18 research outputs found
Motion and wake structure of spherical particles
This paper presents results from a flow visualization study of the wake
structures behind solid spheres rising or falling freely in liquids under the
action of gravity. These show remarkable differences to the wake structures
observed behind spheres held fixed. The two parameters controlling the rise or
fall velocity (i.e., the Reynolds number) are the density ratio between sphere
and liquid and the Galileo number.Comment: 9 pages, 8 figures. Higher resolution on demand. To appear in
Nonlinearity January 200