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Zusammenfassung:
Experiments on dewetting thin polymer films confirm the theoretical prediction that thermal noise can
strongly influence characteristic time scales of fluid flow and cause coarsening of typical length scales.
Comparing the experiments with deterministic simulations, we show that the Navier-Stokes equation has
to be extended by a conserved bulk noise term to accomplish the observed spectrum of capillary waves.
Because of thermal fluctuations the spectrum changes from an exponential to a power law decay for large
wave vectors. Also the time evolution of the typical wave vector of unstable perturbations exhibits noiseinduced
coarsening that is absent in deterministic hydrodynamic flow.
