Turbulent superstructures in Rayleigh-Bénard convection [PDF]
Nature Communications, 2018 Turbulent fluids in nature, counter-intuitively, can exhibit large-scale order that persists for long times. Pandey et al. numerically characterize the formation of these superstructures in turbulent convection by separating the fast motions at small ...
Ambrish Pandey +2 more
doaj +4 more sources
Force balance in rapidly rotating Rayleigh-Bénard convection. [PDF]
J Fluid Mech, 2021 The force balance of rotating Rayleigh–Bénard convection regimes is investigated using direct numerical simulation on a laterally periodic domain, vertically bounded by no-slip walls.
Guzmán AJA +5 more
europepmc +2 more sources
Controlling Rayleigh–Bénard convection via reinforcement learning [PDF]
Journal of Turbulence, 2020 Thermal convection is ubiquitous in nature as well as in many industrial applications. The identification of effective control strategies to, e.g. suppress or enhance the convective heat exchange under fixed external thermal gradients is an outstanding ...
Federico Toschi +2 more
exaly +2 more sources
Rayleigh-Bénard convection: The container shape matters
Physical Review Fluids, 2021 In an effort to achieve very large Rayleigh numbers when studying turbulence on a Rayleigh--Baposenard configuration, one can carry out simulations and experiments in as high convection cells as possible which involves using convection cells with the ...
Olga Shishkina
exaly +2 more sources
Diffusion‐Free Scaling in Rotating Spherical Rayleigh‐Bénard Convection [PDF]
Geophysical Research Letters, 2021 Direct numerical simulations are employed to reveal three distinctly different flow regions in rotating spherical Rayleigh‐Bénard convection. In the high‐latitude region I vertical (parallel to the axis of rotation) convective columns are generated ...
Guiquan Wang +4 more
doaj +2 more sources
Thermodynamic Analysis of Bistability in Rayleigh–Bénard Convection [PDF]
Entropy, 2020 Bistability is often encountered in association with dissipative systems far from equilibrium, such as biological, physical, and chemical phenomena.
Takahiko Ban
doaj +2 more sources
Scaling Laws in Rayleigh‐Bénard Convection
Earth and Space Science, 2019 The heat transfer scaling theories for Rayleigh‐Bénard convection (RBC) are reviewed and discussed for configurations with and without rotation and magnetic fields.
Meredith Plumley, Keith Julien
doaj +2 more sources
Comparison of computational codes for direct numerical simulations of turbulent Rayleigh–Bénard convection [PDF]
Computers and Fluids, 2018 Computational codes for direct numerical simulations of Rayleigh–Benard (RB) convection are compared in terms of computational cost and quality of the solution. As a benchmark case, RB convection at Ra = 10 8 and Pr = 1 in a periodic domain, in cubic and
Richard J.A.M. Stevens +2 more
exaly +2 more sources
Effective control of two-dimensional Rayleigh-Bénard convection: invariant multi-agent reinforcement learning is all you need [PDF]
The Physics of Fluids, 2023 Rayleigh–Bénard convection (RBC) is a recurrent phenomenon in a number of industrial and geoscience flows and a well-studied system from a fundamental fluid-mechanics viewpoint.
Colin Vignon +5 more
semanticscholar +1 more source
Direct data-driven forecast of local turbulent heat flux in Rayleigh-Bénard convection [PDF]
The Physics of Fluids, 2022 A combined convolutional autoencoder–recurrent neural network machine learning model is presented to directly analyze and forecast the dynamics and low-order statistics of the local convective heat flux field in a two-dimensional turbulent Rayleigh ...
S. Pandey +3 more
semanticscholar +1 more source