Buoyancy-driven instabilities around miscible A plus B→C reaction fronts: A general classification

被引：50

作者：

Trevelyan, P. M. J. ^{[1
]}

Almarcha, C. ^{[1
]}

De Wit, A. ^{[1
]}

机构：

[1] ULB, Nonlinear Phys Chem Unit, Ctr Nonlinear Phenomena & Complex Syst, Fac Sci, B-1050 Brussels, Belgium

来源：

PHYSICAL REVIEW E | 2015年 / 91卷 / 02期

关键词：

DIFFUSIVE FINGER CONVECTION; HELE-SHAW CELL; COLOR INDICATOR; POROUS-MEDIA; STABILITY; ONSET; FLOWS;

D O I：

10.1103/PhysRevE.91.023001

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

Upon contact between miscible solutions of reactants A and B along a horizontal interface in the gravity field, various buoyancy-driven instabilities can develop when an A + B -> C reaction takes place and the density varies with the concentrations of the various chemicals. To classify the possible convective instability scenarios, we analyze the spatial dependence of the large time asymptotic density profiles as a function of the key parameters of the problem, which are the ratios of diffusion coefficients and of solutal expansion coefficients of species A, B, and C. We find that 62 different density profiles can develop in the reactive problem, whereas only 6 of them can be obtained in the nonreactive one.

引用

页数：8

共 40 条

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D'Hernoncourt, J.
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Trevelyan, P. M. J.
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De Wit, A.
PHYSICAL REVIEW E, 2016, 94 (04)
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Rongy, L.
Trevelyan, P. M. J.
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PHYSICAL REVIEW LETTERS, 2008, 101 (08)
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Emami-Meybodi, Hamid
Zhang, Fengyuan
JOURNAL OF FLUID MECHANICS, 2021, 926
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Almarcha, C.
Trevelyan, P. M. J.
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JOURNAL OF PHYSICAL CHEMISTRY LETTERS, 2010, 1 (04): : 752 - 757
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Gerard, T.
De Wit, A.
WAVE MOTION, 2011, 48 (08) : 814 - 823
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Kim, Min Chan
CHEMICAL ENGINEERING SCIENCE, 2014, 112 : 56 - 71
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Rongy, L.
Goyal, N.
Meiburg, E.
De Wit, A.
JOURNAL OF CHEMICAL PHYSICS, 2007, 127 (11):
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Levitan, D.
D'Onofrio, A.
CHAOS, 2012, 22 (03)

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