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 …

Three direct numerical simulations of incompressible turbulent plane mixing layers have
been performed. All the simulations were initialized with the same two velocity fields …

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

Many large, sand bed alluvial channels are dominated by dunes that possess low‐angle lee
sides, often< 10°, which play a critical role in the transportation of sediment and generation …

River channel confluences play a major role in the dynamics of all fluvial systems, and yet
our understanding of bed load routing at these sites is very sparse. The dynamics of …

Instabilities present in a swirling jet in the Reynolds number range from 20 000 to 60 000
and a nominal swirl number of 0.5 were studied experimentally, using smoke visualization …

Large-scale organized structures in the turbulent plane wake of a circular cylinder are
investigated in air up to a downstream distance of 40d at a Reynolds number of Red= 1.3× …

The interactions between upstream-propagating guided jet waves and shear-layer instability
waves near the nozzle of subsonic and nearly ideally expanded supersonic, isothermal free …

The flow over a cavity at a Mach number 0.8 is considered. The cavity is deep with an aspect
ratio (length over depth) L/D= 0.42. This deep cavity flow exhibits several features that …

Abstract" Order in chaos" is not an abstraction. It is a characteristic of real disordered
processes and can be formulated quantitatively. In application to turbulence the term" order …