Fundamental study on the terrain effects of mount-hiji on damages caused by the atomic bomb dropped in Hiroshima

Toshio Koizumi, Hiroyuku Takeishi, Kiyonobu Ohtani, Kazuyoshi Takayama

Research output: Contribution to journalArticlepeer-review

Abstract

At the event of the atomic bomb dropped in Hiroshima, Danbara district which is located behind Mount Hiji approximately 2.3 km distant from the center of explosion, suffered less damages than surrounding districts. This phenomenon is expressed by the word called as "shade of Mount Hiji" in Hiroshima. In this research, a basic experiment to verify the topographic effects of Mount Hiji on the shock wave of the atomic bomb was carried out. In this basic experiment, by using the shadowgraph method, behaviors of the shock wave passing a topographical model of isosceles triangle and Mount Hiji model. Pressure measurement behind the model was also conducted in the experiment. As a result of the experiment, basic information on the phenomenon in which the shock wave was shielded by Mount Hiji and did not reach much to Danbara district was obtained.

Original languageEnglish
Pages (from-to)39-50
Number of pages12
JournalJournal of Wind Engineering
Volume36
Issue number3
DOIs
Publication statusPublished - 2011 Jul

Keywords

  • Atomic bomb
  • Damages
  • Hiroshima
  • Mount Hiji
  • Optical visualization
  • Shock wave
  • Terrain effects

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

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