Crossover from a square to a hexagonal pattern in faraday surface waves
We report on surface wave pattern formation in a Faraday experiment operated at a very shallow filling level, where modes with a subharmonic and harmonic time dependence interact. Associated with this distinct temporal behavior are different pattern selection mechanisms, favoring squares or hexagons, respectively. In a series of bifurcations running through a pair of superlattices the surface wave pattern transforms between the two incompatible symmetries. The close analogy to two- and three-dimensional crystallography is pointed out.
Wagner
C
Institut fur Technische Physik, Universitat des Saarlandes, Postfach 151150, D-66041 Saarbrucken, Germany.
Muller
HW
Knorr
K