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 …

Turbulent jet noise is a controversial fluid mechanical puzzle that has amused and
bewildered researchers for more than half a century. Whereas numerical simulations are …

This is a personal statement on the present state of understanding of coherent structures, in
particular their spatial details and dynamical significance. The characteristic measures of …

The occurrence and characteristics of vortices in flows are explored comprehensively,
including historical observations and representations dated several millenia BC. Attention is …

This paper summarizes experimental studies of incompressible elliptic jets of different
aspect ratios and initial conditions, and effects of excitations at selected frequencies and …

The effect of periodic two-dimensional excitation on the development of a turbulent mixing
region was studied experimentally. Controlled oscillations of variable ampli-tude and …

Localized arc filament plasma actuators are used to control an axisymmetric Mach 1.3
ideally expanded jet of 2.54 cm exit diameter and a Reynolds number based on the nozzle …

Previous work has shown that aspects of the evolution of large-scale structures, particularly
in forced and transitional mixing layers and jets, can be described by linear and nonlinear …

The interaction of solid particles with the temporal features of a turbulent flow has direct
relevance to problems in particle and spray combustion and the processing of particulate …

The effects of vortex generators and periodic excitation on vorticity dynamics and the
phenomenon of axis switching in a free asymmetric jet are studied experimentally. Most of …