Particles and fields in fluid turbulence

G Falkovich, K Gawȩdzki, M Vergassola - Reviews of modern Physics, 2001 - APS
The understanding of fluid turbulence has considerably progressed in recent years. The
application of the methods of statistical mechanics to the description of the motion of fluid …

Statistics of kinetic and thermal energy dissipation rates in two-dimensional turbulent Rayleigh–Bénard convection

Y Zhang, Q Zhou, C Sun - Journal of Fluid Mechanics, 2017 - cambridge.org
We investigate the statistical properties of the kinetic is found to be plume dominated.
Moreover, the boundary-layer/plume contributions scale as those predicted by the GL …

Lagrangian views on turbulent mixing of passive scalars

KR Sreenivasan, J Schumacher - … Transactions of the …, 2010 - royalsocietypublishing.org
The Lagrangian view of passive scalar turbulence has recently produced interesting results
and interpretations. Innovations in theory, experiments, simulations and data analysis of …

Very fine structures in scalar mixing

J Schumacher, KR Sreenivasan… - Journal of Fluid …, 2005 - cambridge.org
We explore very fine scales of scalar dissipation in turbulent mixing, below Kolmogorov and
around Batchelor scales, by performing direct numerical simulations at much finer grid …

Fine-scale statistics of temperature and its derivatives in convective turbulence

MS Emran, J Schumacher - Journal of Fluid Mechanics, 2008 - cambridge.org
We study the fine-scale statistics of temperature and its derivatives in turbulent Rayleigh–
Bénard convection. Direct numerical simulations are carried out in a cylindrical cell with unit …

Statistics of velocity and temperature fluctuations in two-dimensional Rayleigh-Bénard convection

Y Zhang, YX Huang, N Jiang, YL Liu, ZM Lu, X Qiu… - Physical Review E, 2017 - APS
We investigate fluctuations of the velocity and temperature fields in two-dimensional (2D)
Rayleigh-Bénard (RB) convection by means of direct numerical simulations (DNS) over the …

Analysis of the thermal plumes in turbulent Rayleigh–Bénard convection based on well-resolved numerical simulations

M Kaczorowski, C Wagner - Journal of Fluid Mechanics, 2009 - cambridge.org
In this study, direct numerical simulations and high-resolved large eddy simulations of
turbulent Rayleigh–Bénard convection were conducted with a fluid of Prandtl number Pr …

Transition of fluctuations from Gaussian state to turbulent state

T Gotoh, J Yang - … Transactions of the Royal Society A, 2022 - royalsocietypublishing.org
Variation of the statistical properties of an incompressible velocity, passive vector and
passive scalar in isotropic turbulence was studied using direct numerical simulation. The …

Statistics and geometry of passive scalars in turbulence

J Schumacher, KR Sreenivasan - Physics of Fluids, 2005 - pubs.aip.org
We present direct numerical simulations of the mixing of the passive scalar at modest Taylor
microscale (10⩽ R λ⩽ 42) and Schmidt numbers larger than unity (2⩽ Sc⩽ 32)⁠. The …

Spatial dependence of correlation functions in the decay problem for a passive scalar in a large-scale velocity field

SS Vergeles - Journal of Experimental and Theoretical Physics, 2006 - Springer
Statistical characteristics of a passive scalar advected by a turbulent velocity field are
considered in the decay problem with a low scalar diffusivity κ (large Prandtl number v/κ …