Instabilities in propagating reaction-diffusion fronts of the iodate-arsenous acid reaction

Dezso Horváth, Kenneth Showalter

Research output: Contribution to journalArticle

71 Citations (Scopus)

Abstract

Instabilities in propagating fronts of the iodate-arsenous acid reaction are predicted by an empirical rate-law model. The planar front loses stability when the ratio of the reactant diffusivity to the autocatalyst diffusivity exceeds a critical value. The relative diffusivities can be altered by introducing a reagent that reacts specifically with the autocatalyst to form an immobile complex. Experiments were carried out using a convection-free gelled medium, loaded with reaction mixture containing complexing agent at different concentrations. Instabilities were found above a critical concentration, with the appearance of cellular fronts much like those predicted by the empirical rate-law model.

Original languageEnglish
Pages (from-to)2471-2478
Number of pages8
JournalThe Journal of Chemical Physics
Volume102
Issue number6
DOIs
Publication statusPublished - 1995

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry

Fingerprint Dive into the research topics of 'Instabilities in propagating reaction-diffusion fronts of the iodate-arsenous acid reaction'. Together they form a unique fingerprint.

  • Cite this