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 …

Similarities between characteristics of convective turbulence in confined and extended domains

A Pandey, D Krasnov, J Schumacher… - Physica D: Nonlinear …, 2022 - Elsevier
To understand turbulent convection at very high Rayleigh numbers typical of natural
phenomena, computational studies in slender cells are an option if the needed resources …

Spectra and structure functions of the temperature and velocity fields in supergravitational thermal turbulence

D Wang, S Liu, Q Zhou, C Sun - Physics of Fluids, 2022 - pubs.aip.org
We analyze the power spectra and structure functions (SFs) of the temperature and radial
velocity fields, calculated in the radial and azimuthal directions, in annular centrifugal …

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 …

Convective mesoscale turbulence at very low Prandtl numbers

A Pandey, D Krasnov, KR Sreenivasan… - Journal of Fluid …, 2022 - cambridge.org
Horizontally extended turbulent convection, termed mesoscale convection in natural
systems, remains a challenge to investigate in both experiments and simulations. This is …

Spatial Fluctuations of Optical Turbulence Strength in a Laboratory Turbulence Simulator

Y Li, H Mei, S Ye, Z Tao, H Deng, X Wu, R Rao - Photonics, 2024 - mdpi.com
Controlled turbulence simulators in the laboratory have been extensively employed to
investigate turbulence effects on light propagation in the atmosphere, driven by some …

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 …

The emergence and identification of large-scale coherent structures in free convective flows of the Rayleigh-Bénard Type

S Smirnov, A Smirnovsky, S Bogdanov - Fluids, 2021 - mdpi.com
The revealing of the turbulence archetypes is one of the fundamental problems in the study
of turbulence, which is important not only from the fundamental point of view but also 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 …

Dominant heat transfer mechanism with conical roughness in a cubical box in turbulent Rayleigh–Bénard convection

M Sharma, K Chand, AK De - Physics of Fluids, 2024 - pubs.aip.org
In the present study, we numerically investigate the effect of Prandtl number on the heat
transfer mechanism in turbulent Rayleigh–Bénard convection inside a cubical box endowed …