Jump to main content
Jump to site search

Issue 47, 2014
Previous Article Next Article

Convective dynamics of traveling autocatalytic fronts in a modulated gravity field

Author affiliations

Abstract

When traveling in thin solution layers, autocatalytic chemical fronts may be deformed and accelerated by convective currents that develop because of density and surface tension gradients related to concentration and thermal gradients across the front. On earth, both buoyancy and Marangoni related flows can act in solution layers open to the air while only buoyancy effects operate in covered liquid layers. The respective effects of density and surface tension induced convective motions are analysed here by studying experimentally the propagation of autocatalytic fronts in uncovered and covered liquid layers during parabolic flights in which the gravity field is modulated periodically. We find that the velocity and deformation of the front are increased during hyper-gravity phases and reduced in the micro-gravity phase. The experimental results compare well with numerical simulations of the evolution of the concentration of the autocatalytic product coupled to the flow field dynamics described by Navier–Stokes equations.

Graphical abstract: Convective dynamics of traveling autocatalytic fronts in a modulated gravity field

Back to tab navigation

Publication details

The article was received on 05 Jun 2014, accepted on 17 Oct 2014 and first published on 21 Oct 2014


Article type: Paper
DOI: 10.1039/C4CP02480J
Citation: Phys. Chem. Chem. Phys., 2014,16, 26279-26287
  • Open access: Creative Commons BY license
  •   Request permissions

    Convective dynamics of traveling autocatalytic fronts in a modulated gravity field

    D. Horváth, M. A. Budroni, P. Bába, L. Rongy, A. De Wit, K. Eckert, M. J. B. Hauser and Á. Tóth, Phys. Chem. Chem. Phys., 2014, 16, 26279
    DOI: 10.1039/C4CP02480J

    This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. Material from this article can be used in other publications provided that the correct acknowledgement is given with the reproduced material.

    Reproduced material should be attributed as follows:

    • For reproduction of material from NJC:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the Centre National de la Recherche Scientifique (CNRS) and the RSC.
    • For reproduction of material from PCCP:
      [Original citation] - Published by the PCCP Owner Societies.
    • For reproduction of material from PPS:
      [Original citation] - Published by The Royal Society of Chemistry (RSC) on behalf of the European Society for Photobiology, the European Photochemistry Association, and RSC.
    • For reproduction of material from all other RSC journals:
      [Original citation] - Published by The Royal Society of Chemistry.

    Information about reproducing material from RSC articles with different licences is available on our Permission Requests page.

Search articles by author

Spotlight

Advertisements