Spatio-temporal dynamics in large arrays of fluid-elastic, Toda-type oscillators

New experiments on the dynamics of 300 elastic oscillators in a steady cros s flow are described. Impact constraints between the rods mimic Toda-type e xponential potentials. Unlike single row dynamics, which lead to limit cycl e behavior, multi-row arrays seem to exhibit chaotic though not necessarily , low-dimensional dynamics, at a critical flow value. With increasing flow velocity, organized wave-like structures appear to develop as the impact ra te between rods increases. Experimental models of this type may serve to he lp understand complex dynamics in large array heat exchange systems. It may also be a model to understand wind crop dynamics and damage. (C) 2001 Else vier Science B.V. All rights reserved.