Showing papers by "Stavros Tavoularis published in 1993"
01 Jan 1993
TL;DR: In the wake of a thin ribbon, inserted parallel to and slightly inclined with respect to a uniformly sheared flow, both in a straight and in curved ducts, two main effects can be distinguished in the near wake: a reduction of the energy of the relatively large, free stream turbulent eddies, produced by the uniform shear, and the production of turbulence by the velocity deficit in the wake, mainly at much smaller length scales.
Abstract: Extensive measurements of turbulence have been taken in the wake of a thin ribbon, inserted parallel to and slightly inclined with respect to a uniformly sheared flow, both in a straight and in curved ducts. Two main effects can be distinguished in the near wake: a reduction of the energy of the relatively large, “free stream” turbulent eddies, produced by the uniform shear, and the production of turbulence by the velocity deficit in the wake, mainly at much smaller length scales. The main direct effect of curvature was to shift the wake towards the centre of curvature. The main effect of positive inclination of the ribbon was to displace the mean streamlines towards the low velocity side.