Correlation of internal flow structure with heat transfer efficiency in turbulent Rayleigh–Bénard convection

A Xu, X Chen, F Wang, HD Xi - Physics of Fluids, 2020 - pubs.aip.org
To understand how internal flow structures manifest themselves in the global heat transfer,
we study the correlation between different flow modes and the instantaneous Nusselt …

Tristable flow states and reversal of the large-scale circulation in two-dimensional circular convection cells

A Xu, X Chen, HD Xi - Journal of Fluid Mechanics, 2021 - cambridge.org
We present a numerical study of the flow states and reversals of the large-scale circulation
(LSC) in a two-dimensional circular Rayleigh–Bénard cell. Long-time direct numerical …

Proper orthogonal decomposition analysis and modelling of the wake deviation behind a squareback Ahmed body

B Podvin, S Pellerin, Y Fraigneau, A Evrard, O Cadot - Physical Review Fluids, 2020 - APS
We investigate numerically the three-dimensional (3D) flow around a squareback Ahmed
body at Reynolds number Re= 10 4. Proper orthogonal decomposition (POD) is applied to a …

[HTML][HTML] proPTV: A probability-based particle tracking velocimetry framework

R Barta, C Bauer, S Herzog, D Schiepel… - Journal of computational …, 2024 - Elsevier
We present proPTV, a comprehensive framework for particle tracking velocimetry. The
framework is an open-source software project and written in Python. It provides the user with …

Numerical study of the coherent structures in a transitional vertical channel natural convection flow

M Thebault, S Giroux-Julien, V Timchenko, J Reizes… - Physics of …, 2021 - pubs.aip.org
Numerical simulations of a spatially developing transitional flow in a vertical channel with
one side uniformly heated and subjected to random velocity fluctuations at the inlet have …

Experimental determination of the 3-D characteristic modes of turbulent Rayleigh–Bénard convection in a cylinder

G Paolillo, CS Greco, T Astarita… - Journal of Fluid …, 2021 - cambridge.org
The present paper reports on a time-resolved three-dimensional experimental study of
turbulent Rayleigh–Bénard convection inside a cylinder with one-half aspect ratio. The …

Turbulent convection in a cube with mixed thermal boundary conditions: low Rayleigh number regime

A Vasiliev, A Sukhanovskii - International Journal of Heat and Mass …, 2021 - Elsevier
Turbulent thermal convection was numerically investigated in a cubic cavity under
homogeneous and inhomogeneous heating for Rayleigh number Ra= 10 7 and Prandtl …

Investigation of flow dynamics and heat transfer mechanism in turbulent Rayleigh–Bénard convection over multi-scale rough surfaces

M Sharma, K Chand, AK De - Journal of Fluid Mechanics, 2022 - cambridge.org
We present a two-dimensional numerical study of turbulent Rayleigh–Bénard convection
with air as the working fluid over a multi-scale randomly roughened surface in a rectangular …

Rayleigh–Bénard convection in a cubic cell under the effects of gas radiation up to Ra= 109

M Delort-Laval, L Soucasse, P Rivière… - International Journal of …, 2022 - Elsevier
This paper investigates radiative transfer effects on Rayleigh–Bénard convection in a cubic
cell over a large range of Rayleigh numbers, from Ra= 10 3 (below the onset of convection) …

Dissipation-based proper orthogonal decomposition of turbulent Rayleigh–Bénard convection flow

PJ Olesen, L Soucasse, B Podvin, CM Velte - Physics of Fluids, 2024 - pubs.aip.org
We present a formulation of proper orthogonal decomposition (POD) producing a velocity–
temperature basis optimized with respect to an H 1 dissipation norm. This decomposition is …