Three-dimensional wake transition behind an elliptic cylinder near a moving wall

Three-dimensional vortex structures in a cylinder wake

The three-dimensionality of the velocity field in the wake of a circular cylinder has excited considerable interest and debate over the past decade. Presented here are experimental results that characterize the underlying vorticity field of such wakes. Using particle image velocimetry (PIV), instantaneous velocity fields were measured and from these the vorticity of the longitudinal vortices ly...

Three-Dimensional Instabilities in the Wake of a Circular Cylinder

Mark Thompson Kerry Hourigan John Sheridan Department of Mechanical Engineering, Monash University, Clayton, Australia • The twoand three-dimensional wake structure behind a circular cylinder has been computed using a high-order spectral element technique. For the two-dimensional computations the predictions are compared with accurate experimental results and agree to within experimental uncert...

Three-dimensional instabilities of a stratified cylinder wake

Experimental Investigation of wake on an elliptic cylinder in the presence of tripping wire

In this research, the behavior and characteristics of the wake of flow in an elliptic cylinder with zero angle of attack in the presence of a tripping wire were investigated experimentally. For this purpose, the used an Aluminum cylinder with an elliptical cross section of the major and minor axis of 42.4 mm and 21.2 mm, respectively, and of the height of 390 mm. The cylinder model was examined...

Confined three-dimensional stability analysis of the cylinder wake.

A spatially confined stability analysis is reported for the cylinder wake at Reynolds numbers 190 and 260. The two three-dimensional instabilities at these Reynolds numbers are shown to be driven by the flow just behind the cylinder.