LIQSEDFLOW: 水中堆積物重力流れに果たす二相系物理の役割 The LIQSEDFLOW: Role of two-phase physics in subaqueous sediment gravity flows

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Author(s)

Abstract

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.

Journal

  • Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering)

    Journal of Japan Society of Civil Engineers, Ser. B2 (Coastal Engineering) 65(1), 536-540, 2009

    Japan Society of Civil Engineers

Codes

  • NII Article ID (NAID)
    130004956340
  • NII NACSIS-CAT ID (NCID)
    AN10369955
  • Text Lang
    ENG
  • ISSN
    1884-2399
  • NDL Article ID
    11237011
  • NDL Source Classification
    ZN1(科学技術--建設工学・建設業)
  • NDL Call No.
    Z43-1894
  • Data Source
    NDL  J-STAGE 
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