Rayleigh-Bénard convection, the buoyancy-driven flow induced by temperature gradients parallel to the gravity, is relevant to a variety of processes spontaneously occurring in nature or used in technological applications. Understanding of its inherent chaotic evolution is possible only through measurement techniques that allow to access the unsteady, three-dimensional behavior of all the thermo-fluid dynamic quantities of the flow. This work presents full-field and time-resolved tomographic particle image velocimetry measurements of non-rotating and rotating Rayleigh-Bénard convection inside a slender cylinder with aspect ratio equal to 1/2 at Rayleigh and Prandtl numbers equal to 1.86 × 10^8 and 7.6.
Full-field and time-resolved tomographic PIV of turbulent thermal convection inside a cylinder / Paolillo, Gerardo; Greco, CARLO SALVATORE; Astarita, Tommaso; Cardone, Gennaro. - (2019). (Intervento presentato al convegno 15th International Conference on Fluid Control, Measurements and Visualization tenutosi a Naples (Italy) nel May 27-30).
Full-field and time-resolved tomographic PIV of turbulent thermal convection inside a cylinder
Gerardo Paolillo;Carlo Salvatore Greco;Tommaso Astarita;Gennaro Cardone
2019
Abstract
Rayleigh-Bénard convection, the buoyancy-driven flow induced by temperature gradients parallel to the gravity, is relevant to a variety of processes spontaneously occurring in nature or used in technological applications. Understanding of its inherent chaotic evolution is possible only through measurement techniques that allow to access the unsteady, three-dimensional behavior of all the thermo-fluid dynamic quantities of the flow. This work presents full-field and time-resolved tomographic particle image velocimetry measurements of non-rotating and rotating Rayleigh-Bénard convection inside a slender cylinder with aspect ratio equal to 1/2 at Rayleigh and Prandtl numbers equal to 1.86 × 10^8 and 7.6.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.