Results 71 to 80 of about 954,404 (186)
Effect of large-scale coherent structures on turbulent convection [PDF]
Physical Review E, 79, 066302 (2009), 2009 We study an effect of large-scale coherent structures on global properties of turbulent convection in laboratory experiments in air flow in a rectangular chamber with aspect ratios $A \approx 2$ and $A\approx 4$ (with the Rayleigh numbers varying in the range from $5 \times 10^6$ to $10^8$). The large-scale coherent structures comprise the one-cell and
arxiv +1 more source
Dependence of Kinetic Plasma Turbulence on Plasma beta [PDF]
The Astrophysical Journal Letters, 864:L21 (2018), 2018 We study the effects of plasma \b{eta} (ratio of plasma pressure to magnetic pressure) on the evolution of kinetic plasma turbulence using fully kinetic particle-in-cell simulations of decaying turbulence. We find that the plasma \b{eta} systematically affects spectra, measures of intermittency, decay rates of turbulence fluctuations, and partitioning ...
arxiv +1 more source
Proceedings of the Royal Society B: Biological Sciences, 2011 Aerial migrants commonly face atmospheric dynamics that may affect their movement and behaviour. Specifically, bird flight mode has been suggested to depend on convective updraught availability and tailwind assistance.
Nir Sapir +5 more
semanticscholar +1 more source
Mesoscale equipartition of kinetic energy in quantum turbulence [PDF]
, 2011 The turbulence of superfluid helium is investigated numerically at finite temperature. Direct numerical simulations are performed with a “truncated HVBK” model, which combines the continuous description of the Hall-Vinen-Bekeravich-Khalatnikov equations ...
J. Salort, P. Roche, Emmanuel L'eveque
semanticscholar +1 more source
CONSERVATIVE CASCADE OF KINETIC ENERGY IN COMPRESSIBLE TURBULENCE [PDF]
, 2011 The physical nature of compressible turbulence is of fundamental importance in a variety of astrophysical settings. We investigate the question: “At what scales does the mechanism of pressure-dilatation operate?” and present the first direct evidence ...
H. Aluie, Shengtai Li, Hui Li
semanticscholar +1 more source
Hybrid-kinetic Simulations of Ion Heating in Alfvénic Turbulence [PDF]
Astrophysical Journal, 2019 We present three-dimensional, hybrid-kinetic numerical simulations of driven Alfvén-wave turbulence of relevance to the collisionless near-Earth solar wind. Special attention is paid to the spectral transition that occurs near the ion-Larmor scale and to
L. Arzamasskiy +3 more
semanticscholar +1 more source
A Weakened Cascade Model for Turbulence in Astrophysical Plasmas [PDF]
, 2011 A refined cascade model for kinetic turbulence in weakly collisional astrophysical plasmas is presented that includes both the transition between weak and strong turbulence and the effect of nonlocal interactions on the nonlinear transfer of energy.
arxiv +1 more source
Dissipation Scaling with a Variable Cϵ Coefficient in the Stable Atmospheric Boundary Layer
AtmosphereThis work concerns the Taylor formula for the turbulence kinetic energy dissipation rate in the stable atmospheric boundary layer. The formula relates the turbulence kinetic energy dissipation rate to statistics at large scales, namely, the turbulence ...
Marta Wacławczyk +4 more
doaj +1 more source
Journal of Limnology, 2016 The vertical migration and accumulation of Microcystis is an important process in water blooms, and colony migration is influenced by colony size and wind-wave disturbance.
Hongru Zhao +5 more
doaj +1 more source
On the role of ion-scale whistler waves in space and astrophysical plasma turbulence [PDF]
Annales Geophysicae, 2016 Competition of linear mode waves is studied numerically to understand the energy cascade mechanism in plasma turbulence on ion-kinetic scales. Hybrid plasma simulations are performed in a 3-D simulation box by pumping large-scale Alfvén waves on the ...
H. Comişel +6 more
doaj +1 more source