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Session: Control 2
Session starts: Tuesday 25 August, 15:00
Presentation starts: 16:45
Room: Room D

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Mohammad Omidyeganeh (Lecturer at City University London)
Alfredo Pinelli (Professor at City University London)

Abstract:
This work is the very first attempt to understand and optimize the configuration of flexible filaments placed on the lee side of a bluff body to manipulate flow transitions and bifurcations. It is found that the presence of a sparse set of flexible filaments on the lee side of a cylinder can interfere with the 2D-3D transition process resulting in elongation of recirculation bubble, inhibition of higher order unstable modes, and narrowing the global energy content about a particular shedding frequency. Filaments become effective when spacing between them is smaller than the dominant unstable mode at each particular Reynolds number, i.e. A and B modes.