Has the ultimate state of turbulent thermal convection been observed?

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081731%3A_____%2F15%3A00451313" target="_blank" >RIV/68081731:_____/15:00451313 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11320/15:10320078

Result on the web

<a href="http://dx.doi.org/10.1017/jfm.2015.638" target="_blank" >http://dx.doi.org/10.1017/jfm.2015.638</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1017/jfm.2015.638" target="_blank" >10.1017/jfm.2015.638</a>

Result language

angličtina

Original language name

Has the ultimate state of turbulent thermal convection been observed?

Original language description

An important question in turbulent Rayleigh–Bénard convection is the scaling of the Nusselt number with the Rayleigh number in the so-called ultimate state, corresponding to asymptotically high Rayleigh numbers. A related but separate question is whether the measurements support the so-called Kraichnan law, according to which the Nusselt number varies as the square root of the Rayleigh number (modulo a logarithmic factor). Although there have been claims that the Kraichnan regime has been observed in laboratory experiments with low aspect ratios, the totality of existing experimental results presents a conflicting picture in the high-Rayleigh-number regime. We analyse the experimental data to show that the claims on the ultimate state leave open an important consideration relating to non-Oberbeck–Boussinesq effects. Thus, the nature of scaling in the ultimate state of Rayleigh–Bénard convection remains open.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BK - Liquid mechanics

OECD FORD branch

—

Project

<a href="/en/project/GA14-02005S" target="_blank" >GA14-02005S: Cryogenic helium as a working fluid to study classical and quantum turbulence</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2015

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Fluid Mechanics

ISSN

0022-1120

e-ISSN

—

Volume of the periodical

785

Issue of the periodical within the volume

DEC

Country of publishing house

GB - UNITED KINGDOM

Number of pages

13

Pages from-to

270-282

UT code for WoS article

000365624100013

EID of the result in the Scopus database

2-s2.0-84947483948