Phys. Rev. Lett. 90, 128302 (2003) [4 pages]Pattern of Reaction Diffusion Fronts in Laminar FlowsReceived 10 October 2002; published 27 March 2003 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. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.90.128302
DOI:
10.1103/PhysRevLett.90.128302
PACS:
82.40.Ck, 47.54.+r, 47.70.Fw
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