Heat transfer in cryogenic helium gas by turbulent Rayleigh-Bénard convection in a cylindrical cell of aspect ratio 1
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F14%3A00430597" target="_blank" >RIV/68081731:_____/14:00430597 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/1367-2630/16/5/053042" target="_blank" >http://dx.doi.org/10.1088/1367-2630/16/5/053042</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1367-2630/16/5/053042" target="_blank" >10.1088/1367-2630/16/5/053042</a>
Alternative languages
Result language
angličtina
Original language name
Heat transfer in cryogenic helium gas by turbulent Rayleigh-Bénard convection in a cylindrical cell of aspect ratio 1
Original language description
We present experimental results on the heat transfer efficiency of cryogenic turbulent Rayleigh-Benard convection (RBC) in a cylindrical cell 0.3 m in both diameter and height which has improvements with respect to various corrections connected with finite thermal conductivity of sidewalls and plates. The heat transfer efficiency described by the Nusselt number Nu = Nu(Ra, Pr) is investigated for the range of Rayleigh number 10(6) < Ra < 10(15), with the Prandtl number varying such that 0.7 <= Pr < 15,using cryogenic He-4 gas with well-known and in situ tunable properties as a working fluid. For 7.2 x 10(6) < Ra < 10(11) our data (both corrected and uncorrected) agree with suitably corrected data from similar cryogenic experiments and are consistent with Nu proportional to Ra-2/7. Up to Ra similar or equal to 10(12), our data could be treated as Oberbeck-Boussinesq data. For Ra > 10(12), the heat transfer efficiency becomes affected by non-Oberbeck-Boussinesq (NOB) effects, causing as
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
<a href="/en/project/GPP203%2F12%2FP897" target="_blank" >GPP203/12/P897: Cryogenic Rayleigh-Bénard convection at Rayleigh numbers above 1e11</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2014
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
New Journal of Physics
ISSN
1367-2630
e-ISSN
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Volume of the periodical
16
Issue of the periodical within the volume
5
Country of publishing house
DE - GERMANY
Number of pages
40
Pages from-to
"053042: 1"-"40"
UT code for WoS article
000338940400001
EID of the result in the Scopus database
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