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Article Dans Une Revue Physical Review E : Statistical, Nonlinear, and Soft Matter Physics Année : 2015

Frequency-selection mechanism in incompressible open-cavity flows via reflected instability waves

Résumé

We present an alternative perspective on nonharmonic mode coexistence, commonly found in the shear layer spectrum of open-cavity flows. Modes obtained by a local linear stability analysis of perturbations to a two-dimensional, incompressible, and inviscid sheared flow over a cavity of finite length and depth were conditioned by a so-called coincidence condition first proposed by Kulikowskii [J. Appl. Math. Mech. 30, 180(1966)] which takes into account instability wave reflection within the cavity. The analysis yields a set of discrete, nonharmonic frequencies, which compare well with experimental results [Phys. Fluids 20, 114101 (2008); Exp. Fluids 50, 905 (2010)].
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hal-01631878 , version 1 (09-11-2017)

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  • HAL Id : hal-01631878 , version 1

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Florian Tuerke, Denisse Sciamarella, Luc Pastur, François Lusseyran, Guillermo Artana. Frequency-selection mechanism in incompressible open-cavity flows via reflected instability waves. Physical Review E : Statistical, Nonlinear, and Soft Matter Physics, 2015, 91, pp.013005-1 013005-10. ⟨hal-01631878⟩
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