Origin of the Temperature Oscillation in Turbulent Thermal Convection

Abstract

We report an experimental study of the three-dimensional spatial structure of the low frequency temperature oscillations in a cylindrical Rayleigh-Bénard convection cell. It is found that thermal plumes are not emitted periodically, but randomly and continuously, from the top and bottom plates. We further found that the oscillation of the temperature field does not originate from the boundary layers, but rather is a result of the horizontal motion of the hot ascending and cold descending fluids being modulated by the twisting and sloshing motion of the bulk flow field.

arXiv comment5 figures

References in corpus (6)

• Rotations and cessations of the large-scale circulation in turbulent Rayleigh-Benard convection
• Plume motion and large-scale circulation in a cylindrical Rayleigh-Bénard cell
• High Rayleigh number turbulent convection in a gas near the gas-liquid critical point
• Absense of slow transients, and the effect of imperfect vertical alignment, in turbulent Rayleigh-Benard convection
• A model of diffusion in a potential well for the dynamics of the large-scale circulation in turbulent Rayleigh-Benard convection
• Measured oscillations of the velocity and temperature fields in turbulent Rayleigh-Bénard convection in a rectangular cell

Cited by in corpus (34)

• Large scale dynamics in turbulent Rayleigh-Benard convection
• Flow reversals in thermally driven turbulence
• The cause of oscillations of the large-scale circulation of turbulent Rayleigh-B{é}nard convection
• Turbulent thermal convection over rough plates with varying roughness geometries
• Oscillations of the large-scale circulation in turbulent Rayleigh-Bénard convection: the off-center mode and its relationship with the torsional mode
• Prandtl-Blasius temperature and velocity boundary layer profiles in turbulent Rayleigh-Bénard convection
• Jump Rope Vortex in Liquid Metal Convection
• Combined measurement of velocity and temperature in liquid metal convection
• Elliptical Instability and Multi-Roll Flow Modes of the Large-scale Circulation in Confined Turbulent Rayleigh-Bénard Convection
• Flow regimes of Rayleigh-Bénard convection in a vertical magnetic field
• Inclined turbulent thermal convection in liquid sodium
• Thermal boundary layer profiles in turbulent Rayleigh-Bénard convection in a cylindrical sample
• A low-dimensional model predicting geometry-dependent dynamics of large-scale coherent structures in turbulence
• Effect of tilting on turbulent convection: Cylindrical samples with aspect ratio $\Gamma =0.50$
• Tristable flow states and reversal of the large-scale circulation in two-dimensional circular convection cells
• Experimental Investigation of Longitudinal Space-Time Correlations of the Velocity Field in Turbulent Rayleigh-Bénard Convection
• Effect of Plumes on Measuring the Large Scale Circulation in Turbulent Rayleigh-Bénard Convection
• Rare fluctuations and large-scale circulation cessations in turbulent convection
• Robustness of heat-transfer in confined inclined convection at high-Prandtl-number
• Breakdown of the large-scale wind in Γ=1/2 rotating Rayleigh-Bénard flow
• Heat transfer enhancement in Rayleigh-Bénard convection using a single passive barrier
• Recurrent bursts via linear processes in turbulent environments
• Transition phenomena in unstably stratified turbulent flows
• Dynamics and Statistics of Reorientations of Large-Scale Circulation in Turbulent Rotating Rayleigh-Bénard Convection
• Low-dimensional model of the large-scale circulation of turbulent Rayleigh-B{é}nard convection in a cubic container
• Enhanced azimuthal rotation of the large-scale flow through stochastic cessations in turbulent rotating convection with large Rossby numbers
• Effects of tilt on the orientation dynamics of the large-scale circulation in turbulent Rayleigh-B{é}nard convection
• Effect of weak rotation on large-scale circulation cessations in turbulent convection
• Synchronizing the helicity of Rayleigh-Bénard convection by a tide-like electromagnetic forcing
• Statistics and scaling properties of temperature field in symmetrical non-Oberbeck-Boussinesq turbulent convection
• Thermoelectric Precession in Turbulent Magnetoconvection
• The multi-scale nature of Wall shear stress fluctuations in turbulent Rayleigh-Benard convection
• Oscillation in the temperature profile of the large-scale circulation of turbulent convection induced by a cubic container
• Jump rope vortex flow in liquid metal Rayleigh-Bénard convection in a cuboid container of aspect ratio five