Experiments on ice-sphere flows along an inclined chute

K. Nishimura, K. Kosugi, M. Nakagawa

研究成果: Chapter in Book/Report/Conference proceedingChapter

抄録

Inclined chute experiments with ice spheres were carried out in a cold laboratory to investigate the snow avalanche dynamics. The chute was 5.4 m long and 0.08 m wide. The chute inclination angles were varied from 30° to 40° and the temperature were varied from 0 to −30 °. The motion of ice spheres were recorded with the high speed video system and the velocity and density profiles were obtained under various conditions. Two types of bed conditions were selected to investigate how flowing particles interact with the bed. One was intended to simulate a rough boundary condition by placing ice spheres on the bed surface. Another was to simulate a smoother boundary by placing sand papers. A velocity gradient with a blunt shape and a significant amount of slip were found in all conditions. The slip velocity increased with chute inclinations and temperatures. Low density regions were observed near the bed, typically in the order of four to five particle diameter thick, where there existed large velocity fluctuations. Boundary conditions have a significant influence on the flow behavior; flows on the rough bed condition seem to be more agitated near the bed and travel slower in general.

本文言語英語
ホスト出版物のタイトルStudies in Applied Mechanics
ページ123-129
ページ数7
C
DOI
出版ステータス出版済み - 1 1 1992
外部発表はい

出版物シリーズ

名前Studies in Applied Mechanics
番号C
31
ISSN(印刷版)0922-5382

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials

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