Modeling the interaction between fluid flow and particle movement with discontinuous deformation analysis (DDA) method

Tomofumi Koyama, Satoshi Nishiyama, Meng Yang, Yuzo Ohnishi

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

Coupled hydro-mechanical processes in granular media represent the interaction between solid particles movement and fluid flow during external and/or internal loading. The processes attract attention in geotechnical engineering since they cause many disasters such as landslide, slope collapse, boiling/quicksand and soil liquefaction, etc. This study presents a numerical method combining discontinuous deformation analysis (DDA) for mechanical calculation and finite element method for fluid flow simulation to model the interaction between solid particles' movement and fluid flow from microscopic point of view. The term of hydraulic pressure was newly formulated and introduced to the original DDA. The simplified examples are given to verify the new method, and the computational results correlate well with the theoretical calculations, further development is also considered.

Original languageEnglish
Pages (from-to)1-20
Number of pages20
JournalInternational Journal for Numerical and Analytical Methods in Geomechanics
Volume35
Issue number1
DOIs
Publication statusPublished - Jan 1 2011
Externally publishedYes

Keywords

  • Coupled hydro-mechanical processes
  • Discontinuous deformation analysis (DDA)
  • Finite element method (FEM)
  • Granular material

ASJC Scopus subject areas

  • Computational Mechanics
  • Materials Science(all)
  • Geotechnical Engineering and Engineering Geology
  • Mechanics of Materials

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