Dynamics of A+B→C Reaction Fronts in the Presence of Buoyancy-Driven Convection

P.M.J. Trevelyan, A. De Wit, L. Rongy

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Abstract

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.
Original languageEnglish
JournalPhysical Review Letters
Volume101
Issue number8
DOIs
Publication statusPublished - 22 Aug 2008

Keywords

  • reaction-diffusion-convection
  • buoyancy instabilities
  • reaction front

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