354 citations · 5.2k across the 75 of their papers we have counts for
12 papers · 1 filter
Spatial distribution of heat flux and fluctuations in turbulent Rayleigh-Bénard convection
Rajaram Lakkaraju, Richard. J. A. M. Stevens, Roberto Verzicco +4
We numerically investigate the radial dependence of the velocity and temperature fluctuations and of the time-averaged heat flux in a cylindrical Rayleigh-Bénard cell…
Breakdown of the large-scale wind in Γ=1/2 rotating Rayleigh-Bénard flow
Richard J. A. M. Stevens, Herman J. H. Clercx, Detlef Lohse
Experiments and simulations of rotating Rayleigh-Bénard convection in cylindrical samples have revealed an increase in heat transport with increasing rotation rate. This heat trans…
Thermal boundary layer profiles in turbulent Rayleigh-Bénard convection in a cylindrical sample
Richard J. A. M. Stevens, Quan Zhou, Siegfried Grossmann +3
We numerically investigate the structures of the near-plate temperature profiles close to the bottom and top plates of turbulent Rayleigh-Bénard flow in a cylindrical sample at Ray…
Horizontal Structures of Velocity and Temperature Boundary Layers in 2D Numerical Turbulent Rayleigh-Bénard Convection
Quan Zhou, Kazuyasu Sugiyama, Richard J. A. M. Stevens +3
We investigate the structures of the near-plate velocity and temperature profiles at different horizontal positions along the conducting bottom (and top) plate of a Rayleigh-Bénard…
Boundary layer structure in turbulent thermal convection and its consequences for the required numerical resolution
Olga Shishkina, Richard J. A. M. Stevens, Siegfried Grossmann +1
Results on the Prandtl-Blasius type kinetic and thermal boundary layer thicknesses in turbulent Rayleigh-Bénard convection in a broad range of Prandtl numbers are presented. By sol…
Finite-size effects lead to supercritical bifurcations in turbulent rotating Rayleigh-Bénard convection
Stephan Weiss, Richard J. A. M. Stevens, Jin-Qiang Zhong +3
In turbulent thermal convection in cylindrical samples of aspect ratio Γ= D/L (D is the diameter and L the height) the Nusselt number Nu is enhanced when the sample is rotated abou…
Flow reversals in thermally driven turbulence
Kazuyasu Sugiyama, Rui Ni, Richard J. A. M. Stevens +7
We analyze the reversals of the large scale flow in Rayleigh-Bénard convection both through particle image velocimetry flow visualization and direct numerical simulations (DNS) of…
The role of Stewartson and Ekman layers in turbulent rotating Rayleigh-Bénard convection
Rudie P. J. Kunnen, Richard J. A. M. Stevens, Jim Overkamp +3
When the classical Rayleigh-Bénard (RB) system is rotated about its vertical axis roughly three regimes can be identified. In regime I (weak rotation) the large scale circulation (…
Effect of aspect-ratio on vortex distribution and heat transfer in rotating Rayleigh-Bénard convection
Richard J. A. M. Stevens, Jim Overkamp, Detlef Lohse +1
Numerical and experimental data for the heat transfer as function of the Rossby number Ro in turbulent rotating Rayleigh-Bénard convection are presented for Prandtl number Pr=4.38…
Connecting flow structures and heat flux in turbulent Rayleigh-Bénard convection
Erwin P. van der Poel, Richard J. A. M. Stevens, Detlef Lohse
The aspect ratio (Γ) dependence of the heat transfer (Nusselt number Nu in dimensionless form) in turbulent (two-dimensional) Rayleigh-Bénard convection is numerically studied in t…
Effect of Plumes on Measuring the Large Scale Circulation in Turbulent Rayleigh-Bénard Convection
Richard J. A. M. Stevens, Herman J. H. Clercx, Detlef Lohse
We studied the properties of the large-scale circulation (LSC) in turbulent Rayleigh-Bénard (RB) convection by using results from direct numerical simulations in which we placed a…
Prandtl and Rayleigh number dependence of heat transport in high Rayleigh number thermal convection
Richard J. A. M. Stevens, Detlef Lohse, Roberto Verzicco
Results from direct numerical simulation for three-dimensional Rayleigh-Bénard convection in samples of aspect ratio and up to Rayleigh number …