Multiscale velocity gradients in turbulence
PL Johnson, M Wilczek - Annual Review of Fluid Mechanics, 2024 - annualreviews.org
Understanding and predicting turbulent flow phenomena remain a challenge for both theory
and applications. The nonlinear and nonlocal character of small-scale turbulence can be …
and applications. The nonlinear and nonlocal character of small-scale turbulence can be …
Turbulence theories and statistical closure approaches
Y Zhou - Physics Reports, 2021 - Elsevier
When discussing research in physics and in science more generally, it is common to ascribe
equal importance to the three components of the scientific trinity: theoretical, experimental …
equal importance to the three components of the scientific trinity: theoretical, experimental …
Is vortex stretching the main cause of the turbulent energy cascade?
In three-dimensional turbulence there is on average a cascade of kinetic energy from the
largest to the smallest scales of the flow. While the dominant idea is that the cascade occurs …
largest to the smallest scales of the flow. While the dominant idea is that the cascade occurs …
Energy transfer from large to small scales in turbulence by multiscale nonlinear strain and vorticity interactions
PL Johnson - Physical review letters, 2020 - APS
An intrinsic feature of turbulent flows is an enhanced rate of mixing and kinetic energy
dissipation due to the rapid generation of small-scale motions from large-scale excitation …
dissipation due to the rapid generation of small-scale motions from large-scale excitation …
On the role of vorticity stretching and strain self-amplification in the turbulence energy cascade
PL Johnson - Journal of Fluid Mechanics, 2021 - cambridge.org
The tendency of turbulent flows to produce fine-scale motions from large-scale energy
injection is often viewed as a scale-wise cascade of kinetic energy driven by vorticity …
injection is often viewed as a scale-wise cascade of kinetic energy driven by vorticity …
Hierarchy of coherent vortices in turbulence behind a cylinder
To draw concrete pictures of the hierarchy of multiscale coherent vortices in turbulence
behind a cylinder and to reveal their sustaining mechanism, we conduct direct numerical …
behind a cylinder and to reveal their sustaining mechanism, we conduct direct numerical …
A physical model of turbulence cascade via vortex reconnection sequence and avalanche
Viscous anti-parallel vortex reconnection is studied by means of direct numerical simulation
for vortex Reynolds numbers reconnection, but also shed light on the physics of turbulence …
for vortex Reynolds numbers reconnection, but also shed light on the physics of turbulence …
Hierarchy of coherent structures and real-space energy transfer in turbulent channel flow
By analysing a database (Lozano-Durán & Jiménez, Phys. Fluids, vol. 26, 2014, 011702) of
fully developed turbulent channel flow at the friction Reynolds number, we investigate the …
fully developed turbulent channel flow at the friction Reynolds number, we investigate the …
Interactions between flame topology and turbulent transport in high-pressure premixed combustion
D Martínez-Sanchis, A Sternin, K Tagscherer… - Flow, Turbulence and …, 2022 - Springer
Direct numerical simulations of a turbulent premixed stoichiometric methane-oxygen flame
were conducted. The chosen combustion pressure was 20 bar, to resemble conditions …
were conducted. The chosen combustion pressure was 20 bar, to resemble conditions …
Physics-informed machine learning of the Lagrangian dynamics of velocity gradient tensor
Reduced models describing the Lagrangian dynamics of the velocity gradient tensor (VGT)
in homogeneous isotropic turbulence (HIT) are developed under the physics-informed …
in homogeneous isotropic turbulence (HIT) are developed under the physics-informed …