SIMPLE aerodynamic configurations under even modest conditions can exhibit complex
flows with a wide range of temporal and spatial features. It has become common practice in …

We consider the frequency domain form of proper orthogonal decomposition (POD), called
spectral proper orthogonal decomposition (SPOD). Spectral POD is derived from a space …

Known structures and self-sustaining mechanisms of wall turbulence are reviewed and
explored in the context of the scale interactions implied by the nonlinear advective term in …

We use resolvent analysis to design active control techniques for separated flows over a
NACA 0012 airfoil. Spanwise-periodic flows over the airfoil at a chord-based Reynolds …

Resolvent analysis identifies the most responsive forcings and most receptive states of a
dynamical system, in an input–output sense, based on its governing equations. Interest in …

We develop a method to estimate space–time flow statistics from a limited set of known data.
While previous work has focused on modelling spatial or temporal statistics independently …

Resolvent analysis is a powerful tool that can reveal the linear amplification mechanisms
between the forcing inputs and the response outputs about a base flow. These mechanisms …

We propose the first least-order Galerkin model of an incompressible flow undergoing two
successive supercritical bifurcations of Hopf and pitchfork type. A key enabler is a mean-field …

Eigenspectra and pseudospectra of the mean-linearized Navier-Stokes operator are used to
characterize amplification mechanisms in laminar and turbulent flows in which linear …

Through triglobal resolvent analysis, we reveal the effects of wing tip and sweep angle on
laminar separated wakes over swept wings. For the present study, we consider wings with …