The characteristics of the motion of solid-body markers over a settled composite vortex surface were studied using a laboratory apparatus. The vortex was generated in a cylindrical container filled with water using a rotating disc on the container bottom. The paths of solid-body markers were visualized. The radial distribution of the angular velocity of marker revolution around the container center was obtained. A relationship between eigenrotation frequencies and rotation around the container center occurred for two types of polypropylene markers (a flat square plate and a voluminous small tube).
$^1$Department of Physics, Moscow State University, Moscow, 119991, Russia
$^2$Institute for Problems in Mechanics, Russian Academy of Sciences, Moscow, 119526, Russia
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