Hydrodynamic turbulence and diffusion-controlled reactions. Simulation of the effect of stirring on the oscillating Belousov-Zhabotinsky reaction with the radicalator model

Zoltán Noszticzius, Zsolt Bodnár, László Garamszegi, Mária Wittmann

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

Different stirring effects of the Belousov-Zhabotinsky (BZ) reaction observed by previous authors and also reported here can be explained and modeled semiquantitatively by a diffusion-controlled radical-radical reaction step of the Radicalator. It is shown that hydrodynamic turbulence can accelerate the rate of a diffusion-controlled reaction considerably provided that both reactants of the diffusion-controlled step are present in low concentrations (less than 10-6 M). A stirring effect can indicate the presence of a diffusion-controlled step in the mechanism of other (non-BZ) reactions as well. Finally, it is found that uniform ultrasonic stirring can substitute for the less uniform mechanical stirring in the BZ reaction.

Original languageEnglish
Pages (from-to)6575-6580
Number of pages6
JournalJournal of physical chemistry
Volume95
Issue number17
Publication statusPublished - Dec 1 1991

ASJC Scopus subject areas

  • Engineering(all)
  • Physical and Theoretical Chemistry

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