Large scale dynamics in turbulent Rayleigh-Benard convection
Guenter Ahlers, Siegfried Grossmann, Detlef Lohse
TL;DR
This review summarizes recent advances in understanding turbulent Rayleigh-Benard convection, focusing on how key dimensionless numbers and boundary layer thicknesses scale with system parameters, and discusses complex effects and future research challenges.
Contribution
It provides a comprehensive overview of the scaling laws and dynamics in turbulent Rayleigh-Benard convection, highlighting recent experimental and theoretical progress.
Findings
Nu and Re depend on Ra and Pr
Boundary layer thicknesses scale with Ra and Pr
Non-Oberbeck-Boussinesq effects influence flow dynamics
Abstract
The progress in our understanding of several aspects of turbulent Rayleigh-Benard convection is reviewed. The focus is on the question of how the Nusselt number and the Reynolds number depend on the Rayleigh number Ra and the Prandtl number Pr, and on how the thicknesses of the thermal and the kinetic boundary layers scale with Ra and Pr. Non-Oberbeck-Boussinesq effects and the dynamics of the large-scale convection-roll are addressed as well. The review ends with a list of challenges for future research on the turbulent Rayleigh-Benard system.
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