Application of upscaling methods for fluid flow and mass transport in multi-scale heterogeneous media: A critical review

Zhang, Xiaoying; Ma, Funing; Yin, Shangxian; Wallace, Corey D.; Soltanian, Mohamad Reza; Dai, Zhenxue; Ritzi, Robert W.; Ma, Ziqi; Zhan, Chuanjun; Lü, Xiaoshu

doi:10.1016/j.apenergy.2021.117603

Cited by 116 publications

(34 citation statements)

References 220 publications

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“…The results suggest that V RZ largely controls the tailing behavior, where large RZs would have more capacity to capture solutes and thus lead to a heavier tailing. Our new finding of relationship between n and β can be possibly used for upscaling transport process via deterministic method [29] for complex porous media in nature [30].…”

Section: Non-fickian Transport With Bimodal Tailing Process Depending...mentioning

confidence: 93%

The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone

Yang

Gu³

et al. 2022

Energies

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The solute transport process in porous media is central to understanding many geophysical processes and determines the success of engineered applications. However, fundamental understanding of solute transport in heterogeneous porous media remains challenging especially when inertial effects are significant. To address this challenge, we employed direct numerical simulations in a variety of intrapore geometries at a high Reynolds number (Re = 10) flow regime, where recirculation zones (RZs) are present with significant inertial effects. We find that the volume of RZs depends on pore geometries. Moreover, RZs serve as an immobile domain that can trap and release solutes that lead to non-Fickian transport, characterized by the early arrival and heavy tailing of breakthrough curves and bimodal residence time distributions (RTDs). Lastly, the late time portion of RTDs is fitted to the power law function with determined exponent n, where n depends on the pore geometries and consequently the volume of RZs. Our study sheds light on the mechanisms of an immobile zone on the solute transport, especially improving our understanding of late time transport tailing in pressurized heterogeneous porous media.

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Section: Non-fickian Transport With Bimodal Tailing Process Depending...mentioning

confidence: 93%

The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone

Yang

Gu³

et al. 2022

Energies

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“…According to the SWOT model (S refers to strengths, W refers to weakness, O refers to opportunities, and T refers to threats), they find that the competitive advantages of coal chemical industry include the following: abundant resources, complete varieties, low prices, leading technologies, regionally clustering development, guaranteed market demand, and optimistic industry prospects [1][2][3]. According to Michael Porter's "diamond model" theory, some scholars find that CTL which is short for coal-to-liquid is more competitive than oil in terms of market demand conditions, government, and technical feasibility [4,5]. And from the perspective of regional comparison, this theory is used for evaluation in six aspects, including resource endowment, market competitiveness, infrastructure, economic benefits, environmental impact, and policy support, finding that the coal chemical industry in Inner Mongolia and Shaanxi Province has the strongest comprehensive competitiveness [6][7][8].…”

Section: Literature Reviewmentioning

confidence: 99%

Competitiveness of Coal Chemical Industry Based on Diamond Model

Song

Wang

Sun

2022

Wireless Communications and Mobile Computing

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Coal chemical industry is one of the main ways of clean coal utilization. The orderly and regulated development of coal chemical industry is an important task in supply-side reform of China’s coal industry. China’s coal chemical industry has a good development foundation and great potentials and has taken the lead in some fields globally. Based on the six elements of the diamond model and qualitative analysis, an evaluation index system is constructed. The weights of different indexes are obtained through the entropy weight method, and the influence of the six elements on the competitiveness of the coal chemical industry is analyzed. The results show that among the six elements of the diamond model, horizontal competition delivers the greatest impact on the competitiveness of the coal chemical industry, followed by production factors, related and supportive industries, and the government, with demand conditions showing the least impact on the competitiveness of this industry.

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“…The problem is that processes governing small scale behavior (e.g., molecular diffusion) may become irrelevant at large scales, whereas new processes (e.g., dispersion) emerge in response to the change in scale. Recent reviews [147,148] summarize upscaling procedures. But the basic problem is that such procedures are well-defined to evaluate how a parameter (e.g., dispersivity) changes with scale.…”

Section: Lessons Learned Formal Upscaling and On-going Effortsmentioning

confidence: 99%

“…The three steps display uncertainties. Proper generation of geological variability remains a challenge [147,149,150]. RT transport difficulties are the subject of this paper.…”

Section: Lessons Learned Formal Upscaling and On-going Effortsmentioning

confidence: 99%

Reactive Transport: A Review of Basic Concepts with Emphasis on Biochemical Processes

Carrera¹,

Saaltink²,

Soler-Sagarra³

et al. 2021

Preprint

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Reactive transport (RT) couples bio-geo-chemical reactions and transport. RT is important to understand numerous scientific questions and solve some engineering problems. RT is highly multidisciplinary, which hinders the development of a body of knowledge shared by RT modelers and developers. The goal of this paper is to review the basic conceptual issues shared by all RT problems, so as to facilitate advance along the current frontier: biochemical reactions. To this end, we review the basic equations to point that chemical systems are controlled by the set of equilibrium reactions, which are easy to model, but whose rate is controlled by mixing. Since mixing is not properly represented by the standard advection-dispersion equation (ADE), we conclude that this equation is poor for RT. This leads us to review alternative transport formulations, and the methods to solve RT problems using both the ADE and alternative equations. Since equilibrium is easy, difficulties arise for kinetic reactions, which is especially true for biochemistry, where numerous frontiers are open (how to represent microbial communities, impact of genomics, effect of biofilms on flow and transport, etc.). We conclude with the basic 10 issues that we consider fundamental for any conceptually sound RT effort.

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Application of upscaling methods for fluid flow and mass transport in multi-scale heterogeneous media: A critical review

Cited by 116 publications

References 220 publications

The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone

The Effects of Pore Geometry on Late Time Solute Transport with the Presence of Recirculation Zone

Competitiveness of Coal Chemical Industry Based on Diamond Model

Reactive Transport: A Review of Basic Concepts with Emphasis on Biochemical Processes

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