Low-Prandtl-number effects on global and local statistics in two-dimensional Rayleigh–Bénard convection

Y Zhang, Q Zhou - Physics of Fluids, 2024 - pubs.aip.org
We present global and local statistical properties of turbulent Rayleigh–Bénard (RB)
convection at low Prandtl numbers in this work. A series of high resolution two-dimensional …

Predictions of Reynolds and Nusselt numbers in turbulent convection using machine-learning models

S Bhattacharya, MK Verma, A Bhattacharya - Physics of Fluids, 2022 - pubs.aip.org
In this paper, we develop a multivariate regression model and a neural network model to
predict the Reynolds number (Re) and Nusselt number in turbulent thermal convection. We …

Effects of strong fringing magnetic fields on turbulent thermal convection

S Bhattacharya, T Boeck, D Krasnov… - Journal of Fluid …, 2023 - cambridge.org
We study the influence of fringing magnetic fields on turbulent thermal convection in a
horizontally extended rectangular domain. The magnetic field is created in the gap between …

Prandtl number dependence of the small-scale properties in turbulent Rayleigh-Bénard convection

S Bhattacharya, MK Verma, R Samtaney - Physical Review Fluids, 2021 - APS
We analyze the Prandtl number (Pr) dependence of spectra and fluxes of kinetic energy, as
well as the energy injection rates and dissipation rates, of turbulent thermal convection using …

Large-eddy simulation of Rayleigh–Bénard convection at extreme Rayleigh numbers

R Samuel, R Samtaney, MK Verma - Physics of Fluids, 2022 - pubs.aip.org
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 …

Convective heat transport in slender cells is close to that in wider cells at high Rayleigh and Prandtl numbers (a)

A Pandey, KR Sreenivasan - Europhysics Letters, 2021 - iopscience.iop.org
Direct numerical simulations of turbulent convection at high Rayleigh numbers in large
aspect ratio cells are challenging because of the prohibitive computational resources …

Refined mean field model of heat and momentum transfer in magnetoconvection

T Zürner - Physics of Fluids, 2020 - pubs.aip.org
In this article, the theoretical model on heat and momentum transfer for Rayleigh–Bénard
convection in a vertical magnetic field by Zürner et al.[“Heat and momentum transfer for …

Bolgiano-Obukhov scaling in two-dimensional Rayleigh-Bénard convection at extreme Rayleigh numbers

R Samuel, MK Verma - Physical Review Fluids, 2024 - APS
Understanding the behavior of the kinetic energy spectrum and flux in two-dimensional (2D)
turbulent thermal convection remains a challenge. In this paper, using high-resolution direct …

[HTML][HTML] Large-scale structures of turbulent Rayleigh–Bénard convection in a slim-box

WF Zhou, J Chen - Physics of Fluids, 2021 - pubs.aip.org
We report a numerical study of the large-scale structure of turbulent Rayleigh–Bénard
convection (RBC) in a slim-box using direct numerical simulations. The simulations are …

Role of partial stable stratification on fluid flow and heat transfer in rotating thermal convection

T Barman, S Sahoo - Physics of Fluids, 2024 - pubs.aip.org
The liquid iron core of the Earth undergoes vigorous convection driven by thermal and
compositional buoyancy. The dynamics of convective fluid motions and heat transfer in such …