Global two-dimensional stability measures of the flat plate boundary-layer flow

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Global three-dimensional optimal disturbances in the Blasius boundary-layer flow using time-steppers (2010, methodology): “These results were extended by Åkervik et al. (2008), who found that by not restricting the spanned space to include only TS modes, the optimally growing structures could exploit both the Orr and the TS wave packet mechanism and yield a substantially higher energy growth. The Orr mechanism (Orr 1907”
Input–output analysis, model reduction and control of the flat-plate boundary layer (2009, background): “(ii) The most observable structures are tilted in the upstream direction, ‘leaning’ against the shear layer, and are similar to the linear optimal disturbances computed by Åkervik et al. (2008).”
Characterization of noise amplifiers with global singular modes: the case of the leading-edge flat-plate boundary layer (2013, background): “This large gain corresponds to a pseudo-resonance since it cannot be simply explained by the presence of a particular eigenvalue in the spectrum of the linearized Navier–Stokes operator around the real frequency F = 88 [16,17].”
Dynamics and Control of Global Instabilities in Open-Flows: A Linearized Approach (2010, background): “[56] computed a set of stable global modes from which they deduced optimal perturbations.”