Cascades and transitions in turbulent flows
A Alexakis, L Biferale - Physics Reports, 2018 - Elsevier
Turbulent flows are characterized by the non-linear cascades of energy and other inviscid
invariants across a huge range of scales, from where they are injected to where they are …
invariants across a huge range of scales, from where they are injected to where they are …
Helicity distributions and transfer in turbulent channel flows with streamwise rotation
Helicity is a quadratic inviscid conservative quantity in three-dimensional turbulent flows and
is crucial for turbulent system evolution. Helicity effects have mainly been highlighted over …
is crucial for turbulent system evolution. Helicity effects have mainly been highlighted over …
Bolgiano-Obukhov spectrum and mixing efficiency in stably stratified turbulence
In this paper, using a shell model, we simulate highly turbulent stably stratified flow for weak
to moderate stratification at unitary Prandtl number. We investigate the energy spectra and …
to moderate stratification at unitary Prandtl number. We investigate the energy spectra and …
New exact Betchov-like relation for the helicity flux in homogeneous turbulence
In homogeneous and isotropic turbulence, the relative contributions of different physical
mechanisms to the energy cascade can be quantified by an exact decomposition of the …
mechanisms to the energy cascade can be quantified by an exact decomposition of the …
Role of helicity for large-and small-scale turbulent fluctuations
The effects of the helicity on the dynamics of turbulent flows are investigated. The aim is to
disentangle the role of helicity in fixing the direction, the intensity, and the fluctuations of the …
disentangle the role of helicity in fixing the direction, the intensity, and the fluctuations of the …
Helicity and turbulence in the atmospheric boundary layer
Helicity is inherent in many circulating motions and structures in the atmospheric boundary
layer (ABL), where it is continuously reproduced due to the combined action of the Earth's …
layer (ABL), where it is continuously reproduced due to the combined action of the Earth's …
Helicity budget in turbulent channel flows with streamwise rotation
The streamwise rotation effects in turbulent channel flows are reflected not only in the
appearance of the secondary flows but also in the weakened streamwise velocity and …
appearance of the secondary flows but also in the weakened streamwise velocity and …
Effects of helicity on dissipation in homogeneous box turbulence
M Linkmann - Journal of Fluid Mechanics, 2018 - cambridge.org
The dimensionless dissipation coefficient on the helicity of the force is well captured by
upper bound theory. Consequences for the value of the Kolmogorov constant and …
upper bound theory. Consequences for the value of the Kolmogorov constant and …
The spatial segregation of kinetic helicity in geodynamo simulations
A Ranjan, P Davidson - Geophysical Monograph Series, 2024 - Wiley Online Library
Kinetic helicity and its spatial distribution are thought to be important for the maintenance of
a dipolar magnetic field in the geodynamo through the α-effect. Outside the inner core …
a dipolar magnetic field in the geodynamo through the α-effect. Outside the inner core …
On the distribution of helicity in the tropical cyclone boundary layer from dropsonde composites
This study analyzes GPS dropsonde data in multiple tropical cyclones from 1997 to 2017 to
investigate the boundary layer structure with a focus on helicity distribution. A helicity-based …
investigate the boundary layer structure with a focus on helicity distribution. A helicity-based …