Experiments on ice-sphere flows along an inclined chute

K. Nishimura, K. Kosugi, M. Nakagawa

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

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.

Original languageEnglish
Title of host publicationStudies in Applied Mechanics
Pages123-129
Number of pages7
EditionC
DOIs
Publication statusPublished - Jan 1 1992
Externally publishedYes

Publication series

NameStudies in Applied Mechanics
NumberC
Volume31
ISSN (Print)0922-5382

All Science Journal Classification (ASJC) codes

  • Computational Mechanics
  • Mechanics of Materials

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