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Fluctuations and transport in a stirred fluid with a mean gradient

Gollub, J. P. and Clarke, J. and Gharib, M. and Lane, B. and Mesquita, O. N. (1991) Fluctuations and transport in a stirred fluid with a mean gradient. Physical Review Letters, 67 (25). pp. 3507-3510. ISSN 0031-9007. https://resolver.caltech.edu/CaltechAUTHORS:20130913-105647709

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Abstract

The effective thermal diffusivity D* 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 D* 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.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1103/PhysRevLett.67.3507 DOIArticle
http://link.aps.org/doi/10.1103/PhysRevLett.67.3507PublisherArticle
Additional Information:© 1991 The American Physical Society. Received 18 September 1991. The authors thank B. Shraiman and E. Siggia for suggesting this experiment and for helpful discussions. We also appreciate discussions with R. Kraichnan and Z.-S. She. S. Gaudio built the apparatus. The research was supported by DARPA/URI under Contracts No. N000-14-86-K-0758 and No. N00015-85-K-0759. O.N. M. acknowledges partial support from the Brazilian agency Conselho Nacional de Desenvolvimento Cientifico e Tecnologico.
Group:GALCIT
Funders:
Funding AgencyGrant Number
DARPA/URIN000-14-86-K-0758
DARPA/URIN00015-85-K-0759
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) (Brazil)UNSPECIFIED
Issue or Number:25
Record Number:CaltechAUTHORS:20130913-105647709
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20130913-105647709
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:41320
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:16 Sep 2013 21:11
Last Modified:03 Oct 2019 05:47

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