Frozen Fronts selection in flow against self-sustained chemical waves

Laboratoire Fluides Automatique et Syst\`{e}mes Thermiques, Universit\'{e} Paris Sud, C.N.R.S. (UMR7608), B\^{a}timent 502, Campus Universitaire, 91405 Orsay Cedex, France Autocatalytic reaction fronts between two reacting species in the absence of fluid flow propagate as solitary waves. The coupling between autocatalytic reaction front and simple forced hydrodynamic flows may lead to stationary fronts whose velocity and shape depend on the underlying flow field. We focus on the issue of the chemo-hydrodynamic coupling between forced advection opposed to self-sustained chemical waves which can lead to Frozen Fronts, i.e. static stationary fronts, S. Saha et al, EPL 101, 38003 (2013). We perform experiments and numerical simulations with the well characterized autocatalytic Iodate Arsenous Acid reaction (IAA) over a wide range of flow velocities around a solid disk. We delineate the range over which we do observe these Frozen Fronts. We compare the shape of the observed Frozen Fronts to the computed ones in the so-called eikonal, thin front limit. In this limit, we are able to provide a scenario for the selection of the observed frozen states.