17 citations · 27 across the 9 of their papers we have counts for
9 papers
Lagrangian particles and particle clusters in large-aspect-ratio turbulent Rayleigh-Bénard convection experiment
Prafulla P. Shevkar, Mitanjali, Roshan J. Samuel +2
We perform Lagrangian particle-tracking experiments in turbulent Rayleigh-Bénard convection at aspect ratio Gamma = 10, Rayleigh number Ra = 9.3 x 10^7, and Prandtl number Pr = 4.8…
Circulation Statistics in Rayleigh-Bénard Convection
Giovanni Saisse, Roshan J. Samuel, Luca Moriconi +2
Important statistical properties of velocity circulation in homogeneous isotropic turbulence (HIT) have been unveiled in recent years, raising the question of whether they persist,…
Lagrangian single-particle, multi-particle and topological analyses in turbulent Rayleigh-Bénard convection
Matti Ettel, Roshan J. Samuel, Michael Chertkov +1
We present three-dimensional direct numerical simulations of turbulent Rayleigh-Bénard convection (RBC) in the Lagrangian frame of reference for Rayleigh numbers $10^5 \leq Ra \leq…
Transient almost-invariant sets reveal convective heat transfer patterns in plane-layer Rayleigh-Bénard convection
Aleksandar Badza, Gary Froyland, Roshan J. Samuel +1
Horizontally extended plane-layer convection flows are characterized by characteristic patterns of turbulent heat transfer due to the convective fluid motion consisting of a nearly…
Plane-layer Rayleigh-Bénard convection up to : Near-wall fluctuations and role of initial conditions
Roshan J. Samuel, Jörg Schumacher
We study turbulent Rayleigh-Bénard convection through direct numerical simulations in a three-dimensional plane layer of aspect ratio 4 for Rayleigh numbers $10^5 \leq Ra \leq 10^{…
Three-dimensional velocity gradient statistics in a mesoscale convection laboratory experiment
Prafulla P. Shevkar, Roshan J. Samuel, Christian Cierpka +1
We present three-dimensional velocity gradient statistics from Rayleigh--Bénard convection experiments in a horizontally extended cell of aspect ratio 25, a paradigm for mesoscale…
Deciphering boundary layer dynamics in high-Rayleigh-number convection using 3360 GPUs and a high-scaling in-situ workflow
Mathis Bode, Damian Alvarez, Paul Fischer +10
Turbulent heat and momentum transfer processes due to thermal convection cover many scales and are of great importance for several natural and technical flows. One consequence is t…
Turbulent mesoscale convection in the Boussinesq limit and beyond
Shadab Alam, Dmitry Krasnov, Ambrish Pandey +4
Mesoscale convection covers an intermediate scale range between small-scale turbulence and the global organization of the convection flow. It is often characterized by an order of…
No sustained mean velocity in the boundary region of plane thermal convection
Roshan J. Samuel, Mathis Bode, Janet D. Scheel +2
We study the dynamics of thermal and momentum boundary regions in three-dimensional direct numerical simulations of Rayleigh-Bénard convection for the Rayleigh number range $10^5 \…