Abstract
Turbulent flow of superfluid at mK temperatures around an oscillating microsphere is known to be unstable at low driving forces, switching intermittently between turbulent and laminar phases. The lifetimes of the turbulent phases are exponentially distributed, and the mean lifetimes grow exponentially with the square of the driving force. These experimental results are attributed to statistical fluctuations of the density of the vortex line length. As a result, a normal probability distribution of is found having a standard deviation of and a spectral bandwidth .
- Received 30 October 2003
DOI:https://doi.org/10.1103/PhysRevLett.92.095301
©2004 American Physical Society