Video Motion Analysis of Cinder Models through Fall Experiment

DOI
  • Liu Meizhi
    Department of Architecture, Graduate School of Engineering, Kyoto University
  • Maruyama Takashi
    Research Division of Atmospheric and Hydrospheric Disasters, Disaster Prevention Research Institute, Kyoto University
  • Sasaki Kansuke
    Research Division of Atmospheric and Hydrospheric Disasters, Disaster Prevention Research Institute, Kyoto University
  • Inoue Minoru
    Japan Weather Association
  • Iguchi Masato
    Sakurajima Volcano Research Center, Disaster Prevention Research Institute, Kyoto University
  • Fujita Eisuke
    National Research Institute for Earth Science and Disaster Resilience

Bibliographic Information

Other Title
  • 噴石模型の落下試験の動画解析

Description

Falling properties of cinder models, non-simple shaped objects, were measured and three-dimensional falling trajectories were obtained by using video movies. Aerodynamic characteristics of cinder models were examined by the trajectory. The falling models imitated the configuration of cinders collected at the site of the experiment, Sakurajima volcano. Two types, one with sharp edges and one without sharp edges, were selected as representatives and a sphere was selected as reference model. The results showed that the drag coefficient varied with the falling velocity becoming smaller as the velocity increased. When the models fell with terminal velocity, the drag coefficients of the cinder models without and with sharp edges were about 0.5 and 0.6, respectively. The drag coefficient of the sphere model was about 0.3.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390569623319727744
  • NII Article ID
    130008043953
  • DOI
    10.14887/windengresearch.26.0_305
  • ISSN
    24355429
    24354384
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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