Abstract
A two-dimensional Couette cell is formed by drawing a soap film over the annular region between an inner rotating disk and a fixed circular hole. When the inner disk is concentric, a smooth laminar flow is observed for all rotation rates. However, when the inner disk is eccentric, the film thickness fluctuates in space and time. Spectral analysis of reveals a power-law dependence on spatial scales that is consistent with Batchelor's calculation for turbulent dispersion of a passive scalar.
- Received 14 November 1994
DOI:https://doi.org/10.1103/PhysRevLett.75.236
©1995 American Physical Society