Results 91 to 100 of about 2,592 (223)
Multiscale turbulence in stellarators
Nuclear FusionWe present the first gyrokinetic simulations of multiscale turbulence in a stellarator, using the magnetic geometry of Wendelstein 7-X (W7-X) and experimentally relevant parameters. A broad range of scenarios is explored, including regimes where electron-
G. Merlo +4 more
doaj +1 more source
Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.Abstract We report a rare quiet‐time observation by NOAA‐18 spacecraft flying nearly along the electron isotropy boundary (IBe). Complemented by data from four nearby meridional IBe crossings of other POES spacecraft, this case study provides a novel quantitative information concerning the regular energy dependence of the loss‐cone filling ratio (Jprec/
V. A. Sergeev +5 more
wiley +1 more source
Turbulence Mode Decomposition and Anisotropy in Magnetically Dominated Collisionless Plasmas
The Astrophysical JournalWe use 3D fully kinetic simulations to study different turbulence modes and turbulence anisotropy of relativistic turbulence in magnetically dominated collisionless plasmas. We extend the method developed by J. Cho & A.
Samuel T. Sebastian +5 more
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Unstable periodic motion in turbulent flows [PDF]
Nonlinear Processes in Geophysics, 2006 Recently found unstable time-periodic solutions to the incompressible Navier-Stokes equation are reviewed to discuss their relevance to plane Couette turbulence and isotropic turbulence.
G. Kawahara, S. Kida, L. van Veen
doaj
New Journal of Physics, 2014 Part I of this two-part series compared two theories for the radial distribution function (RDF), a statistical measure of the clustering of inertial particles in isotropic turbulence. In Part II, we will contrast three theoretical models for the relative
Andrew D Bragg, Lance R Collins
doaj +1 more source
Fluctuation-induced force in homogeneous isotropic turbulence. [PDF]
Sci Adv, 2020 Spandan V +3 more
europepmc +1 more source
Large Eddy Simulations of the Atmospheric Boundary Layer Over Satellite‐Sensed Sea Ice Maps
Journal of Geophysical Research: Atmospheres, Volume 131, Issue 11, 16 June 2026.Abstract Surface heterogeneity in the marginal ice zone (MIZ) causes multiscale secondary atmospheric circulations that are challenging to model or observe. The absence or inadequate representation of these circulations in ocean‐atmosphere exchange schemes in climate models is partially responsible for the underestimation of Arctic sea ice loss ...
Joseph Fogarty +5 more
wiley +1 more source
The Lifecycle of Tracer Variance in the North Atlantic
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract Oceanic tracer distributions are shaped by turbulent mixing, which may be understood via a tracer variance budget. There is a tracer variance lifecycle: variance production by turbulent flows stirring large‐scale gradients, redistribution by currents, and variance dissipation by molecular diffusion.
Espe Broullón +4 more
wiley +1 more source
Geophysical Research Letters, Volume 53, Issue 11, 16 June 2026.Abstract We present the first in situ observations of the full turbulence tensor of free convection under lake ice, obtained using an original method based on a set of two synchronized acoustic Doppler profilers to measure all six turbulent stress components.
G. B. Kirillin +2 more
wiley +1 more source
A Non‐Reciprocal Architected Porous Medium
Advanced Functional Materials, Volume 36, Issue 47, 11 June 2026.ABSTRACT In several fluid flow, energy‐dumping, and energy‐harvesting applications, a dominant flow direction or dominant resistance direction is desirable. In this study, we propose a simple modular geometry that doubles flow resistance in one direction relative to the opposite direction, while maintaining laminar viscous flow.
Clément Vezies +2 more
wiley +1 more source