| DOI: | 10.1002/2015GL065036
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| 论文题名: | Dissolution patterns and mixing dynamics in unstable reactive flow |
| 作者: | Hidalgo J.J.; Dentz M.; Cabeza Y.; Carrera J.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-8602
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| EISSN: | 1944-8333
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| 出版年: | 2015
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| 卷: | 42, 期:15 | | 起始页码: | 6357
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| 结束页码: | 6364
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| 语种: | 英语
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| 英文关键词: | convection
; dissolution patterns
; fluid deformation
; mixing
; porous media
; reactive transport
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| Scopus关键词: | Boundary layers
; Deformation
; Dissolution
; Fluidity
; Heat convection
; Mixing
; Porous materials
; Reaction rates
; Chemical dissolution
; Dissolution patterns
; Fingering instabilities
; Fluid fluid interfaces
; Hierarchical structures
; Hydrodynamic instabilities
; Interfacial mixing
; Reactive transport
; Transport properties
; boundary layer
; convection
; deformation
; dissolution
; dome
; fluid dynamics
; hydrodynamics
; instability
; mixing
; porous medium
; Rayleigh number
; reactive transport
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| 英文摘要: | We study the fundamental problem of mixing and chemical reactions under a Rayleigh-Taylor-type hydrodynamic instability in a miscible two-fluid system. The dense fluid mixture, which is generated at the fluid-fluid interface, leads to the onset of a convective fingering instability and triggers a fast chemical dissolution reaction. Contrary to intuition, the dissolution pattern does not map out the finger geometry. Instead, it displays a dome-like, hierarchical structure that follows the path of the ascending fluid interface and the regions of maximum mixing. These mixing and reaction hot spots coincide with the flow stagnation points, at which the interfacial mixing layer is compressed and deformed. We show that the deformation of the boundary layer around the stagnation points controls the evolution of the global scalar dissipation and reaction rates and shapes the structure of the reacted zones. The persistent compression of the mixing layer explains the independence of the mixing rate from the Rayleigh number when convection dominates. ©2015. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84940452881&doi=10.1002%2f2015GL065036&partnerID=40&md5=c58639cc9fa2b6815617f025e0e80311
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/8218
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| Appears in Collections: | 科学计划与规划
气候变化与战略
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作者单位: | Spanish National Research Council (IDAEA-CSIC), Barcelona, Spain
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| Recommended Citation: | |
Hidalgo J.J.,Dentz M.,Cabeza Y.,et al. Dissolution patterns and mixing dynamics in unstable reactive flow[J]. Geophysical Research Letters,2015-01-01,42(15).
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