Density fingering of an exothermic autocatalytic reaction
Density fingering of an exothermic autocatalytic reaction
Density fingering of exothermic autocatalytic fronts in vertically oriented porous media and Hele-Shaw cells is studied theoretically for chemical reactions where the solutal and thermal contribution to density changes have opposite signs. The competition between these two effects leads to thermal plumes for ascending fronts. The descending fronts behave strikingly differently as they can feature, for some values of the parameters, fingers of constant amplitude and wavelength. The differences between up and down going fronts are discussed in terms of dispersion curves and nonlinear dynamics. The theoretically predicted dispersion curves are experimentally evidenced with the chlorite-tetrathionate reaction.
Bánsági, T.
3984187d-60fd-47f2-b6cb-f312dcedadae
Horváth, D.
128aef05-9217-4f40-bc1f-f871a6162594
Tóth, Á.
bcb80ff7-737b-4ddf-a0e2-3e8215ed87ce
Yang, J.
be012724-8ffc-4653-8ead-737afdf4ce09
Kalliadasis, S.
2db39b44-b535-4eff-89b3-a76757d7ab39
Wit, A. De
a3fd9837-6645-4d35-aad8-22799ecef0d7
18 November 2003
Bánsági, T.
3984187d-60fd-47f2-b6cb-f312dcedadae
Horváth, D.
128aef05-9217-4f40-bc1f-f871a6162594
Tóth, Á.
bcb80ff7-737b-4ddf-a0e2-3e8215ed87ce
Yang, J.
be012724-8ffc-4653-8ead-737afdf4ce09
Kalliadasis, S.
2db39b44-b535-4eff-89b3-a76757d7ab39
Wit, A. De
a3fd9837-6645-4d35-aad8-22799ecef0d7
Bánsági, T., Horváth, D., Tóth, Á., Yang, J., Kalliadasis, S. and Wit, A. De
(2003)
Density fingering of an exothermic autocatalytic reaction.
Physical Review E, 68.
(doi:10.1103/physreve.68.055301).
Abstract
Density fingering of exothermic autocatalytic fronts in vertically oriented porous media and Hele-Shaw cells is studied theoretically for chemical reactions where the solutal and thermal contribution to density changes have opposite signs. The competition between these two effects leads to thermal plumes for ascending fronts. The descending fronts behave strikingly differently as they can feature, for some values of the parameters, fingers of constant amplitude and wavelength. The differences between up and down going fronts are discussed in terms of dispersion curves and nonlinear dynamics. The theoretically predicted dispersion curves are experimentally evidenced with the chlorite-tetrathionate reaction.
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Published date: 18 November 2003
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Local EPrints ID: 505656
URI: http://eprints.soton.ac.uk/id/eprint/505656
ISSN: 1539-3755
PURE UUID: 6ab5a21d-01fe-4896-8095-a658c04a8a41
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Date deposited: 15 Oct 2025 16:51
Last modified: 16 Oct 2025 02:11
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Author:
T. Bánsági
Author:
D. Horváth
Author:
Á. Tóth
Author:
J. Yang
Author:
S. Kalliadasis
Author:
A. De Wit
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