conducting numerical flow simulations which include full representations of the actuator cavity is an extremely daunting proposition. We have explored a set of simple boundary conditions that can represent the flow emanating from actuator in grazing flow. Results from numerical simulations are used to determine the key characteristics of the jet profile, and these are used to construct a series of boundary condition models. These various boundary conditions are then tested for a jet exhausting in an attached boundary layer as well as a boundary layer with an induced separation bubble.
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