10 papers
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…
Extending the Duchon-Robert framework for anomalous dissipation to compressible fluid flows
Georgy Zinchenko, Jörg Schumacher
Anomalous dissipation, the persistence of a finite mean kinetic energy dissipation as the Reynolds number tends to infinity, occurs in flows with sufficiently spatially rough veloc…
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^{…
Scale-resolved turbulent Prandtl number for Rayleigh-Bénard convection at
Shashwat Bhattacharya, Dmitry Krasnov, Ambrish Pandey +2
We present a framework to calculate the scale-resolved turbulent Prandtl number for the well-mixed and highly inertial bulk of a turbulent Rayleigh-Bénard mesoscale convecti…
Quantum-assisted tracer dispersion in turbulent shear flow
Julia Ingelmann, Fabian Schindler, Jörg Schumacher
We present a quantum-assisted generative algorithm for synthetic tracks of Lagrangian tracer particles in a turbulent shear flow. The parallelism and sampling properties of quantum…
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…