Observation of highly localized structures in a Faraday experiment with highly dissipative fluids

We present an experimental study about the Faraday instability using a highly dissipative fluid. The fluid layer is excited with a vertical periodic acceleration field. In this regimen of high viscosity and shallow fluid depth, we have found two very interesting phenomena. On the one hand, we observed a periodicity windows appearing after the whole classical crispation, on the other hand highly spatially localized structures are generated within the periodicity window that propagates on fluid surface.