0386094 - ÚPT 2013 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Králík, Tomáš - Urban, Pavel - Musilová, Věra - Hanzelka, Pavel - Srnka, Aleš - Repisky, Andrej
Cryogenic He experiment on Natural Turbulent Convection.
Cryogenics 2012. The 12th IIR International Conference Proceedings. Praha: Icaris Ltd, 2012, s. 402-406. ISBN 978-2-913149-93-9.
[Cryogenics 2012. The IIR International Conference /12./. Dresden (DE), 11.10.2012-14.10.2012]
Grant CEP: GA MŠMT ED0017/01/01; GA ČR GPP203/12/P897
Institucionální podpora: RVO:68081731
Klíčová slova: Cryogenic He experiment * narural turbulent convection
Kód oboru RIV: BK - Mechanika tekutin

Cryogenic helium gas is a suitable fluid for study of natural turbulent convection at very high Rayleigh numbers. We present experimental method and new result on Reynolds and Péclet numbers characterizing large scale circulation (LSC) of fluid at Rayleigh numbers within the range from 1011 to 1015. Observation of LSC is based on measurement of local temperature fluctuations of convecting helium. For experiments we used a specially designed cylindrical cell of height L = 0.3 m and diameter D = 0.3 m with minimized parasitic effects on studied convection, previously published on CryoPrague 2006 [1].
Trvalý link: http://hdl.handle.net/11104/0215522