  Autocatalytic reaction fronts between two reacting species in the absence of
fluid flow, propagate as solitary waves. The coupling between autocatalytic
reaction front and forced hydrodynamic flow may lead to stationary front 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 static stationary fronts, i.e
Frozen Fronts, $FF$. Towards that purpose, we perform experiments, analytical
computations and numerical simulations with the autocatalytic Iodate Arsenious
Acid reaction ($IAA$) over a wide range of flow velocities around a solid disk.
For the same set of control parameters, we observe two types of frozen fronts:
an upstream $FF$ which avoid the solid disk and a downstream $FF$ with two
symmetric branches emerging from the solid disk surface. We delineate the range
over which we do observe these Frozen Fronts. We also address the relevance of
the so-called eikonal, thin front limit to describe the observed fronts and
select the frozen front shapes.
