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Computations of the harmonically forced, unsteady viscous flow over a flexible, two‐dimensional membrane wing are presented. The aeroelastic problem is nondimensionalized and a set of six basic dimensionless parameters is derived that govern the physical problem. The computational investigation...
Capillary instability of long annular viscous liquid layers coating the surface of a cylindrical wire is studied. Effects of Reynolds number, Re, initial disturbance wave numbers, k , and wire radii, s on the growth rate of the instability are considered. The initial disturbance amplitude is...
Scattering of coherent light as it propagates parallel to a shock wave, formed in front of a bluff cylindrical body placed in a supersonic stream, is studied experimentally and numerically. Two incident optical fields are considered. First, a large diameter collimated beam is allowed to pass...
A fingering pattern forms at the interface between air and a thin layer of oil, confined between two diverging cylindrical surfaces, when one of the cylinders rotates about its axis. We present results of measurements on this pattern near its onset, and show that the onset values of both the...
The processes of the accumulation of solid heavy particles settling under gravity and modification of the carrier flow are studied analytically and numerically. The dilute limit is considered when the effects of particle–particle interactions are neglected. The flow Reynolds number is assumed...
A large‐eddy simulation has been performed of a flat‐plate boundary layer undergoing transition to turbulence under free‐stream turbulence at a level of 6%. The properties of the simulated transition match those found experimentally: not only is the position and length of transition in...
Laboratory measurements were carried out to investigate the evolution of a turbulent wake behind a right circular cylinder moving in a linearly stratified fluid. The flow field is mainly determined by the internal Froude number Fi and the Reynolds number Re, but at high Re, Fi becomes the only...
The model considered in this paper consists of an incompressible, inviscid fluid flow over bottom topography with the surface tension acting on it. A forced KdV equation with negative dispersion for capillary–gravity waves is derived with the inclusion of the effect of surface tension (for the...
A closer look at the drag curve for a circular cylinder near the onset of vortex shedding reveals that there is a sharp transition in the forces acting on a body moving through a fluid when it produces an unsteady wake. In this Letter results from high‐resolution computer simulations are...
We consider the effects of viscosity on the inviscid stability of the Batchelor J. Fluid Mech. 20 , 645 (1964) vortex in a compressible flow. The problem is tackled asymptotically, in the limit of large (streamwise and azimuthal) wavenumbers, together with large Mach numbers. This problem, with...
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