A study of pore geometry effects on anisotropy in hydraulic permeability using the lattice-Boltzmann method

Stewart, Mark; Ward, Anderson L.; Rector, David R.

doi:10.1016/j.advwatres.2005.10.012

Cited by 80 publications

(32 citation statements)

References 43 publications

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“…However, traditional soil-characterization methods provide, at best, spatially and temporally integrated parameter estimates that are inadequate for predicting flow. It is also known that any sort of linear averaging of individual fine-scale relationships to derive effective relationships, the current norm with core analysis, will produce incorrect results (Ferrand and Celia 1992;Zhang et al 2003b;Stewart et al 2006). Even if the individual fine-scale relationships could be measured directly, the scale of the typical problem is hundreds of meters, and full three-dimensional (3-D) simulations that capture multi-scale flow processes would be computationally constrained.…”

Section: Figure 12 Vertical Exposure Of a Dike At The Army Loop Roamentioning

confidence: 99%

Vadose Zone Transport Field Study: Summary Report

Ward¹,

Conrad²,

Daily³

et al. 2006

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SummaryA series of field studies were conducted at the Hanford Site, near Richland, Washington, from FY 2000 through FY 2003 at two different locations to develop data sets to test models of flow and transport in the vadose zone. The field studies were also done to investigate advanced monitoring techniques for evaluating flow-and-transport mechanisms and delineating contaminant plumes in the vadose zone at the Hanford Site. The studies were conducted as part of the Groundwater/Vadose Zone Integration Project Science and Technology Project, now known as the Remediation and Closure Science Project, managed by the Pacific Northwest National Laboratory (PNNL) and supported by the U.S. Department of Energy, Richland Operations Office. This report summarizes the key findings from the field studies and demonstrates how data collected from these studies are being used to improve conceptual models and develop numerical models of flow and transport in Hanford's vadose zone. Results from the field studies and associated analysis have appeared in more than 46 publications generated over the past 4 years. These publications include test plans and status reports in addition to numerous technical notes and papers.Two major field campaigns were performed, one at a well injection test site and a second at a clastic dike test site. Both field studies have resulted in field-scale transport parameters for Hanford conditions, which are useful for improving predictions of subsurface flow and transport at the Hanford Site. In addition, advanced geophysical methods, including high resolution electrical resistivity measurements, were successfully tested and are now being deployed at Hanford for subsurface investigations and tank retrieval detection. The most useful information gained from these studies has been a better understanding of flow and transport in the vadose zone, and this has been specifically related to the impact of small-scale stratigraphic features (e.g., sediment layering) on water flow and contaminant transport. Conceptual models have been developed that take into account the lateral spreading of water and contaminants observed in the field studies. Numerical models of unsaturated flow and transport have been revised to account for lateral spreading of subsurface contaminant plumes.The key results from these studies include: 1) Greater understanding of the complexity of plume migration in the vadose zone at Hanford. Finescale geologic heterogeneities, including grain fabric and lamination, were observed to have a strong effect on the large-scale behavior of contaminant plumes, primarily through increased lateral spreading resulting from anisotropy.2) Observations of anion exclusion in Hanford sediments. Anion exclusion is a mechanism by which negatively charged ions are repelled from the surfaces of negatively charged soil particles, thereby increasing their velocity. Thus, the travel time of ions like pertechnetate, the stable form of 99 Tc found in oxidized environments, may decrease over that of unsaturated water f...

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Section: Figure 12 Vertical Exposure Of a Dike At The Army Loop Roamentioning

confidence: 99%

Vadose Zone Transport Field Study: Summary Report

Ward¹,

Conrad²,

Daily³

et al. 2006

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“…The lattice Boltzmann method has been used in pore-scale simulations [51][52][53][54][55][56], but mostly for methodology research and rarely for flow simulations in real pore geometry in an oil reservoir. The lattice Boltzmann method develops very quickly in pore-scale simulation of porous media for its easy treatment of complex boundary.…”

Section: Lattice Boltzmann Methodsmentioning

confidence: 99%

Advances in Pore-Scale Simulation of Oil Reservoirs

Wang

et al. 2018

Energies

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Abstract:At the high water cut stage, the residual oil in a reservoir becomes complex and dispersed. Moreover, it is challenging to achieve good predictions of the movement of oil and water in a reservoir according to the macroscopic models based on the statistic parameters of this scenario. However, pore-scale simulation technology based on directly tracking the interaction among different phases can make an accurate prediction of the fluid distribution in the pore space, which is highly important in the improvement of the recovery rate. In this work, pore-scale simulation methods, including the pore network model, lattice Boltzmann method, Navier-Stokes equation-based interface tracking methods, and smoothed particle hydrodynamics, and relevant technologies are summarized. The principles, advantages, and disadvantages, as well as the degree of difficulty in the implementation are analyzed and compared. Problems in the current simulation technologies, micro sub-models, and applications in physicochemical percolation are also discussed. Finally, potential developments and prospects in this field are summarized.

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“…This work has led to the development of new constitutive theory for describing saturationdependent anisotropy for porous media (Ward et al 2006). The new theory has been incorporated into the PNNL STOMP (Subsurface Transport Over Multiple Phases) computer model and is already being used for the evaluation of remedial options for a variety of waste management areas at the Hanford Site and within the DOE complex.…”

Section: While There Is General Agreement That Pore-scale Heterogeneimentioning

confidence: 99%

Environmental Molecular Sciences Laboratory Annual Report: Fiscal Year 2006

Foster¹,

Showalter²

2007

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A study of pore geometry effects on anisotropy in hydraulic permeability using the lattice-Boltzmann method

Cited by 80 publications

References 43 publications

Vadose Zone Transport Field Study: Summary Report

Vadose Zone Transport Field Study: Summary Report

Advances in Pore-Scale Simulation of Oil Reservoirs

Environmental Molecular Sciences Laboratory Annual Report: Fiscal Year 2006

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