Abstract
The effective thermal diffusivity and the probability distribution of temperature fluctuations are measured in a stirred fluid across which a temperature gradient is maintained. A distinct mixing transition is observed for as a function of Reynolds number R. Above the transitions, the distribution is strongly non-Gaussian and approaches an exponential exp(-‖δT‖/βξ), where β is the local temperature gradient and ξ the correlation length.
- Received 18 September 1991
DOI:https://doi.org/10.1103/PhysRevLett.67.3507
©1991 American Physical Society