3D NUMERICAL PREDICTION FOR FLOOD FLOWS INTO RESIDENTIAL AREA WITH TETRAHEDRON SUB-CELL METHOD

• USHIJIMA Satoru

  京都大学大学院

• MAKINO Osashi

  京都大学 工学部

• NEZU Iehisa

  京都大学大学院

Bibliographic Information

Other Title

• 四面体サブセル法を用いる市街地に流入する氾濫流の3次元数値計算

Abstract

A computational method has been proposed to predict the flooded flows entering residential areas due to levee breaks and tsunamis. The focus is placed on the local free-surface flow whose momentum is so large that some buildings may be destroyed. The computational method is based on 3D MICS, a computational method for incompressible multiphase fields. In order to deal with complicated-shaped buildings in the areas, a tetrahedron sub-cell method has been newly introduced in 3D MICS. The arbitrarily-shaped bodies are represented as the assembly of multiple tetrahedron elements and their volumetric fraction in 3D computational cell is evaluated by the sub-cell method. A numerical model for the actual urban area near a river was set up and the artificial flooded flows were demonstrated with the present method.

Journal

• PROCEEDINGS OF HYDRAULIC ENGINEERING

  PROCEEDINGS OF HYDRAULIC ENGINEERING 51 787-792, 2007

  Japan Society of Civil Engineers

Keywords

• 3D MICS
• tetrahedron element
• sub-cell method
• urban flood
• tsunami

Details

• CRID: 1390001205170575104
• NII Article ID: 10021137867
• NII Book ID: AA1045915X
• DOI: 10.2208/prohe.51.787
• ISSN: 18849172
• ISSN: 09167374
• Data Source:
  • JaLC
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed