Abstract
Measurements of the Nusselt number Nu and of a Reynolds number for Rayleigh-Bénard convection (RBC) over the Rayleigh-number range and for Prandtl numbers Pr near 0.8 are presented. The aspect ratio of a cylindrical sample was 0.50. For the data yielded with and with , consistent with classical turbulent RBC. After a transition region for , where multistability occurred, we found and , in agreement with the results of Grossmann and Lohse for the large-Ra asymptotic state with turbulent boundary layers which was first predicted by Kraichnan.
- Received 7 September 2011
DOI:https://doi.org/10.1103/PhysRevLett.108.024502
© 2012 American Physical Society
Viewpoint
The Twins of Turbulence Research
Published 9 January 2012
Two new experiments on fluid turbulence have attained conditions needed to establish asymptotic scalings for turbulent transports of heat and angular momentum.
See more in Physics