Number：

04097036

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Name：

Chiu-Chin Wu

Titles：

Lecturer

Author：

Chiu-Chin Wu

Paper name：

Stripes Formations of a Granular Mixture Under Horizontal Oscillations

Name of activity：

Thirty-second session of the Society of Theoretical and Applied Mechanics of the Republic of China National Mechanics Conference

Keywords：

segregation, horizontal vibration, stripes, DEM

Abstract：

The mixing and segregation processes of binary granular mixture of particles with different properties (sizes and densities) subjected to horizontal oscillatory excitation are investigated in this study. The spatial distributions of vibrates binary mixture are visualized by experiment and DEM simulation and get good agreement .The time evolutions of pattern formations show that the stripes perpendicular to the driving direction are developed. The segregation transitions of granular mixtures are strongly dependent on the volume fractions of different species, the particles’ propeties and the vibration conditions. The mechanism of segregation processes is strongly dependent on the momentum exchange of each species. The drag forces provisds by fricion with the tray influence the segregation phenomena of the mixture. For understanding the extent of the segregation, the segregation intensity was determined to quantify the segregation rates of the mixtures. We show that the segregation rates of the mixtures increase with the sizes ratio, density ration and vibration strength.

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