Results 21 to 30 of about 268,500 (212)
Heat transfer and large scale dynamics in turbulent Rayleigh-Bénard convection [PDF]
, 2008 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 ...
G. Ahlers, S. Grossmann, D. Lohse
semanticscholar +1 more source
Unsteady Flow and Mass Transfer Induced by Rayleigh-Bénard-Marangoni Convection. [PDF]
, 2023 Acknowledgements: The simulations were performed on the supercomputer bwUniCluster 2.0 supported by the state of Baden-Württemberg, Germany through bwHPC.Evaporative cooling at the water surface is usually modelled by imposing a constant heat flux at the
Wissink, J, Ali, F, Herlina, H
core +1 more source
Large-eddy simulation of Rayleigh-Benard convection at extreme Rayleigh numbers [PDF]
The Physics of Fluids, 2022 We adopt the stretched spiral vortex sub-grid model for large-eddy simulation (LES) of turbulent convection at extreme Rayleigh numbers. We simulate Rayleigh-Bénard convection (RBC) for Rayleigh numbers ranging from 106 to 1015 and for Prandtl numbers 0 ...
Roshan Samuel, R. Samtaney, M. Verma
semanticscholar +1 more source
Steady Rayleigh–Bénard convection between no-slip boundaries [PDF]
Journal of Fluid Mechanics, 2020 The central open question about Rayleigh–Bénard convection – buoyancy-driven flow in a fluid layer heated from below and cooled from above – is how vertical heat flux depends on the imposed temperature gradient in the strongly nonlinear regime where the ...
B. Wen, D. Goluskin, C. Doering
semanticscholar +1 more source
Nonlinear two-dimensional Rayleigh-Bénard convection [PDF]
, 2014 Two dimensional Rayleigh-Bénard convection in a Boussinesq fluid is the simplest possible system that exhibits convective instability. Moreover it contains the same basic physics as occurring in many geophysical and astrophysical systems, such as the ...
Hepworth, Benjamin James
core +6 more sources
Transition to the Ultimate Regime in Two-Dimensional Rayleigh-Bénard Convection. [PDF]
Physical Review Letters, 2018 The possible transition to the so-called ultimate regime, wherein both the bulk and the boundary layers are turbulent, has been an outstanding issue in thermal convection, since the seminal work by Kraichnan [Phys.
Xiaojue Zhu +4 more
semanticscholar +1 more source
From zonal flow to convection rolls in Rayleigh–Bénard convection with free-slip plates [PDF]
Journal of Fluid Mechanics, 2020 Rayleigh–Bénard (RB) convection with free-slip plates and horizontally periodic boundary conditions is investigated using direct numerical simulations. Two configurations are considered, one is two-dimensional (2-D) RB convection and the other one three ...
Qi Wang +4 more
semanticscholar +1 more source
Flow regimes of Rayleigh–Bénard convection in a vertical magnetic field [PDF]
Journal of Fluid Mechanics, 2020 The effects of a vertical static magnetic field on the flow structure and global transport properties of momentum and heat in liquid metal Rayleigh–Bénard convection are investigated.
Till Zürner +4 more
semanticscholar +1 more source
From Rayleigh–Bénard convection to porous-media convection: how porosity affects heat transfer and flow structure [PDF]
Journal of Fluid Mechanics, 2020 We perform a numerical study of the heat transfer and flow structure of Rayleigh–Bénard (RB) convection in (in most cases regular) porous media, which are comprised of circular, solid obstacles located on a square lattice.
Shuang Liu +8 more
semanticscholar +1 more source
Scaling in Rayleigh–Bénard convection
Journal of Fluid Mechanics, 2023 We consider the Nusselt–Rayleigh number problem of Rayleigh–Bénard convection and make the hypothesis that the velocity and thermal boundary layer widths, $\delta _u$ and $\delta _T$, in the absence of a strong mean flow are controlled by the dissipation
E. Lindborg
semanticscholar +1 more source