Logarithmic Temperature Profiles in Turbulent Rayleigh-Benard Convection
Identifieur interne : 000759 ( Main/Exploration ); précédent : 000758; suivant : 000760Logarithmic Temperature Profiles in Turbulent Rayleigh-Benard Convection
Auteurs : Guenter Ahlers [États-Unis] ; Eberhard Bodenschatz [Allemagne] ; Denis Funfschilling [France] ; Siegfried Grossmann [Allemagne] ; Xiaozhou He [Allemagne] ; Detlef Lohse [Pays-Bas] ; Richard Stevens [Pays-Bas] ; Roberto Verzicco [Pays-Bas]Source :
- Physical Review Letters [ 0031-9007 ] ; 2012-09-14.
English descriptors
- mix :
Abstract
We report results for the temperature profiles of turbulent Rayleigh-Benard convection (RBC) in the interior of a cylindrical sample of aspect ratio Gamma equivalent to D/L = 0.50 (D and L are the diameter and height, respectively). Both in the classical and in the ultimate state of RBC we find that the temperature varies as A X ln(z/L) + B, where z is the distance from the bottom or top plate. In the classical state, the coefficient A decreases in the radial direction as the distance from the side wall increases. For the ultimate state, the radial dependence of A has not yet been determined. These findings are based on experimental measurements over the Rayleigh-number range 4 X 10(12) less than or similar to Ra less than or similar to 10(15) for a Prandtl number Pr similar or equal to 0.8 and on direct numerical simulation at Ra = 2 X 10(12), 2 X 10(11), and 2 X 10(10), all for Pr = 0.7.
Url:
DOI: 10.1103/PhysRevLett.109.114501
Affiliations:
- Allemagne, France, Pays-Bas, États-Unis
- Grand Est, Lorraine (région), Overijssel
- Enschede, Metz, Nancy
- Université de Lorraine, Université de Twente
Links toward previous steps (curation, corpus...)
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- to stream Hal, to step Checkpoint: 000704
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Le document en format XML
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<front><div type="abstract" xml:lang="en">We report results for the temperature profiles of turbulent Rayleigh-Benard convection (RBC) in the interior of a cylindrical sample of aspect ratio Gamma equivalent to D/L = 0.50 (D and L are the diameter and height, respectively). Both in the classical and in the ultimate state of RBC we find that the temperature varies as A X ln(z/L) + B, where z is the distance from the bottom or top plate. In the classical state, the coefficient A decreases in the radial direction as the distance from the side wall increases. For the ultimate state, the radial dependence of A has not yet been determined. These findings are based on experimental measurements over the Rayleigh-number range 4 X 10(12) less than or similar to Ra less than or similar to 10(15) for a Prandtl number Pr similar or equal to 0.8 and on direct numerical simulation at Ra = 2 X 10(12), 2 X 10(11), and 2 X 10(10), all for Pr = 0.7.</div>
</front>
</TEI>
<affiliations><list><country><li>Allemagne</li>
<li>France</li>
<li>Pays-Bas</li>
<li>États-Unis</li>
</country>
<region><li>Grand Est</li>
<li>Lorraine (région)</li>
<li>Overijssel</li>
</region>
<settlement><li>Enschede</li>
<li>Metz</li>
<li>Nancy</li>
</settlement>
<orgName><li>Université de Lorraine</li>
<li>Université de Twente</li>
</orgName>
</list>
<tree><country name="États-Unis"><noRegion><name sortKey="Ahlers, Guenter" sort="Ahlers, Guenter" uniqKey="Ahlers G" first="Guenter" last="Ahlers">Guenter Ahlers</name>
</noRegion>
</country>
<country name="Allemagne"><noRegion><name sortKey="Bodenschatz, Eberhard" sort="Bodenschatz, Eberhard" uniqKey="Bodenschatz E" first="Eberhard" last="Bodenschatz">Eberhard Bodenschatz</name>
</noRegion>
<name sortKey="Grossmann, Siegfried" sort="Grossmann, Siegfried" uniqKey="Grossmann S" first="Siegfried" last="Grossmann">Siegfried Grossmann</name>
<name sortKey="He, Xiaozhou" sort="He, Xiaozhou" uniqKey="He X" first="Xiaozhou" last="He">Xiaozhou He</name>
</country>
<country name="France"><region name="Grand Est"><name sortKey="Funfschilling, Denis" sort="Funfschilling, Denis" uniqKey="Funfschilling D" first="Denis" last="Funfschilling">Denis Funfschilling</name>
</region>
</country>
<country name="Pays-Bas"><region name="Overijssel"><name sortKey="Lohse, Detlef" sort="Lohse, Detlef" uniqKey="Lohse D" first="Detlef" last="Lohse">Detlef Lohse</name>
</region>
<name sortKey="Stevens, Richard" sort="Stevens, Richard" uniqKey="Stevens R" first="Richard" last="Stevens">Richard Stevens</name>
<name sortKey="Verzicco, Roberto" sort="Verzicco, Roberto" uniqKey="Verzicco R" first="Roberto" last="Verzicco">Roberto Verzicco</name>
</country>
</tree>
</affiliations>
</record>
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