Velocity distributions and fluctuations in a Taylor vortex flow.

Wave speeds in wavy Taylor-vortex flow

The speed of travelling azimuthal waves on Taylor vortices in a circular Couette system (with the inner cylinder rotating and the outer cylinder at rest) has been determined in laboratory experiments conducted as a function of Reynolds number R, radius ratio of the cylinders 7, average axial wavelength h , number of waves m, and the aspect ratio r (the ratio of the fluid height to the gap betwe...

Pattern Formation in a Simple Fluid System: Taylor-vortex Flow

Development of Narrow-band Velocity Fluctuations in Vortex Flows

1 The velocity field in the vicinity of the twin-tails of combat aircraft at high angle of attack exhibits smallamplitude fluctuations which are nearly periodic. Their frequency increases in direct proportion to freestream velocity, and inversely with model size, the relationship holding over a wide range of Reynolds number. The Strouhal number and spectral shape vary with angle of attack and w...

Velocity field for Taylor–Couette flow with an axial flow

The flow in the gap between an inner rotating cylinder concentric with an outer stationary cylinder with an imposed pressure-driven axial flow was studied experimentally using particle image velocimetry ~PIV! in a meridional plane of the annulus. The radius ratio was h50.83 and the aspect ratio was G547. Velocity vector fields for nonwavy toroidal and helical vortices show the axial flow windin...

Vortex velocity probability distributions in phase-ordering kinetics.

The calculation of the point vortex velocity probability distribution function (VVPDF) is extended to a larger class of systems beyond the nonconserved time-dependent Ginzburg-Landau (TDGL) model treated earlier. The range is extended to include certain anisotropic models and the conserved order parameter case. The VVPDF still satisfies scaling with large velocity tails as for the nonconserved ...