Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2007-03-08
Physics
Condensed Matter
Other Condensed Matter
Scientific paper
10.1103/PhysRevLett.98.254505
Here we apply nanomechanical resonators to the study of oscillatory fluid dynamics. A high-resonance-frequency nanomechanical resonator generates a rapidly oscillating flow in a surrounding gaseous environment; the nature of the flow is studied through the flow-resonator interaction. Over the broad frequency and pressure range explored, we observe signs of a transition from Newtonian to non-Newtonian flow at $\omega\tau\approx 1$, where $\tau$ is a properly defined fluid relaxation time. The obtained experimental data appears to be in close quantitative agreement with a theory that predicts purely elastic fluid response as $\omega\tau\to \infty$.
Ekinci Kamil L.
Karabacak Devrez M.
Yakhot Victor
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