Flow visualization experiments in a V-shaped channel bounded by a cylindrical surface

This paper presents visualization photographs of cellular Stokes flow induced by rotation of a circular cylinder in a V-shaped channel bounded by a cylindrical surface. The source of motion that is the inner rotating cylinder is positioned at the center of the cylindrical surface, as well as at different locations inside this channel. Many interesting flow patterns have been visualized using solid tracers of magnesium illuminated by a thin sheet of light coming from a laser device. Some quantitative data have been deduced from these visualization photographs. The influence of the outer boundary on the flow structure is analyzed and a comparison is made.