Flow behavior and residual saturation formation of liquid carbon tetrachloride in unsaturated heterogeneous porous media

Oostrom, Mart; Hofstee, C.; Lenhard, R. J.; Wietsma, Thomas

doi:10.1016/s0169-7722(02)00107-9

Cited by 54 publications

(41 citation statements)

References 26 publications

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“…While these studies have only explored the individual effect of flow velocity on DNAPL migration, some studies have explored the effect of heterogeneity on DNAPL migration (Oostrom et al 2003;Gerhard and Kueper 2003;Díaz et al 2006;Page et al 2007;Lee et al 2007;Yoon et al 2008). Dekker and Abriola (2000a, b) performed two-phase flow and surfactant-enhanced remediation simulations and found that mean, variance, and vertical correlation of random permeability fields were primarily important in determining organic liquid saturation, which also had significant effects on remediation efficiency.…”

Section: Introductionmentioning

confidence: 99%

Influence of flow velocity and spatial heterogeneity on DNAPL migration in porous media: insights from laboratory experiments and numerical modelling

et al. 2015

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Understanding the migration of dense non-aqueous phase liquids (DNAPLs) in complex subsurface systems is important for evaluating contamination source zones and designing remediation schemes after spill events. Six sandbox experiments were performed to explore the individual effect of flow velocity, and the combined effect of flow velocity and layered lenses on a DNAPL (PCE) migration in porous media. DNAPL saturation was measured using a light transmission system, and saturation distribution was quantified by spatial moments. The experimental results show that large flow velocity significantly promotes lateral and vertical migration of the low-viscosity DNAPL, while when layered lenses exist, the infiltration rate decreases and horizontal spread increases. Migration processes were numerically simulated, and the modelling results tested against experimental results. Furthermore, migration of DNAPLs with different viscosities was simulated to explore the combined effects of flow velocity and geological heterogeneity. Simulation results show that enhanced heterogeneity makes low-viscosity DNAPLs migrate along preferential pathways, resulting in irregular DNAPL morphology. Layered lenses combined with heterogeneity complicate the effect of flow velocity on the migration of low-viscosity DNAPLs by changing percolation paths. Results also demonstrate that flow velocity exhibits relatively little influence on the migration of medium/high-viscosity DNAPLs, which is predominantly controlled by viscosity and heterogeneity. Enhanced heterogeneity has a larger effect on migration behavior. Findings indicate that the migration paths and position of the source zone could change significantly, due to the combined effect of groundwater flow velocity and geological heterogeneity; thus, comprehensive hydrogeological investigation is needed to characterize the source zone.

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Section: Introductionmentioning

confidence: 99%

Influence of flow velocity and spatial heterogeneity on DNAPL migration in porous media: insights from laboratory experiments and numerical modelling

et al. 2015

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“…Oostrom et al 10) と同じ結論に達している．このように， NAPLの残留飽和度の必要性をかなり以前より確認しながら，多くの水-空気-NAPL3相流解析では残留飽和度を考慮してこなかった．著者らが調べた範囲内では，前記のOostrom et al 水-空気 1.000 …”

Section: ずに水-空気-Napl3相流解析を行っているが，unclassified

Estimation of Effects on Napl Residual Saturation for Airwater-Napl Phase Flow in Porous Media

義彦¹,

周佑²,

秋博³

2010

JSCE JOURNAL OF GEOTECHNICAL AND GEOENVIRONMENTAL ENGINEERING

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“…Laboratory and field research has shown that significant amounts of solvents can be entrapped in low permeability zones by capillary forces and removal by SVE can be severely limited due to low flow rates, mass transfer resistance of the hydrophobic compounds by trapped interparticle water, and diffusion resistance (Smith et al, 1996;Fisher et al, 1998;Yang et al, 1999;Oostrom et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Enhanced Voc Removal With Soil Fracturing in the SRS Upland Unit

Riha¹

2005

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Flow behavior and residual saturation formation of liquid carbon tetrachloride in unsaturated heterogeneous porous media

Cited by 54 publications

References 26 publications

Influence of flow velocity and spatial heterogeneity on DNAPL migration in porous media: insights from laboratory experiments and numerical modelling

Influence of flow velocity and spatial heterogeneity on DNAPL migration in porous media: insights from laboratory experiments and numerical modelling

Estimation of Effects on Napl Residual Saturation for Airwater-Napl Phase Flow in Porous Media

Evaluation of Enhanced Voc Removal With Soil Fracturing in the SRS Upland Unit

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