The large-scale circulation dynamics in rotating Rayleigh-Benard convection (INVITED)
Abstract eng: In this talk I will present new experimental measurements of the large-scale circulation (LSC) dynamics in rotating Rayleigh-Bénard convection. In cylindrical samples we probe the angular orientation ș and the flow strength į of the LSC, through measurements of the azimuthal fluid temperature profile. We report linear retrograde precession of ș driven by constant Coriolis force in an unprecedented large Rossby number range (10İRoİ314). Enhanced precession speed is observed when Roı70 that is ascribed to stochastic cessation dynamics. A New oscillatory state of the LSC appears when the flow is subjected to modulated rotations. Both ș and į exhibit periodic oscillations in the modulation frequency. We present a LSC model that predicts accurately the oscillation amplitudes and phases.
Publisher:
International Union of Theoretical and Applied Mechanics, 2016
Conference Title:
Conference Title:
24th International Congress of Theoretical and Applied Mechanics
Conference Venue:
Montreal (CA)
Conference Dates:
2016-08-21 / 2016-08-26
Rights:
Text je chráněný podle autorského zákona č. 121/2000 Sb.
Record appears in:
Record created 2016-11-15, last modified 2016-11-15
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