An insight into the interaction between fluid and granular soil based on a resolved CFD-DEM method

Hu, Gaoyang; Zhou, Bo; Yang, Bo; Wang, Huabin; Liu, Zhenjiang

doi:10.1016/j.compgeo.2023.105722

Cited by 7 publications

(1 citation statement)

References 55 publications

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“…The CFD-DEM coupling approach typically includes unresolved, [13][14][15] semiresolved, 16 and resolved methods. 17 Given the computational scale of slurry infiltration simulations, unresolved methods are widely adopted. Yin et al 18 and Zhang et al 14 simulated slurry infiltration and identified four types of filter cake formation and find the void throat is closely related to the infiltration process.…”

Section: Introductionmentioning

confidence: 99%

Hydromechanical analysis of slurry infiltration with coupled CFD–DEM method

Cheng,

Wang,

Wang

et al. 2024

Num Anal Meth Geomechanics

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The tunnel face stability is closely related to the migration behavior and clogging mechanism of the slurry particles in granular soils, which is not yet fully understood. In this study, the coupled computational fluid dynamics–discrete element method (CFD–DEM) is adopted to investigate the infiltration behavior of slurry at the particle scale. The full Johnson–Kendall–Roberts (JKR) contact model describing interparticle behavior that accounts for cohesion present even when particles are microseparated after collisions is adopted for clay‐clay or clay‐sand particles and the Hertz–Mindlin model is used for sand‐sand particles. Through simulations, the mechanism of the slurry particle's blockage is identified as physical, frictional and cohesive modes, and slurry particle migration usually undergoes the process of aggregation‐destruction‐migration‐reassembly. Meanwhile, the influences of pressure, cohesive force, and particle shape on infiltration are also analyzed. The results indicate that high pressure lengthens the infiltration path and increases the infiltration rate. The increase in cohesion enhances the effective clogging of the sand column by the slurry, and particles with smaller sphericity are more likely to clog in the sand column. These findings may enhance our understanding of the slurry infiltration mechanism and its practical application in TBM tunneling.

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