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DESCRIPTION:Speaker: Jean-Marc Chomaz, Laboratoire d'Hydrodynamique (LadHyX), CNRS-Ecole Polytechnique
Talk Title: The Convective Modoki: The Linear and Nonlinear Dynamics of Real Flows
Abstract: Novel and versatile numerical tolls are used to compute the stability of complex real flows as recirculation bubble, impinging jets, 2D or 3D wakes. Receptivity to perturbation, to blowing and suction, to base flow modification and nonlinear coupling between modes may be accessed by formulating the adjoint problem. Computation of the adjoint global mode show that both the lift-up mechanism associated to the transport of the base flow by the perturbation and the convective nonnormality associated to the transport of the perturbation by the base flow explain the properties of the flow. In particular, a compact wave maker region may be rigorously defined where control will be efficient and nonlinear interaction take place. Application to the nonlinear dynamics of the wake of a disk and of vortex induced vibration will be discussed.\n
More Info: Dr. G. Spedding
SEQUENCE:5
DTSTART:20101117T153000
LOCATION:SLH 100
DTSTAMP:20101117T153000
SUMMARY:AME Department Seminar
UID:EC9439B1-FF65-11D6-9973-003065F99D04
DTEND:20101117T163000
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