DOI: 10.1016/j.earscirev.2020.103439
论文题名: Tortuosity of porous media: Image analysis and physical simulation
作者: Fu J. ; Thomas H.R. ; Li C.
刊名: Earth Science Reviews
ISSN: 00128252
出版年: 2021
卷: 212 语种: 英语
中文关键词: Image analysis
; Microstructural characteristic
; Numerical simulation
; Porous media
; Tortuosity
; Transport property
英文关键词: correlation
; image analysis
; image resolution
; microstructure
; numerical method
; physical method
; porous medium
; size
; tortuosity
; transport process
英文摘要: Tortuosity is widely used as a critical parameter to predict transport properties of porous media, such as rocks and soils. But unlike other standard microstructural properties, the concept of tortuosity is vague with multiple definitions and various evaluation methods introduced in different contexts. Hydraulic, electrical, diffusional, and thermal tortuosities are defined to describe different transport processes in porous media, while geometrical tortuosity is introduced to characterize the morphological property of porous microstructures. In particular, the rapid development of microscopy imaging techniques has made digital microstructures of porous media increasingly accessible, from which geometrical and physical tortuosities can be evaluated using various image analysis and numerical simulation methods. These tortuosities are defined differently and can differ greatly in value, but in many works of literature, they are used interchangeably. To address this situation, we systematically examine geometrical, hydraulic, electrical, diffusional, and thermal tortuosities from the viewpoints of the definition and evaluation method. For the same porous medium, visible discrepancies are found in the evaluated geometrical and physical tortuosities, depending on the specific definition and the evaluation method adopted. This observation makes it questionable to directly use the geometrical tortuosity as a substitute for physical tortuosities, a common practice in the literature. Thus, the correlations between geometrical and physical tortuosities are further analyzed, which also takes into account the influence of both image size and resolution. From the correlation analysis, phenomenological relations between geometrical and physical tortuosities are established, so that the latter can be accurately predicted by using the former which is much cheaper to evaluate from digital microstructures. © 2020 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/166392
Appears in Collections: 气候变化与战略
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作者单位: Zienkiewicz Centre for Computational Engineering, College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, United Kingdom; Energy Safety Research Institute, College of Engineering, Swansea University Bay Campus, Swansea, SA1 8EN, United Kingdom
Recommended Citation:
Fu J.,Thomas H.R.,Li C.. Tortuosity of porous media: Image analysis and physical simulation[J]. Earth Science Reviews,2021-01-01,212