Organized structures in turbulent jets can be modeled as wavepackets. These are
characterized by spatial amplification and decay, both of which are related to stability …

Extreme events in fluid flows, waves, or structures interacting with them are critical for a wide
range of areas, including reliability and design in engineering, as well as modeling risk of …

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

Informed by large-eddy simulation (LES) data and resolvent analysis of the mean flow, we
examine the structure of turbulence in jets in the subsonic, transonic and supersonic …

To investigate the effects of the nozzle-exit conditions on jet flow and sound fields, large-
eddy simulations of an isothermal Mach 0.9 jet issued from a convergent-straight nozzle are …

Four different applications of spectral proper orthogonal decomposition (SPOD) are
demonstrated on large-eddy simulation data of a turbulent jet. These are: low-rank …

The purpose of this paper is to characterize and model waves that are observed within the
potential core of subsonic jets and relate them to previously observed tones in the near …

Coherent features of a turbulent Mach 0.9, Reynolds number jet are educed from a high-
fidelity large eddy simulation. Besides the well-known Kelvin–Helmholtz instabilities of the …

Response modes computed via linear resolvent analysis of a turbulent mean-flow field have
been shown to qualitatively capture characteristics of the observed turbulent coherent …

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 …