Modelling with Transparent Soils

Iskander, Magued

doi:10.1007/978-3-642-02501-3

Cited by 65 publications

(7 citation statements)

References 41 publications

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Section: Transparent Soilmentioning

confidence: 99%

“…Transparent soils consist of solid clear grains mixed with a liquid of the same refractive index (Iskander, 2010). Due to their high transparency and granular nature, transparent soils support the study of complex engineering problems such as multiphase flow, pile penetration, failure of shallow foundations, and tunneling (Gill & Lehane, 2001;Iskander, 2010;Liu & Iskander, 2010). Transparent porous media coupled with planar laser-induced fluorescence and digital image correlation can provide 3-D information on fluid invasion topology (Dalbe & Juanes, 2018;Krummel et al, 2013).…”

Section: Transparent Soilmentioning

confidence: 99%

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Grain‐Displacive Gas Migration in Fine‐Grained Sediments

Sun

Santamarina

2019

JGR Solid Earth

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Gas migration mechanisms control the release of gas from seafloor sediments. We study underlying phenomena using transparent sediments subjected to controlled effective stress; this experimental approach allows high‐resolution real‐time monitoring of gas migration through cohesionless granular materials under 3‐D boundary conditions. Observed migration patterns depend on the effective stress at the time of injection and the stress history. Gas migration transitions from pore invasive to grain displacive when the capillary pressure for air entry ΔPAE is greater than the effective stress σ′. This study focuses on grain‐displacive gas migration. The morphology of grain‐displacive gas bodies changes with depth as the sediment stiffness G increases and the effect of surface tension γ vanishes: spheroidal gas bubbles form in the near‐surface, faceted cavities further down, and eventually open‐mode fractures develop at depth. The gas injection pressure is proportional to the effective stress in grain‐displacive migration. Preloading and overconsolidation cause the rotation of principal stresses and gas‐driven openings align with the new minimum principal stress direction. Cyclic loading promotes the upward migration of gas‐filled openings, and there is mechanical memory of previous gas pathways in sediments.

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Section: Transparent Soilmentioning

confidence: 99%

Section: Transparent Soilmentioning

confidence: 99%

Grain‐Displacive Gas Migration in Fine‐Grained Sediments

Sun

Santamarina

2019

JGR Solid Earth

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“…In this study recently introduced transparent soils [20] have been employed to visualize the terminal depth of penetration into transparent soil surrogates. These materials are comprised of quartz glass combined with a refractive indexmatching liquid.…”

Section: Introductionmentioning

confidence: 99%

Terminal depth of penetration of spherical projectiles in transparent granular media

Guzmán

Iskander²,

Bless³

et al. 2014

Granular Matter

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A series of 80 penetration tests were performed to study the terminal depth of penetration into dry and saturated transparent synthetic sand. The transparent sand was made by matching the refractive index of granulated fused quartz with a pore fluid made of either sucrose or mineral oil. Tests were conducted by shooting spherical projectiles at speeds of up to 200 m/s into the transparent soil and recording the depth of penetration non-intrusively, when possible. Analysis using existing physical and empirical models was conducted to see how well these models describe the penetration event into fused quartz and to provide best fit parameters. Adjustments to published models have also been derived which result in adequate correlations to the experimental data. List of symbols eVoid ratio F Force on the projectile M Mass

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“…The TRSM is one of the synthetic transparent similar materials which is similar to natural rock-soil mass from the perspective of strength and deformation characteristics [18]. It is synthesized by two or more than two materials which have the similar refractive index (RI), thus it shows a better transparency.…”

Section: Study Of the Trsmmentioning

confidence: 99%

Discussion of Visual Technique for Seepage Experiment Based on Transparent Rock-Soil Material

Liu¹,

Wang²,

Song³

et al. 2017

TOCIEJ

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Introduction:Due to the fact that the model experiment can simulate the flow process and movement law of fluid during the seepage experiment, seepage model experiment was widely applied to study the hydraulic characteristics of rock-soil mass and transportation of ground water and pollutants. While due to the opacity of the model medium in traditional seepage experiment, the flow process, diffusion law and occurrence state of fluid can not be observed intuitively during the experiment. Method:A new technique of seepage model experiment based on transparent rock-soil material (TRSM) was introduced in this paper, combined with optical observation method, digital imaging process technology and tracer technique, so as to realize the visual observation of seepage process. Results:The advantages and disadvantages compared with the traditional experiment were analyzed and the theoretical foundation for carrying out the seepage experiment based on TRSM was established.

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Modelling with Transparent Soils

Cited by 65 publications

References 41 publications

Grain‐Displacive Gas Migration in Fine‐Grained Sediments

Grain‐Displacive Gas Migration in Fine‐Grained Sediments

Terminal depth of penetration of spherical projectiles in transparent granular media

Discussion of Visual Technique for Seepage Experiment Based on Transparent Rock-Soil Material

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