Lagrangian Rayleigh-Bénard convection: a theoretical study
Sergio Chibbaro
(Institut Jean Le Rond d’Alembert, Université Pierre et Marie Curie, Paris 6)
| When |
Jan 20, 2015
from 10:45 to 12:00 |
|---|---|
| Where | Centre Blaise Pascal |
| Attendees |
Sergio Chibbaro |
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Using passive tracers as sensors, we obtain Lagrangian measurements of tracers position, velocity and temperature in Rayleigh-Bénard convection at Ra ~ 107-109. We report on statistics of temperature, velocity, and heat transport (Nusselt number). We observe that the Nusselt number is characterized by a largely intermittent behavior, likely due to the interaction of temperature with turbulent velocity fluctuations.