This paper is an introductory review of the problem of front propagation into unstable states.
Our presentation is centered around the concept of the asymptotic linear spreading velocity …

▪ Abstract The objective of this review is to critically assess the different approaches
developed in recent years to understand the dynamics of open flows such as mixing layers …

Thermoacoustic combustion instability is one of the most challenging operational issues in
several high-performance, low-emissions combustion technologies, including gas turbines …

The spatio-temporal evolution of a turbulent swirling jet undergoing vortex breakdown has
been investigated. Experiments suggest the existence of a self-excited global mode having …

The precessing vortex core (PVC) is a coherent flow structure that is often encountered in
swirling flows in gas turbine (GT) combustors. In some swirl combustors, it has been …

The objective of this article is to review some developments in the use of adjoint equations in
hydrodynamic stability theory. Adjoint-based sensitivity analysis finds both analytical and …

The stability properties of the flow past an infinitely long circular cylinder are studied in the
context of linear theory. An immersed-boundary technique is used to represent the cylinder …

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 …

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 …

A general theoretical formalism is developed to assess how base-flow modifications may
alter the stability properties of flows studied in a global approach of linear stability theory. It …