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Showing papers by "David S. Cannell published in 2008"


Journal ArticleDOI
TL;DR: An experimental study of the dynamics of thermal fluctuations in a 4.86 mm thick layer of CS2 heated from above, where the results for the power spectra compare very well with theory, but slight deviations are seen for larger gradients.
Abstract: We report an experimental study of the dynamics of thermal fluctuations in a 4.86 mm thick layer of ${\mathrm{CS}}_{2}$ heated from above. Stabilizing gradients ranged from 10.3 to $61.7\text{ }\text{ }\mathrm{K}/\mathrm{cm}$. Power spectral measurements were made over the wave vector range $9\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}lql100\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}1}$, using a shadowgraph apparatus. Over this range, the spectra change from having a well-resolved oscillatory mode at low $q$ to monotonic decay at higher $q$. For the smallest gradient, the results for the power spectra compare very well with theory, but slight deviations are seen for larger gradients.

19 citations