000014515 001__ 14515
000014515 005__ 20161115100154.0
000014515 04107 $$aeng
000014515 046__ $$k2016-08-21
000014515 100__ $$aChong, Kai, Leong
000014515 24500 $$aEffect of confinement on global heat transfer scaling in Rayleigh-Bénard convection

000014515 24630 $$n24.$$p24th International Congress of Theoretical and Applied Mechanics - Book of Papers
000014515 260__ $$bInternational Union of Theoretical and Applied Mechanics, 2016
000014515 506__ $$arestricted
000014515 520__ $$2eng$$aWe present the results from direct numerical simulations of Rayleigh-B´enard (RB) convection of Rayleigh number 106 ≤ Ra ≤ 1010 , Prandtl number 4.38 and width-to-height aspect ratio 1/32 ≤ Γ ≤ 1. Our results suggest that the power law is more rational to be fitted conditionally according to the three regimes classified by Chong et al.[1] as they are under different physical mechanisms on heat transfer. For instance, in regime II heat transport is accomplished by a single, or a few, system-sized plume(s), whereas in regime I it is carried out by fragmented plumes. Therefore, in contrast to RB flow at Γ = 1 (in the explored Ra range), there is no pure power-law scaling between Nusselt number N u and Ra whenever the convective state straddles over different regimes.

000014515 540__ $$aText je chráněný podle autorského zákona č. 121/2000 Sb.
000014515 653__ $$a

000014515 7112_ $$a24th International Congress of Theoretical and Applied Mechanics$$cMontreal (CA)$$d2016-08-21 / 2016-08-26$$gICTAM2016
000014515 720__ $$aChong, Kai, Leong
000014515 8560_ $$ffischerc@itam.cas.cz
000014515 8564_ $$s88708$$uhttps://invenio.itam.cas.cz/record/14515/files/TS.FM05-3.03.pdf$$yOriginal version of the author's contribution as presented on CD,  page 734, code TS.FM05-3.03
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000014515 962__ $$r13812
000014515 980__ $$aPAPER