Nonlinear interactions in the density fingering of an acidity front

Tamás Bánsági Jr; Dezsö Horváth; Agota Tóth

doi:10.1063/1.1814078

Nonlinear interactions in the density fingering of an acidity front

J Chem Phys. 2004 Dec 15;121(23):11912-5. doi: 10.1063/1.1814078.

Authors

Tamás Bánsági Jr¹, Dezsö Horváth, Agota Tóth

Affiliation

¹ Department of Physical Chemistry, University of Szeged, P.O. Box 105, Szeged H-6701, Hungary.

PMID: 15634153
DOI: 10.1063/1.1814078

Abstract

Density fingering of the chlorite-tetrathionate reaction has been studied experimentally in a Hele-Shaw cell. The initially emerging cellular structure transforms into a single cell with constant--asymmetric and symmetric--shape in narrow reaction vessels. The interactions of fingers in wider Hele-Shaw cells lead to the coarsening of the patterns, however, splitting of fingers is observed as well. The long time evolution has been quantitatively described by the change in the mixing length, i.e., the amplitude of the patterns, and by the power-averaged cell number of the structures.