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Issue 20, 2012
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A + B → C reaction fronts in Hele-Shaw cells under modulated gravitational acceleration

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Abstract

The dynamics of A + B → C reaction fronts is studied under modulated gravitational acceleration by means of a combination of parabolic flight experiments and numerical simulations. During modulated gravity the front position undergoes periodic modulation with an accelerated front propagation under hyper-gravity together with a slowing down under low gravity. The underlying reason for this is an amplification and a decay, respectively, of the buoyancy-driven double vortex associated with the front propagation under standard gravitational acceleration, as explained by reaction–diffusion–convection simulations of convection around an A + B → C front. Deeper insights into the correlation between grey-value changes in the experimental shadowgraph images and characteristic changes in the concentration profiles are obtained by a numerical simulation of the imaging process.

Graphical abstract: A + B → C reaction fronts in Hele-Shaw cells under modulated gravitational acceleration

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Publication details

The article was received on 13 Jan 2012, accepted on 14 Mar 2012 and first published on 14 Mar 2012


Article type: Paper
DOI: 10.1039/C2CP40132K
Citation: Phys. Chem. Chem. Phys., 2012,14, 7337-7345
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    A + B → C reaction fronts in Hele-Shaw cells under modulated gravitational acceleration

    K. Eckert, L. Rongy and A. D. Wit, Phys. Chem. Chem. Phys., 2012, 14, 7337
    DOI: 10.1039/C2CP40132K

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