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Dynamics of A + B -> C reaction fronts in the presence of buoyancy-driven convection.

par Rongy, Laurence ;Trevelyan, Philip ;De Wit, Anne
Référence Physical review letters, 101, 8, page (1-4), 084503
Publication Publié, 2008

Article révisé par les pairs

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Résumé :

The dynamics of A+B→C fronts in horizontal solution layers can be influenced by buoyancy-driven convection as soon as the densities of A, B, and C are not all identical. Such convective motions can lead to front propagation even in the case of equal diffusion coefficients and initial concentration of reactants for which reaction-diffusion (RD) scalings predict a nonmoving front. We show theoretically that the dynamics in the presence of convection can in that case be predicted solely on the basis of the knowledge of the one-dimensional RD density profile across the front. © 2008 The American Physical Society.