DOI: 10.1002/2014GL062038
论文题名: Impact of fluid deformation on mixing-induced chemical reactions in heterogeneous flows
作者: Borgne T.L. ; Ginn T.R. ; Dentz M.
刊名: Geophysical Research Letters
ISSN: 0094-9567
EISSN: 1944-9298
出版年: 2014
卷: 41, 期: 22 起始页码: 7898
结束页码: 7906
语种: 英语
英文关键词: flow topology
; fluid deformation
; lamella
; mixing
; porous media
; reactive transport
Scopus关键词: Chemical reactions
; Deformation
; Flow fields
; Flow velocity
; Mixing
; Porous materials
; Reaction rates
; Topology
; Chemical equilibriums
; Concentration gradients
; Equilibrium reactions
; Flow topology
; lamella
; Reactive transport
; Spatial characteristics
; Systematic evaluation
; Transport properties
; deformation
; flow velocity
; geophysical method
; heterogeneity
; homogeneity
; magnitude
; porous medium
; spatial analysis
; topology
英文摘要: Fast chemical reactions in geophysical flows are controlled by fluid mixing, which perturbs local chemical equilibria and thus triggers chemical reactions. Spatial fluctuations in the flow velocity lead to deformation of material fluid elements, which form the support volumes of transported chemical species. We develop an approach based on a lamellar representation of fluid mixing that provides a direct link between fluid deformation, the distribution of concentration gradients, and the upscaled reaction rates for fast reversible reactions. The temporal evolution of effective reaction rates is determined by the flow topology and the distribution of local velocity gradients. This leads to a significant increase of the reaction efficiency, which turns out to be orders of magnitude larger than in homogeneous flow. This approach allows for the systematic evaluation of the temporal evolution of equilibrium reaction rates and establishes a direct link between the reaction efficiency and the spatial characteristics of the underlying flow field as quantified by the deformation of material fluid elements. © 2014. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84923332797&doi=10.1002%2f2014GL062038&partnerID=40&md5=abbf2712b3cb376c9dba6a1a05cec0d6
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/6831
Appears in Collections: 气候减缓与适应
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作者单位: Geosciences Rennes, UMR 6118, Université de Rennes 1, Rennes, France
Recommended Citation:
Borgne T.L.,Ginn T.R.,Dentz M.. Impact of fluid deformation on mixing-induced chemical reactions in heterogeneous flows[J]. Geophysical Research Letters,2014-01-01,41(22).