Fluid flow behind a cylinder as seen in a laboratory tank. First diagram:
A von Karman vortex street produced by a cylindrical obstacle. Second
diagram: A second cylinder is added to the experiment. Its radius R is
one tenth of the radius of the main cylinder, and it is positioned a distance
R behind the main cylinder and offset from the axis of the flow by the
same distance R. Eddy shedding is completely suppressed. In both
diagrams the cylinder is on the left; the diagrams start at a distance
16 R behind the cylinder and finish at about 100 R.
After Strykowski and Sreenivasan (1990).
© 1996 M. Tomczak
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