Higher‐order‐accurate numerical method for temporal stability simulations of Rayleigh‐Bénard‐Poiseuille flows
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DOI: 10.1002/fld.4877
Abstract: For Rayleigh‐Bénard‐Poiseuille flows, thermal stratification resulting from a wall‐normal temperature gradient together with an opposing gravitational field can lead to buoyancy‐driven instability. Moreover, for sufficiently large Reynolds numbers, viscosity‐driven instability can occur. Two higher‐order‐accurate methods… read more here.
Keywords: rayleigh nard; order; order accurate; instability ... See more keywords
Effects of Rayleigh-Bénard convection on spectra of viscoplastic fluids
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DOI: 10.1016/j.ijheatmasstransfer.2019.118947
Abstract: Abstract Direct Numerical Simulations (DNS) have been conducted to analyse velocity and temperature spectra in unsteady three-dimensional Rayleigh-Benard convection (differentially heated horizontal walls, i.e. heated from below and cooled from above whereas the other walls… read more here.
Keywords: nominal rayleigh; rayleigh nard; effects rayleigh; convection ... See more keywords
Rayleigh-Bénard convection of Casson fluids
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DOI: 10.1016/j.ijthermalsci.2018.01.016
Abstract: Abstract This study aims at investigating numerically the Rayleigh-Benard Convection (RBC) in viscoplastic fluids. A Casson fluid is considered in a bidimensional square cavity heated from below. The effects of the dimensionless yield stress, the… read more here.
Keywords: rayleigh nard; convection; casson; number ... See more keywords
Oscillatory Rayleigh–Bénard Convection in elasto-viscoplastic gels
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DOI: 10.1016/j.jnnfm.2020.104428
Abstract: Abstract Rayleigh-Benard convection (RBC) is studied in an elasto-viscoplastic (EVP) gel, the widely used and studied Carbopol gel. The transition from conductive to convective regime is determined by the Schmidt-Milverton principle which leads to a… read more here.
Keywords: rayleigh nard; elasto viscoplastic; convection elasto; convection ... See more keywords
Spatio-temporal characterization of thermal fluctuations in a non-turbulent Rayleigh–Bénard convection at steady state
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DOI: 10.1016/j.physa.2019.123867
Abstract: In this paper we present a detailed description of the statistical and computational techniques that were employed to study a driven far-from-equilibrium steady-state Rayleigh-B{e}nard system in the non-turbulent regime ($Ra\leq 3500$). In our previous work… read more here.
Keywords: rayleigh nard; nard convection; state; steady state ... See more keywords
Thermal forcing and ‘classical’ and ‘ultimate’ regimes of Rayleigh–Bénard convection
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.118
Abstract: The fundamental challenge to characterize and quantify thermal transport in the strongly nonlinear regime of Rayleigh–Bénard convection – the buoyancy-driven flow of a horizontal layer of fluid heated from below – has perplexed the fluid… read more here.
Keywords: rayleigh nard; fluid; transport; convection ... See more keywords
Direct numerical simulations of Rayleigh–Bénard convection in water with non-Oberbeck–Boussinesq effects
Sign Up to like & getrecommendations! Published in 2019 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2019.787
Abstract: Rayleigh–Bénard convection in water is studied by means of direct numerical simulations, taking into account the variation of properties. The simulations considered a three-dimensional (3-D) cavity with a square cross-section and its two-dimensional (2-D) equivalent,… read more here.
Keywords: rayleigh nard; convection water; numerical simulations; oberbeck boussinesq ... See more keywords
Exact relations between Rayleigh–Bénard and rotating plane Couette flow in two dimensions
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2020.718
Abstract: Abstract Rayleigh–Bénard convection (RBC) and Taylor–Couette flow (TCF) are two paradigmatic fluid dynamical systems frequently discussed together because of their many similarities despite their different geometries and forcing. Often these analogies require approximations, but in… read more here.
Keywords: rayleigh nard; rotating plane; couette flow; plane couette ... See more keywords
Rayleigh–Bénard convection with an immersed floating body
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DOI: 10.1017/jfm.2023.1064
Abstract: Abstract The paper presents the results of an experimental and numerical study of turbulent thermal convection in a rectangular box containing an extended immersed free-floating plate. Varying the values of control parameters, such as Rayleigh… read more here.
Keywords: heat; plate; nard convection; rayleigh nard ... See more keywords
Vorticity skewness of finite-amplitude rapidly rotating Rayleigh–Bénard convection
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DOI: 10.1017/jfm.2024.571
Abstract: Abstract Rotating Rayleigh–Bénard convection denotes the convection between a warm plate and a cold plate in a rotating environment. It is a classic model for understanding convective vortices in the atmosphere and ocean. The influence… read more here.
Keywords: vorticity; vorticity skewness; rayleigh nard; convection ... See more keywords
Turbulent spherical Rayleigh–Bénard convection: radius ratio dependence
Sign Up to like & getrecommendations! Published in 2024 at "Journal of Fluid Mechanics"
DOI: 10.1017/jfm.2024.909
Abstract: Abstract Direct numerical simulation (DNS) is performed to explore turbulent Rayleigh–Bénard convection in spherical shells. Our simulations cover six distinct values of radius ratio, $\eta = r_i/r_o = 0.2$, 0.3, 0.4, 0.5, 0.6 and 0.8,… read more here.
Keywords: number; eta; nard convection; rayleigh nard ... See more keywords