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Water
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Modeling Flow and Transport in Porous and Fractured Media
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Modeling Flow and Transport in Porous and Fractured Media

A special issue of Water (ISSN 2073-4441). This special issue belongs to the section "Hydraulics and Hydrodynamics".

Deadline for manuscript submissions: 30 May 2024 | Viewed by 3143

Special Issue Editors

Dr. Min Liu

E-Mail Website
Guest Editor
Corning Research & Development, Corning, NY 14831, USA
Interests: reactive flow; porous media; heat and mass transfer
Dr. Yunkai Ji

E-Mail Website
Guest Editor
Qingdao Institute of Marine Geology, China Geological Survey, Qingdao 266071, China
Interests: gas hydrate; flow in porous media; pore-scale modeling; energy recovery
Dr. Feipeng Wu

E-Mail Website
Guest Editor
School of Petroleum Engineering, China University of Petroleum, East China, Qingdao 266580, China
Interests: hydrocarbon development; reservoir fracturing; multiphase flow

Special Issue Information

Dear Colleagues,

Fluid flow and transport in porous and fractured media is an important and interesting topic for scientific and engineering studies. A fundamental understanding of these processes is imperative for a broad range of applications for environmental and industrial problems (e.g., groundwater contaminant mitigation, geo-energy development, CO2 sequestration, fuel cells development, and water purification).  Recent advancements of advanced imaging techniques, high-performance computing, and machine learning algorithms have facilitated us with powerful tools to capture multiscale complex physical processes  and improve computational efficiency and prediction accuracy.

This Special Issue, titled “Modeling Flow and Transport in Porous and Fractured Media”, intends to report the recent development of computational models for providing quantitative predictions of fluid and transport in fractured and porous media.

Research studies include numerical approaches, case studies, and data analytics. Our interests focus on, but are not limited to, the following topics:

  • Reactive transport in porous and fractured media;
  • Pore-scale and field-scale modeling;
  • The geo-storage of CO2 or H2;
  • The development of geo-energy (hydrocarbon and geotherm);
  • Fuel cell development;
  • Membrane and filters design for water purification;
  • Interactions between fluids and solids;
  • Data-driven modeling (machine learning).

Dr. Min Liu
Dr. Yunkai Ji
Dr. Feipeng Wu
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Water is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fluid flow
  • transport
  • porous media
  • numerical modeling

Published Papers (3 papers)

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Research

20 pages, 5050 KiB  
Article
Analytically Enhanced Random Walk Approach for Rapid Concentration Mapping in Fractured Aquifers
by Ahmed Yosri, Maysara Ghaith, Mohamed Ismaiel Ahmed and Wael El-Dakhakhni
Water 2024, 16(7), 1020; https://doi.org/10.3390/w16071020 - 01 Apr 2024
Viewed by 654
Abstract
The efficient management and remediation of contaminated fractured aquifers necessitate an accurate prediction of the spatial distribution of contaminant concentration within the system. Related existing analytical solutions are only applicable to single fractures and have not yet been extrapolated to the aquifer scale [...] Read more.
The efficient management and remediation of contaminated fractured aquifers necessitate an accurate prediction of the spatial distribution of contaminant concentration within the system. Related existing analytical solutions are only applicable to single fractures and have not yet been extrapolated to the aquifer scale where a network of connected fractures exists. The Random Walk Particle Tracking (RWPT) method has been extensively adopted for concentration mapping in Discrete Fracture Networks (DFNs), albeit at exorbitant computational costs and without efficiently accommodating complex physical processes (e.g., two-site kinetics). This study introduces an analytically enhanced Spatiotemporal Random Walk (STRW) approach that facilitates the efficient time-dependent mapping of contaminant concentration in DFNs. The STRW approach employs a distribution function to simultaneously estimate the displacement of particles released through the system either instantaneously or over time. The STRW approach efficiently reproduced the contaminant concentration, calculated using available analytical solutions under a range of fate and transport mechanisms. The efficacy of the STRW approach is also confirmed in a synthetic impermeable DFN through replicating the concentration maps produced using the RWPT method. The developed approach represents an accurate and computationally efficient dynamic concentration mapping technique that can support the effective operation, management, and remediation of fractured aquifers under contamination events. Full article
(This article belongs to the Special Issue Modeling Flow and Transport in Porous and Fractured Media)
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19 pages, 3718 KiB  
Article
Universal Relationship between Mass Flux and Properties of Layered Heterogeneity on the Contaminant-Flushing Process
by Zehao Chen and Hongbin Zhan
Water 2023, 15(18), 3292; https://doi.org/10.3390/w15183292 - 18 Sep 2023
Viewed by 875
Abstract
To remove contaminants from a layered heterogeneous porous system where the flow direction is parallel to the horizontal layering, the flushing front may advance faster in one layer than the other, resulting in a significant vertical concentration gradient across the layer interface. This [...] Read more.
To remove contaminants from a layered heterogeneous porous system where the flow direction is parallel to the horizontal layering, the flushing front may advance faster in one layer than the other, resulting in a significant vertical concentration gradient across the layer interface. This gradient leads to mass exchange between the layers due to the vertical dispersive transport. Such a mass exchange phenomenon can greatly alter the mass (and heat if the temperature is a concern) distribution in a multi-layer porous media system but has never been investigated before in a quantitative manner. In this study, high-resolution finite-element numerical models have been employed to investigate how transport properties affect contaminant transport during flushing, using a two-layer system as an example. The results showed that the porosity and retardation factor play similar roles in affecting mass flux across the interface. Increasing the porosity (or retardation factor) of one layer with a faster flushing velocity would decrease the total mass flux across the interface of the layers, while increasing the porosity (or retardation factor) of the layer with a slower flushing velocity played an adverse influence. Furthermore, increasing the transverse dispersivity of any layer increased the mass flux across the interface of the two layers. However, changes in the transverse dispersivity did not affect the spatial range (or gap along the flow direction) in which significant vertical mass flux occurs. This study has important implications for managing contaminant remediation in layered aquifers. Full article
(This article belongs to the Special Issue Modeling Flow and Transport in Porous and Fractured Media)
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14 pages, 6572 KiB  
Article
Research on Subsidence Induced by the Dewatering–Curtain Interaction in the Deep Foundation Pit of the Shield Launching Shaft in Shenzhen, China
by Xingsheng Zhang, Mengke Hu, Xing Chen, Jinyu Dong and Shipeng Liu
Water 2023, 15(9), 1798; https://doi.org/10.3390/w15091798 - 08 May 2023
Cited by 1 | Viewed by 1188
Abstract
The waterproof curtain plays an important role in the dewatering of a deep foundation pit. Recognition of the depth of the waterproof curtain inserted into the confined aquifer at different depths may help control ground subsidence due to dewatering, but subsidence analysis of [...] Read more.
The waterproof curtain plays an important role in the dewatering of a deep foundation pit. Recognition of the depth of the waterproof curtain inserted into the confined aquifer at different depths may help control ground subsidence due to dewatering, but subsidence analysis of the interaction between dewatering and the waterproof curtain requires further study. In this study, we mainly analyze the relationship between ground subsidence and dewatering based on the shield shaft pit of the Qianhai-Nanshan deep tunnel project in Shenzhen. Our numerical simulation results show that the ground subsidence around the foundation pit decreases with an increase in the depth of the waterproof curtain inserted into the confined aquifer, and when the waterproof curtain completely penetrates the confined aquifer, the ground subsidence caused by pit dewatering is minimal. Our numerical simulation results are consistent with the actual on-site dewatering monitoring data. Our results suggest that the diaphragm wall is an effective measure to control the ground subsidence in deep foundations, helping to reduce excessive dewatering. Full article
(This article belongs to the Special Issue Modeling Flow and Transport in Porous and Fractured Media)
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