Session L41: Pattern Formation, Nonlinear Dynamics, Computational Fluid Dynamics

2:30 PM–5:30 PM, Tuesday, February 28, 2012
Room: 156B

Sponsoring Unit: DFD
Chair: Daphne Klotsa, University of Michigan

Abstract ID: BAPS.2012.MAR.L41.7

Abstract: L41.00007 : Self-Sustained Front Propagation in Disordered Flow

3:42 PM–3:54 PM

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  Severine Atis

  Harold Auradou

  Dominique Salin

  Laurent Talon

We generate propagative fronts resulting from a balance between molecular diffusion and non-linear chemical reaction. These fronts behave as solitary waves with a constant velocity and a stationary concentration profile. The interaction between this self-sustained system and a disordered flow leads to complex structures formation. We have performed experiments of the front propagation over a wide range of stochastic flow rates, in porous media. We have determined the structure and the velocity distribution measured along the front. The concentration profile displays salient spatial features such as scaling laws and pattern formation.

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