A Pore Network Approach to Study Throat Size Effect on the Permeability of Reconstructed Porous Media

Kai, Xu; Cai, Jianchao; Chen, Yin; Tian, Haitao; Xu, Sai; Cai, Jingong

doi:10.3390/w14010077

Cited by 11 publications

(2 citation statements)

References 24 publications

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“…The coordination number is an important parameter for characterizing loess's pore connectivity. The coordination number plays a crucial role in loess's seepage behavior, and a higher coordination number indicates better pore connectivity 25 . Fig.…”

Section: Resultsmentioning

confidence: 99%

Relationship between spatial topology and loess permeability based on computed tomography–scanning technology

Yang

Shang

et al. 2022

Preprint

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Loess’s permeability properties increase under alternating wet and dry conditions, a phenomenon that is closely related to the soil’s pore structure. Among the pore structure properties, spatial topology is important. To further investigate the relationship between loess’s spatial topography and its infiltration properties under alternating wet and dry conditions, loess with different water contents is scanned by an industrial computed tomography (CT) scanner, and single-phase seepage simulations are performed. The results show that the diameters of the connected pore spaces increase along with water content; the pore throat length is positively correlated with the water content, reaching a maximum of 753.32 μm; and greater water contents result in stronger pore connectivity and larger increases of connected pore space coordination numbers. The results of the permeability simulation show that increases in connected pores, pore throat lengths, and coordination numbers lead to increased permeability, and the correlation is strongest between the coordination number and permeability. It is important to study the relationship between spatial topology and loess permeability for practical engineering applications.

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Section: Resultsmentioning

confidence: 99%

Relationship between spatial topology and loess permeability based on computed tomography–scanning technology

Yang

Shang

et al. 2022

Preprint

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“…Therefore, CFD scholars often use the KC equation to estimate the permeability of the goaf, which is then used as a UDF (User-Defined Function) input when constructing the porous media model. The limitations of KC as a semi-empirical equation have been widely demonstrated [13,14]. in addition to the abovementioned problems, conventional CFD methods treat porous media as volume-averaged continua without decomposing microscale features, making it difficult to achieve results associated with microscale structures [15,16].…”

Section: Introductionmentioning

confidence: 99%

Study of the Flow Field and Permeability Characteristics in the Goaf using the OpenPNM Package

Gao,

Li,

Shi

et al. 2024

Archives of Mining Sciences

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The roof-caving step scale goaf behind the working face is sensitive to the region’s spontaneous combustion and gas concentration distribution, including many rock block cracks and holes. A severe deviation from the dynamics of fluids in porous media by representative element volume (REV), leading to the results of Computational Fluid Dynamics (CFD) simulation, has a significant error. A heterogeneous two-dimensional pore network model was established to simulate the goaf flow accurately. The network was first created using the simple cubic lattice in the OpenPNM package, and the spatial distribution of the “O-ring” bulking factor was mapped to the network. The bulking factor and Weibull distribution were combined to produce the size distribution of the pore and throat in the network. The constructed pore network model was performed with single-phase flow simulations. The study determined the pore structure parameters of the pore network through the goaf’s risked falling characteristics and described the flow field’s distribution characteristics in the goaf. The permeability coefficient increases as pore diameter, throat diameter, pore volume and throat volume increase and increases as throat length decreases. The correlation between throat volume and permeability coefficient is the highest, which indicates that the whole throat is the main control factor governing the air transport capacity in the goaf. These results may provide some guidelines for controlling thermodynamic disasters in the goaf.

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Classification of carbonate reservoir rocks using combination of electrical-elastic properties: a new rock typing approach

Najafi-Silab,

Soleymanzadeh,

Kord

et al. 2023

Bull Eng Geol Environ

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A Pore Network Approach to Study Throat Size Effect on the Permeability of Reconstructed Porous Media

Cited by 11 publications

References 24 publications

Relationship between spatial topology and loess permeability based on computed tomography–scanning technology

Relationship between spatial topology and loess permeability based on computed tomography–scanning technology

Study of the Flow Field and Permeability Characteristics in the Goaf using the OpenPNM Package

Classification of carbonate reservoir rocks using combination of electrical-elastic properties: a new rock typing approach

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