Orientation-dependent density fingering in an acidity front

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Abstract

Dependence of dispersion relation on the orientation of front propagation for an acid-catalyzed reaction was determined by carrying out density fingering of the chlorite-tetrathionate reaction in a Hele-Shaw cell. Planar fronts were initiated electrochemically by applying 3 V potential difference between a pair of thin Pt-wire electrodes. Results indicated that in the chlorite-tetrathionate reaction the downward propagating planar fronts were hydrodynamically unstable. This gave rise to a fluid flow which represented a small wave number instability, with the higher modes remaining stable as a result of the diffusive flux of the reaction.

Original languageEnglish
Pages (from-to)4399-4402
Number of pages4
JournalJournal of Chemical Physics
Volume117
Issue number9
DOIs
Publication statusPublished - szept. 1 2002

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ASJC Scopus subject areas

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

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