2005/04/01 by M. Leconte, Leconte, M., J. Martin +5
Computer Science · Physics and Astronomy · #Chemical Physics (physics.chem-ph) #FOS: Physical sciences #Fluid Dynamics (physics.flu-dyn) #Nonlinear Dynamics and Pattern Formation #Quantum optics and atomic interactions #Spectroscopy and Quantum Chemical Studies #physics.chem-ph #physics.flu-dyn
paper · pdf · doi:10.48550/arxiv.physics/0504012
17 pages, 11 figures, to be submitted to Physics of Fluids
openalex publication_date 2005/04/01 · arxiv created 2005/04/04 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Autocatalytic reaction fronts 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. A velocity field in the supporting medium may affect the propagation of such fronts through different phenomena: convection, diffusion enhancement, front shape changes... We report here on an experimental study and lattice BGK numerical simulations of the effect of an oscillating flow on the autocatalytic reaction between iodate and arsenous acid in a Hele-Shaw cell. In the low frequency range covered by the experiments, the front behavior is controlled by the flow across the gap and can be reproduced with 2D numerical simulations. An analytical solution is also derived under the condition of a weak flow velocity, and is found to be in reasonable agreement with our data.