Suffusion-induced deformation and microstructural change of granular soils: a coupled CFD–DEM study

This paper presents a micro–macro investigation on suffusion in idealized gap-graded and well-graded soils using the coupled computational fluid dynamics and discrete element method

Zheng Hu; Yida Zhang; Zhongxuan Yang

2019

Scholarcy highlights

  • Behaviour of granular soils subjected to internal erosion involves complex coupling between solid–fluid interaction, skeleton deformation and microstructural evolutions
  • This paper presents a micro–macro investigation on suffusion in idealized gap-graded and well-graded soils using the coupled computational fluid dynamics and discrete element method
  • The interaction between soil particles and seepage flow is modelled via momentum exchange between two phases
  • The progressive loss of fine particles subjected to upward seepage flow at various hydraulic gradients is investigated
  • A parametric study indicates that the initial fines content and the hydraulic gradient significantly affect the kinetics of suffusion
  • In: Bonelli S Erosion in geomechanics applied to dams and levees

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