气候变化领域集成服务门户(CCPortal): The Complexity of Nonlinear Flow and non-Fickian Transport in Fractures Driven by Three-Dimensional Recirculation Zones

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DOI	10.1029/2020JB020028
	The Complexity of Nonlinear Flow and non-Fickian Transport in Fractures Driven by Three-Dimensional Recirculation Zones
	Wang L.; Cardenas M.B.; Zhou J.-Q.; Ketcham R.A.
发表日期	2020
ISSN	21699313
卷号	125 期号:9
英文摘要	Although nonlinear fracture flow and non-Fickian transport are common in natural settings, the mechanisms driving and controlling these intertwined phenomena are seldom scrutinized together. Here we investigated the critical role of recirculation zones (RZs) in controlling both nonlinear flow and non-Fickian transport through numerical simulation experiments within three-dimensional real fractures. RZs were quantitatively mapped from fully resolved flow fields directly simulated across increasing Reynolds number (Re). The development and growth of RZs, which are related to aperture expansion and contraction, determine the degree of flow nonlinearity. Moreover, expanding RZs have more capacity to capture and later release solutes back to the main flow. This always results in non-Fickian transport with bimodal and sometimes multimodal breakthrough curves (BTCs). The time interval between the BTC modes is related via a power law. The Re and RZ volume are sufficient for characterizing the bimodal BTC. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	bimodal breakthrough curves; Forchheimer equation; fracture flow; non-Fickian transport; nonlinear flow; recirculation zone
语种	英语
来源期刊	Journal of Geophysical Research: Solid Earth
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/187615
作者单位	Department of Geological Sciences, University of Texas at Austin, Austin, TX, United States; Now at Institute of Surface-Earth System Science, School of Earth System Science, Tianjin University, Tianjin, China; Faculty of Engineering, China University of Geosciences, Wuhan, China
推荐引用方式 GB/T 7714	Wang L.,Cardenas M.B.,Zhou J.-Q.,et al. The Complexity of Nonlinear Flow and non-Fickian Transport in Fractures Driven by Three-Dimensional Recirculation Zones[J],2020,125(9).
APA	Wang L.,Cardenas M.B.,Zhou J.-Q.,&Ketcham R.A..(2020).The Complexity of Nonlinear Flow and non-Fickian Transport in Fractures Driven by Three-Dimensional Recirculation Zones.Journal of Geophysical Research: Solid Earth,125(9).
MLA	Wang L.,et al."The Complexity of Nonlinear Flow and non-Fickian Transport in Fractures Driven by Three-Dimensional Recirculation Zones".Journal of Geophysical Research: Solid Earth 125.9(2020).