About: Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
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. 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. (en)
Title	Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers (en)
skos:prefLabel	Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers (en)
skos:notation	RIV/68081731:_____/12:00383815!RIV13-GA0-68081731
http://linked.open...avai/predkladatel	Ústav přístrojové techniky AV ČR, v. v. i.
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(ED0017/01/01), P(GA202/08/0276), P(GPP203/12/P897)
http://linked.open...iv/cisloPeriodika	15
http://linked.open...vai/riv/dodaniDat	2013
http://linked.open...aciTvurceVysledku	Hanzelka, Pavel Srnka, Aleš Musilová, Věra Králík, Tomáš Urban, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav přístrojové techniky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	132949
http://linked.open...ai/riv/idVysledku	RIV/68081731:_____/12:00383815
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	thermal-convection (en)
http://linked.open.../riv/klicoveSlovo	thermal-convection
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[A688175FA47A]
http://linked.open...i/riv/nazevZdroje	Physical Review Letters
http://linked.open...in/vavai/riv/obor	BK
http://linked.open...ichTvurcuVysledku	5 (xsd:int)
http://linked.open...cetTvurcuVysledku	6 (xsd:int)
http://linked.open...vavai/riv/projekt	APPLICATION LABORATORIES OF ADVANCED MICROTECHNOLOGIES AND NANOTECHNOLOGIES Cryogenic Rayleigh-Bénard convection at Rayleigh numbers above 1e11 Selected problems of cryogenic fluid dynamics
http://linked.open...UplatneniVysledku	2012
http://linked.open...v/svazekPeriodika	109
http://linked.open...iv/tvurceVysledku	Hanzelka, Pavel Králík, Tomáš Musilová, Věra Skrbek, L. Srnka, Aleš Urban, Pavel
http://linked.open...ain/vavai/riv/wos	000309590300019
issn	0031-9007
number of pages	4 (xsd:int)
http://bibframe.org/vocab/doi	10.1103/PhysRevLett.109.154301
is http://linked.open...avai/riv/vysledek of	Effect of Boundary Layers Asymmetry on Heat Transfer Efficiency in Turbulent Rayleigh-Bernard Convection at Very High Rayleigh Numbers

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