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1999 Fiscal Year Final Research Report Summary

Development of the software for the analysis of the disaster of an earthquake using the approach of the computational fluid dynamics

Research Project

Project/Area Number 09558049
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Natural disaster science
Research InstitutionOchanomizu University

Principal Investigator

KAWARURA Tetuya  Ochanomizu University, Graduate School of Humanities and Sciences, Professor, 人間文化研究科, 教授 (40143383)

Co-Investigator(Kenkyū-buntansha) OSHIMA Yoshitaka  Maeda Kensetsu Inc., Section of Construction, chief, 土木設計部, 課長(研究職)
IWATSU Reima  Tokyo Denki University, Department of Mechanical Engineering, Associate Professor, 工学部, 助教授
SATO Hiroshi  Ochanomizu University, Graduate School of Humanities and Sciences, Professor, 人間文化研究科, 教授 (10017197)
Project Period (FY) 1997 – 1999
KeywordsEarthquake / Computer Software / Propagation of Seismic Wave / Fire Tornado / Low Mach Number Approximation / Vortex Breakdown / Free Surface / Numerical Simulation
Research Abstract

There are many investigations concerning to the disaster of an earthquake. However there are few studies which use CFD (Computational Fluid Dynamics) approach except for those of the tidal wave. In the present research, we focus on this point and try to apply CFD method. The present research consists of two parts. One is the prediction of the flow field caused by the big fire due to an earthquake and the other is analysis of the propagation of the seismic wave and make clear the mechanism of the unexpected amplification of the wave.
For the study of the flow induced by the big fire, two numerical methods are developed and verified. By using these methods, it is found that a fire tornado is actually generated by Coriolis force, moving around and finally breaks down and these processes are repeated temporary. The effect of the stratification on the formation of the tornado is also investigated. The flow visualization is also focused in this study and it is found that the volume rendering technique is suitable for analizing the results.
In general, an alluvium lays on a hard base rock. This means that it is possible to regard this propagation problem as that of the water wave in a container, i.e. it is possible to consider the alluvium as the water and the base rock as the container. By using this analogy, the propagation of the water wave on the free surface is simulated instead of the propagation of seismic waves. The water wave is produced by the deformation of a container in time. Using the methods developed in this study, the water waves in the two typical shape of the container which is similar to the Hanshin and San Francisco area are simulated and it is found that the amplitude of the wave becomes large at the special positions which are peculiar to the shape of the container due to the complex reflection and interference.

  • Research Products

    (24 results)

All Other

All Publications (24 results)

  • [Publications] 菅 牧子: "低マッハ数近似による熱対流の数値シミュレーション"日本機械学会論文集 B編. 65. 108-115 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 小紫 誠子: "Formation of a Fire Tornado and Its Breakdown"Theoretical and Applied Mechanics. 48. 349-354 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河村 哲也: "環境シミュレーションにおける2,3の課題"京都大学数理解析研究所講究録「複雑流体の数理」. 1081. 163-179 (1999)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 古屋 久美子: "Numerical simulation of the behavior of water waves in a deforming container"CFD Journal. 9-1(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩津 玲磨: "Toward the Numerical Simulation of Plows Induced by Room Fire"Journal of Physical Society of Japan. 69-4(印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 岩津 玲磨: "円筒容器内渦崩壊に自由表面と固体表面のおよぼす影響についての数値的研究"日本機械学会論文集 B編. (印刷中). (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河村 哲也: "環境科学入門"インデックス出版. 128 (1998)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 河村 哲也 他: "環境工学"インデックス出版(印刷中). 180 (2000)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] M. Kan, T. Kawamura and R. Iwatsu: "Numerical simulation of the heat convection by using the low-mach-number"50th Annual Meeting of the Division of Fluid Dynamics APS. Vol. 42, No., 11. 2277 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. KAN, T. KAWAMURA, R. IWATSU: "Numerical Simulation of Thermal Plume Solver"PREPRINTS 16th ICNMFD (International Conference on Numerical Methods in Fluid Dynamics). 265-266 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. KAWAMURA, M. KAN: "Numerical Simulation of Sand Transfer Caused by Fluid Flow"PREPRINTS 16th ICNMFD (International Conference on Numerical Methods in Fluid Dynamics). 267-268 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] K. Furuya, Y. Kawamura, H. Oka and K. Ishii: "Numerical Simulation of the behavior of water waves in a deforming container"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

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      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kawamura, T. Yasui and Y. Morohoshi: "Three dimensional numerical simulation of the flow around the rotating Savonius Rotors standing on the fixed base"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

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      「研究成果報告書概要(欧文)」より
  • [Publications] M. Kan, T. Kawamura and K. Kuwahara: "Numerical Study of the Interaction between a Pier and a Sand Surface"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Komurasaki, T. Kawamura and K. Kuwahara: "Thermal Convection in Stratified Fluid"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

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      「研究成果報告書概要(欧文)」より
  • [Publications] M. Iwagawa and T. Kawamura: "Numerical Study of the Behavior of the Smoke Emitted form the chimney"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Oda, Y. Tamura and T. Kawamura: "Numerical Study of the Blase Waves in a Closed Space"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] T. Kawamura and T. Hayashi: "Application of the DDM to the Flow around a Savonius Rotor"Book of abstracts of 12th Int. Conf. Domain Decomposition Method. 43 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] S. Komurasaki, T. Kawamura and K. Kuwahara: "Formation of a Fire Tornado and Its Breakdown"Theoretical and Applied Mechanics. Vol. 48. 331-338 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Iwanaga, T. Kawamura and S. Sirayama: "Numerical Simulation of Advection and Diffusion of the Smoke in Stratified Flow"Theoretical and Applied Mechanics. Vol. 48. 339-348 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] M. Kan, and T. Kawamura: "Numerical Formation of the Barchan Sand Dune"Theoretical and Applied Mechanics. Vol. 48. 349-354 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Iwatsu and H. S. Koyama: "Numerical study of steady axisymmetric vortex breakdown"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] Y. Ogawa and R. Iwatsu: "Numerical study of vortex breakdown in a cylindrical container with free surface"Proc. 8th International Symposium on Coputational Fluid Dynamics. (CD-ROM). (1999)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] R. Iwatsu and T. Kawamura: "Toward the Numerical Simulation of Flows Induced by Room Fire"Journal of Physical Society of Japan. Vol. 69, No. 4 (in print).

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2001-10-23  

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