title: Frequency-selection mechanism in incompressible open-cavity flows via reflected instability waves.
abstract: 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)].
authors: Departamento de Ingeniería Mecánica, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, C1063ACV Argentina and CONICET-Consejo Nacional de Investigaciones Científicas y Técnicas, C1083ACA Argentina and Université Paris Sud 11, 91400 Orsay, France.
authors: F
authors: F
authors: Tuerke
authors: LIMSI-CNRS, 91400 Orsay, France.
authors: D
authors: D
authors: Sciamarella
authors: Université Paris Sud 11, 91400 Orsay, France and LIMSI-CNRS, 91400 Orsay, France.
authors: L R
authors: LR
authors: Pastur
authors: Université Paris Sud 11, 91400 Orsay, France and LIMSI-CNRS, 91400 Orsay, France.
authors: F
authors: F
authors: Lusseyran
authors: Departamento de Ingeniería Mecánica, Universidad de Buenos Aires, Ciudad Autónoma de Buenos Aires, C1063ACV Argentina and CONICET-Consejo Nacional de Investigaciones Científicas y Técnicas, C1083ACA Argentina.
authors: G
authors: G
authors: Artana