Critical Velocity for the Collapse of a Cavity Region in a Granular Material and Its Size Dependence
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概要
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An experiment on the collapse of a two-dimensional macroscopic cavity region in a granular material due to a viscous flow was performed. The cavity was destroyed above a certain magnitude of fluid velocity depending on the hardness of the granular assembly and was filled with the fluidized granular material. For a given granular material, the rate of cavity filling was measured under various flow magnitudes, and the critical velocity $U_{\text{c}}$, above which the collapse of cavity occurs, was determined. The dependence of $U_{\text{c}}$ on the cavity size $D$ was obtained.
- 2009-08-15
著者
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Sano Osamu
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588
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Sano Osamu
Department Mining and Mineral Engineering
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Koizumi Shin
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588
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Shirahashi Yukio
Department of Applied Physics, Tokyo University of Agriculture and Technology, Koganei, Tokyo 184-8588
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