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Multiscale velocity gradients in turbulence
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 …
Energy transfer from large to small scales in turbulence by multiscale nonlinear strain and vorticity interactions
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 …
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 …
On the role of vorticity stretching and strain self-amplification in the turbulence energy cascade
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 …
Direct numerical simulation of particle-laden flow in an open channel at
We perform two-way coupled direct numerical simulation of particle-laden flow in an open
channel at a friction Reynolds number (). The spatial structures are investigated with …
channel at a friction Reynolds number (). The spatial structures are investigated with …
Generation mechanism of a hierarchy of vortices in a turbulent boundary layer
To understand the generation mechanism of a hierarchy of multiscale vortices in a high-
Reynolds-number turbulent boundary layer, we conduct direct numerical simulations and …
Reynolds-number turbulent boundary layer, we conduct direct numerical simulations and …
Alignment of inertialess spheroidal particles in flow-structure-dominated regions of turbulent channel flow: shape effect
The alignment of elongated fibers and thin disks is known to be significantly influenced by
the presence of fluid coherent structures in near-wall turbulence (Cui et al. 2021). However …
the presence of fluid coherent structures in near-wall turbulence (Cui et al. 2021). However …
On the role of turbulent large-scale streaks in generating sediment ridges
The role of turbulent large-scale streaks or large-scale motions in forming subaqueous
sediment ridges on an initially flat sediment bed is investigated with the aid of particle …
sediment ridges on an initially flat sediment bed is investigated with the aid of particle …
Role of the hierarchy of coherent structures in the transport of heavy small particles in turbulent channel flow
To investigate the transport of heavy small particles (inertial particles) in high-Reynolds-
number wall turbulence, we conduct direct numerical simulations of inertial particles in …
number wall turbulence, we conduct direct numerical simulations of inertial particles in …
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 …