Results 21 to 30 of about 35,832 (271)
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
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
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 ...
Baole Wen, D. Goluskin, C. Doering
semanticscholar +1 more source
Rayleigh-Bénard convection with magnetic field [PDF]
Theoretical and Applied Mechanics, 2003 We discuss the solution of the small perturbation equations for a horizontal fluid layer heated from below with an applied magnetic field either in vertical or in horizontal direction. The magnetic field stabilizes, due to the Lorentz force, more or less
Zierep Jürgen
doaj +1 more source
Marginal Stability of Oscillatory Bénard-Marangoni Convection With Internal Heat Generation
Journal of Computing Research and Innovation, 2023 The onset of oscillatory Benard-Marangoni convection in a horizontal fluid layer with internal heat generation and a deformable free surface is studied using an analytical technique employing the classical linear stability theory.
Mohamad Najib Mohamad Fadzil +1 more
doaj +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
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
Stability for Rayleigh–Benard Convective Solutions of the Boltzmann Equation [PDF]
Archive for Rational Mechanics and Analysis, 2010 We consider the Boltzmann equation for a gas in a horizontal slab, subject to a gravitational force. The boundary conditions are of diffusive type, specifying the wall temperatures, so that the top temperature is lower than the bottom one (Benard setup). We consider a 2-dimensional convective stationary solution, which is close for small Knudsen number
Arkeryd, A +3 more
openaire +4 more sources
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