This paper considers the analysis and control of fluid flows using tools from dynamical systems and control theory. The employed tools are derived from the spectral analysis of various linear operators associated with the Navier–Stokes equations. Spectral decomposition of the linearized Navier-Stokes operator, the Koopman operator, the spatial correlation operator and the Hankel operator provid...

The foundational differences of steady and unsteady jets issued into a laminar boundary layer crossflow are considered. Jets have been used widely for flow control applications, due to their ability enhance mixing mitigate separation, but it is unclear what role jet steadiness plays in effectiveness. Here we compare experimentally (synthetic) rectangular flat-plate with varying orifice pitch sk...

It has been hypothesized that, when engulfing food mixed with inorganic particles during benthic feeding, cyprinid fish use protrusions of tissue from the palatal organ to retain the food particles while the inorganic particles are expelled from the opercular slits. In crossflow filtration, the particle suspension is pumped parallel to the filter surface as filtrate exits through the filter por...

A high-temperature turbulent jet in a cold crossflow is investigated with the help of two scale-resolving simulation approaches. This work aims at improving methodologies used to predict thermal footprint exhaust gases issuing from helicopter engines onto fuselage. Specific attention brought capability scale resolving simulations correctly reproduce flow dynamics and mixing. Mean features, quan...

This paper conducted a computational fluid dynamics study of bubbly jets (not bubble plumes due to pure gas injection) in crossflow explore the hydrodynamics that are still unknown. A three-dimensional model was developed, calibrated, and validated by coupling Euler–Euler two-fluid with unsteady Reynolds-averaged Navier–Stokes approach OpenFOAM. The results showed modeled void fraction, velocit...

Atomization of liquid fuel jets by cross-flowing air is critical to the performance of many aerospace combustors. Recent advances in numerical methods and increases in computational power have enabled the first principle, high fidelity simulation of this phenomenon. In the recent past we demonstrated for the first time such simulations that were comprehensively validated against experimental da...