Pattern of Reaction Diffusion Front in Laminar Flows

Details Pattern of Reaction Diffusion Front in Laminar Flows Pattern of Reaction Diffusion Front in Laminar Flows

2002-10-11

arxiv.org/abs/physics/0210050v2

Physics

Fluid Dynamics

4 pages, 3 figures. This paper report on experiments and simulations in different geometries which test the theory of Boyd Edw

Scientific paper

10.1103/PhysRevLett.90.128302

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 BGK 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.

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