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EXPERIMENTAL INVESTIGATION OF CRYOGENIC TURBULENT RAYLEIGH-BENARD CONVECTION IN CYLINDRICAL ASPECT RATIO ONE CELL

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The heat transfer efficiency and statistical properties of turbulent Rayleigh-Bénard convective flow are investigated experimentally in a cylindrical cell of aspect ratio one. We discuss the role of boundary layers asymmetry on the studied convective flow for Rayleigh numbers 1e6 < Ra < 1e15 and statistical analysis of the RBC based on measurements of temperature fluctuations by small Ge sensors placed inside the cell interior. Resulting dependences of Nusselt and Reynolds numbers on Ra up to 1e15 are analyzed and compared to available experimental results for similar geometry.

Author(s):

Pavel Urban    
Institute of Scientific Instruments of the ASCR
Czech Republic

Pavel Hanzelka    
Institute of Scientific Instruments of the ASCR
Czech Republic

Marco La Mantia    
Faculty of Mathematics and Physics, Charles University
Czech Republic

Vera Musilova    
Institute of Scientific Instruments of the ASCR
Czech Republic

Tomas Kralik    
Institute of Scientific Instruments of the ASCR
Czech Republic

Ladislav Skrbek    
Faculty of Mathematics and Physics, Charles University
Czech Republic