LIQSEDFLOW: 水中堆積物重力流れに果たす二相系物理の役割

• 佐々 真志

  港湾空港技術研究所

• 関口 秀雄

  京都大学

書誌事項

タイトル別名

• The LIQSEDFLOW: Role of two-phase physics in subaqueous sediment gravity flows
• LIQSEDFLOW スイチュウ タイセキブツ ジュウリョク ナガレ ニ ハタス ニソウケイ ブツリ ノ ヤクワリ

抄録

The paper describes an extension of the computational code LIQSEDFLOW proposed by the authors. The salient features of the code lie in the capabilities to describe the multi-phased physics of subaqueous sediment gravity flows. Specifically, it combines Navier-Stokes/continuity equations and equations for advection and hindered settling of grains for a liquefied soil domain, with a consolidation equation for the underlying, progressively solidifying soil domain, via a transition layer that is characterized by zero effective stress and a small yet discernable stiffness. Evolutions of the flow and solidification surfaces are traced as part of solution by using a volume-of-fluid (VOF) technique. The predicted features of gravity flows of initially fluidized sediments with different concentrations conform to the observed performances in two-dimensional flume tests. The present results demonstrate the crucial role of two-phase physics, particularly solidification, in reproducing the concurrent processes of flow stratification, deceleration, and redeposition in subaqueous sediment gravity flows.

収録刊行物

• 土木学会論文集Ｂ２（海岸工学）

  土木学会論文集Ｂ２（海岸工学） 65 (1), 536-540, 2009

  公益社団法人 土木学会

キーワード

• 水中堆積物重力流
• 二相系物理
• 凝固
• 液状化
• 数値解析コード

詳細情報

• CRID: 1390001205317083392
• NII論文ID: 130004956340
• NII書誌ID: AN10369955
• ISSN: 09167897
• ISSN: 18838944
• ISSN: 18842399
• DOI: 10.2208/kaigan.65.536
• NDL書誌ID: 11237011
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11237011
• 本文言語コード: en
• データソース種別:
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  • NDL
  • Crossref
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  • KAKEN
• 抄録ライセンスフラグ: 使用不可