Experimental investigation of the wake behind a rotating sphere
Fluid Dynamics
2018-01-31 v1
Abstract
The wake behind a sphere, rotating about an axis aligned with the streamwise direction, has been experimentally investigated in a low-velocity water tunnel using LIF visualizations and PIV measurements. The measurements focused on the evolution of the flow regimes that appear depending on two control parameters, namely the Reynolds number and the dimensionless rotation or swirl rate , which is the ratio of the maximum azimuthal velocity of the body to the free stream velocity. In the present investigation, we cover the range of smaller than 400 and from 0 and 4. Different wakes regimes such as an axisymmetric flow, a low helical state and a high helical mode are represented in the (, ) parameter plane.
Cite
@article{arxiv.1712.04895,
title = {Experimental investigation of the wake behind a rotating sphere},
author = {Maciej Skarysz and Jacek Rokicki and Sophie Goujon-Durand and Jose Eduardo Wesfreid},
journal= {arXiv preprint arXiv:1712.04895},
year = {2018}
}