Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10130953" target="_blank" >RIV/00216208:11320/12:10130953 - isvavai.cz</a>
Alternative codes found
RIV/68081731:_____/12:00383815
Result on the web
<a href="http://dx.doi.org/10.1103/PhysRevLett.109.154301" target="_blank" >http://dx.doi.org/10.1103/PhysRevLett.109.154301</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevLett.109.154301" target="_blank" >10.1103/PhysRevLett.109.154301</a>
Alternative languages
Result language
angličtina
Original language name
Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers
Original language description
The heat transfer efficiency in turbulent Rayleigh-Benard convection is investigated experimentally, in a cylindrical cell of height 0.3 m, diameter 0.3 m. We show that for Rayleigh numbers 10(12) less than or similar to Ra less than or similar to 10(15)the Nusselt number closely follows Nu proportional to Ra-1/3 if the mean temperature of the working fluid-cryogenic helium gas-is measured by small sensors directly inside the cell at about half of its height. In contrast, if the mean temperature is determined in a conventional way, as an arithmetic mean of the bottom and top plate temperatures, the Nu(Ra) proportional to Ra-gamma displays spurious crossover to higher gamma that might be misinterpreted as a transition to the ultimate Kraichnan regime.
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BK - Liquid mechanics
OECD FORD branch
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Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2012
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physical Review Letters
ISSN
0031-9007
e-ISSN
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Volume of the periodical
109
Issue of the periodical within the volume
15
Country of publishing house
US - UNITED STATES
Number of pages
4
Pages from-to
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UT code for WoS article
000309590300019
EID of the result in the Scopus database
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