Pattern of reaction diffusion fronts in laminar flows.
Autocatalytic reaction between reacted and unreacted species may propagate as solitary waves, namely, at a constant front velocity and with a stationary concentration profile, resulting from a balance between molecular diffusion and chemical reaction. The effect of advective flow on the autocatalytic reaction between iodate and arsenous acid in cylindrical tubes and Hele-Shaw cells is analyzed experimentally and numerically using lattice Bhatnagar-Gross-Krook simulations. We do observe the existence of solitary waves with concentration profiles exhibiting a cusp and we delineate the eikonal and mixing regimes recently predicted.
Leconte
M
M
Laboratoire Fluides Automatique et Systèmes Thermiques, Universités Pierre et Marie Curie and Paris Sud, C.N.R.S. (UMR 7608) Bâtiment 502, Campus Universitaire, 91405 Orsay Cedex, France.
Martin
J
J
Rakotomalala
N
N
Salin
D
D
D000818:Animals; D004058:Diffusion; D008962:Models, Theoretical; D011157:Population Dynamics