Yusaku Nagata, Akihiro Kawakita and Ryuji Takaki*
Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588, Japan
*E-mail address: takaki@cc.tuat.ac.jp
(Received November 5, 2002; Accepted December 3, 2002)
Keywords: Liquid-Particle System, Eddy Motion, Fluidization, External Oscillation, Right-Left Asymmetry
Abstract. Large scale collective motions of a liquid-particle system filled in a thin container were observed in the case where the container was given a horizontal vibration. Two kinds of particles with different diameters were used, and both densities of which were slightly larger than the liquid density. The particles showed large scale eddy motions with the size of the container, and the senses of rotation were almost determined by the position of the vibrator. When the vibrator was fixed at the right (left) side, the particles moved anti-clockwise (clockwise). Discussion is given on the mechanism of sustaining eddy motion and the choice of sense of rotation.