Higher‐order‐accurate numerical method for temporal stability simulations of Rayleigh‐Bénard‐Poiseuille flows
Sign Up to like & getrecommendations! Published in 2020 at "International Journal for Numerical Methods in Fluids"
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
Sign Up to like & getrecommendations! Published in 2020 at "International Journal of Heat and Mass Transfer"
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
Sign Up to like & getrecommendations! Published in 2018 at "International Journal of Thermal Sciences"
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
Sign Up to like & getrecommendations! Published in 2020 at "Journal of Non-newtonian Fluid Mechanics"
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
Sign Up to like & getrecommendations! Published in 2020 at "Physica A: Statistical Mechanics and its Applications"
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
Linear Rayleigh–Bénard stability of a transversely isotropic fluid
Sign Up to like & getrecommendations! Published in 2018 at "European Journal of Applied Mathematics"
DOI: 10.1017/s0956792518000359
Abstract: Suspended fibres significantly alter fluid rheology, as exhibited in for example solutions of DNA, RNA and synthetic biological nanofibres. It is of interest to determine how this altered rheology affects flow stability. Motivated by the… read more here.
Keywords: rayleigh nard; stability; rheology; isotropic fluid ... See more keywords
Turbulent superstructures in Rayleigh-Bénard convection
Sign Up to like & getrecommendations! Published in 2018 at "Nature Communications"
DOI: 10.1038/s41467-018-04478-0
Abstract: Turbulent Rayleigh-Bénard convection displays a large-scale order in the form of rolls and cells on lengths larger than the layer height once the fluctuations of temperature and velocity are removed. These turbulent superstructures are reminiscent… read more here.
Keywords: large scale; rayleigh nard; superstructures rayleigh; convection ... See more keywords
A Rayleigh-Bénard convection instability analog in vibrated gas-fluidized granular particles.
Sign Up to like & getrecommendations! Published in 2022 at "Soft matter"
DOI: 10.1039/d1sm01803e
Abstract: Granular particles subject to both vertical gas flow and vertical vibration are shown experimentally to exhibit structured convection cells in a densely packed yet fluidized state without gas voids traveling through the particles. Continuum gas-granular… read more here.
Keywords: gas; convection; convection instability; rayleigh nard ... See more keywords