# Noise, coherent fluctuations, and the onset of order in an oscillated granular fluid.

@article{Goldman2003NoiseCF, title={Noise, coherent fluctuations, and the onset of order in an oscillated granular fluid.}, author={Daniel I. Goldman and Jack Swift and Harry L. Swinney}, journal={Physical review letters}, year={2003}, volume={92 17}, pages={ 174302 } }

We study fluctuations in a vertically oscillated layer of grains below the critical acceleration for the onset of ordered standing waves. As onset is approached, transient disordered waves with a characteristic length scale emerge and increase in power and coherence. The scaling behavior and the shift in the onset of order agrees with the Swift-Hohenberg theory for convection in fluids. However, the noise in the granular system is an order of magnitude larger than the thermal noise in the most…

## 26 Citations

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