title: Hydrodynamic instability in the open system of the iodate-arsenous acid reaction.
abstract: Hydrodynamic instability arising in horizontally propagating vertical chemical fronts leading to the formation of a single stable convection roll is investigated experimentally in the iodate-arsenous acid reaction for various stoichiometry. In the presence of a free surface, the tilted reaction front becomes more elongated due to the evaporation of the surface active iodine and the decrease in the surface tension during the reaction. The experimental conditions are then identified where Marangoni instability represents the driving force for the distortion of the reaction front at the surface.
authors.affiliation: Department of Physical Chemistry and Materials Science, University of Szeged, Aradi vértanúk tere 1, Szeged H-6720, Hungary.
authors.forename: Éva
authors.initials: É
authors.lastname: Pópity-Tóth
authors.forename: Véronique
authors.initials: V
authors.lastname: Pimienta
authors.forename: Dezső
authors.initials: D
authors.lastname: Horváth
authors.forename: Ágota
authors.initials: Á
authors.lastname: Tóth