Thermal radiation in Rayleigh-Benard convection experiments
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F20%3A00525160" target="_blank" >RIV/68081731:_____/20:00525160 - isvavai.cz</a>
Alternative codes found
RIV/00216208:11320/20:10424145
Result on the web
<a href="https://journals.aps.org/pre/abstract/10.1103/PhysRevE.101.043106" target="_blank" >https://journals.aps.org/pre/abstract/10.1103/PhysRevE.101.043106</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1103/PhysRevE.101.043106" target="_blank" >10.1103/PhysRevE.101.043106</a>
Alternative languages
Result language
angličtina
Original language name
Thermal radiation in Rayleigh-Benard convection experiments
Original language description
An important question in turbulent Rayleigh-Benard convection (RBC) is the effectiveness of convective heat transport, which is conveniently described via the scaling of the Nusselt number (Nu) with the Rayleigh (Ra) and Prandtl (Pr) numbers. In RBC experiments, the heat supplied to the bottom plate is also partly transferred by thermal radiation. This heat transport channel, acting in parallel with the convective and conductive heat transport channels, is usually considered insignificant and thus neglected. Here we present a detailed analysis of conventional far-field as well as strongly enhanced near-field radiative heat transport occurring in various RBC experiments. A careful inclusion of the radiative transport appreciably changes the Nu = Nu(Ra) scaling inferred in turbulent RBC experiments near ambient temperature utilizing gaseous nitrogen and sulfur hexafluoride as working fluids. On the other hand, neither the conventional far-field radiation nor the strongly enhanced near-field radiative heat transport appreciably affects the heat transport law deduced in cryogenic helium RBC experiments.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
<a href="/en/project/GA20-00918S" target="_blank" >GA20-00918S: Interplay of convective heat transfer and turbulent flows with rotation in classical and quantum phases of cryogenic helium</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2020
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 E
ISSN
2470-0045
e-ISSN
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Volume of the periodical
101
Issue of the periodical within the volume
4
Country of publishing house
US - UNITED STATES
Number of pages
9
Pages from-to
043106
UT code for WoS article
000527130200003
EID of the result in the Scopus database
2-s2.0-85084548902