Hybrid multi-scale model for partially saturated media based on a pore network approach and lattice Boltzmann method

Montellà, Eduard Puig; Yuan, Chi; Gens, Antonio

doi:10.1016/j.advwatres.2020.103709

Cited by 15 publications

(16 citation statements)

References 73 publications

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“…When water content increases, the progressive coalescence of all bridges results in a continuous liquid phase and the material is said to be in the funicular regime [5]. This regime remains challenging to be modeled numerically at the sample scale: in DEM, only the pendular regime has been implemented [8,9], and the Lattice Boltzmann Method, that can essentially model any capillary regime, is computationally expensive [10][11][12]: for instance, modeling of water drainage in a 40-grains packing takes more than 100 days. Funicular regime is mostly studied experimentally, for example in triaxial tests in Bishop et al [13] and in shear tests in Cuomo et al [14].…”

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Numerical analysis of capillary bridges and coalescence in a triplet of spheres

et al. 2021

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The behavior of a natural soil is known to change substantially in presence of water under unsaturated conditions, due to additional capillary forces.Water can be absorbed by hygroscopic soil particles (such as clay), or remains at the surface of solid grains (sand, silt) and forms either a discontinuous (pendular regime) or a continuous phase (funicular regime), depending on the water content of the soil. Capillary bridges exist solely between pairs of grains at small water contents, giving rise to simple capillary force expressions and straightforward subsequent modeling. For larger water contents, these generic capillary bridges

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confidence: 99%

“…However, more complex assemblies are difficult to handle directly through the Laplace-Young equation because of the lack of symmetry and advanced numerical methods are needed [10][11][12].…”

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confidence: 99%

Numerical analysis of capillary bridges and coalescence in a triplet of spheres

et al. 2021

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“…Pore-network models require less computational power than the fully resolved grid-based techniques. On the top of that, PN is computationally also cheaper than the particle-based approaches (Montellá et al, 2020). Therefore, PN is commonly used in several fields of engineering (Ambekar, 2021).…”

Section: Network Modeling Methodsmentioning

confidence: 99%

A Comprehensive Review of the Simulation Methods for Analysis at the Pore-scale

Szűcs

Vehovszky²,

Sanders³

2023

Period. Polytech. Transp. Eng.

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Fluid flow through porous material is relevant in different fields of engineering, such as in engine and vehicle development, and can be supported through CFD simulation. Numerical simulations at the pore-scale can be used to replace or reduce expensive laboratory measurements. These methods offer a valuable opportunity to connect the pore-scale properties of the porous material with displacement processes on the continuum-scale. Furthermore, they allow researchers to specify crucial flow properties, e.g., capillary pressure, which are crucial for REV-scale research. Three main methods, direct numerical, pore network modeling, and hybrid approaches, are widely used in order to analyze the pore-scale mechanics of fluid flow behavior through porous materials with CFD simulations. The present comprehensive review demonstrates and highlights the significant advantages, disadvantages, and critical challenges in the pore-scale fluid flow simulations. The main challenges include the characterization of material properties, and up-scaling process from pore to continuum or field-scale.

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“…This method can well characterize the heterogeneity of microscale throat, but it is not enough to describe it only with a single permeability parameter. In 2020, Zhao [115,116], Si [117], Eduard [118], and others developed a variety of pore network models to describe the geometric shapes of several real pore throats, analyzed the simplified LBM simulation process of complex pore throat, and proposed a characterization method with high precision and low cost. For porous media with three-dimensional complex geometry, Yingda [119] proposed a deep learning technique based on convolutional neural networks (CNNs), which can accurately estimate the steady-state velocity field (multiple directions) of porous media, and extended the model to the calculation of macroscale permeability.…”

Section: Macroscale Imbibition Mechanisms After Hydraulic Fracturingmentioning

confidence: 99%

Frontier Enhanced Oil Recovery (EOR) Research on the Application of Imbibition Techniques in High-Pressure Forced Soaking of Hydraulically Fractured Shale Oil Reservoirs

Guo

et al. 2021

Geofluids

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Shale reservoirs are characterized by low porosity and low permeability, and volume fracturing of horizontal wells is a key technology for the benefits development of shale oil resources. The results from laboratory and field tests show that the backflow rate of fracturing fluid is less than 50%, and the storage amount of fracturing fluid after large-scale hydraulic fracturing is positively correlated with the output of single well. The recovery of crude oil is greatly improved by means of shut-in and imbibition, therefore attracting increasing attention from researchers. In this review, we summarize the recent advances in the migration mechanisms and stimulation mechanisms of horizontal well high pressure forced soaking technology in the reservoirs. However, due to the diversity of shale mineral composition and the complexity of crude oil composition, the stimulation mechanism and effect of this technology are not clear in shale reservoir. Therefore, the mechanism of enhanced oil recovery by imbibition and the movable lower limit of imbibition cannot be characterized quantitatively. It is necessary to solve fragmentation research in the full-period fluid transport mechanisms in the follow-up research.

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Hybrid multi-scale model for partially saturated media based on a pore network approach and lattice Boltzmann method

Cited by 15 publications

References 73 publications

Numerical analysis of capillary bridges and coalescence in a triplet of spheres

Numerical analysis of capillary bridges and coalescence in a triplet of spheres

A Comprehensive Review of the Simulation Methods for Analysis at the Pore-scale

Frontier Enhanced Oil Recovery (EOR) Research on the Application of Imbibition Techniques in High-Pressure Forced Soaking of Hydraulically Fractured Shale Oil Reservoirs

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