Experimental determination of the 3-D characteristic modes of turbulent Rayleigh–Bénard convection in a cylinder

• Published in: Journal of fluid mechanics Vol. 922
• Main Authors: Paolillo, Gerardo, Greco, Carlo Salvatore, Astarita, Tommaso, Cardone, Gennaro
• Format: Journal Article
• Language: English
• Published: Cambridge, UK Cambridge University Press 10.09.2021
• Subjects: Analysis; Aspect ratio; Cell size; Cellular convection; Convection; Convection cells; Criteria; Cylinders; Diameters; Fluid dynamics; Fluid flow; Free convection; JFM Papers; Methods; Modes; Particle tracking; Particle tracking velocimetry; Proper Orthogonal Decomposition; Rayleigh number; Rayleigh-Benard convection; Working fluids; turbulent convection; Bénard convection

The present paper reports on a time-resolved three-dimensional experimental study of turbulent Rayleigh–Bénard convection inside a cylinder with one-half aspect ratio. The working fluid is water and the Rayleigh and Prandtl numbers are, respectively, $1.86\times 10^{8}$ and $7.6$. Measurements are c...