Results 111 to 120 of about 31,732 (215)

Magnetically Assisted Vorticity Production in Decaying Acoustic Turbulence

The Astrophysical Journal
We study vorticity production in isothermal, subsonic, acoustic (nonvortical), and decaying turbulence due to the presence of magnetic fields. Using three-dimensional numerical simulations, we find that the resulting kinetic energy cascade follows the ...
Axel Brandenburg, Evan Scannapieco
doaj   +1 more source

Spatial Fluctuations of Optical Turbulence Strength in a Laboratory Turbulence Simulator

Photonics
Controlled turbulence simulators in the laboratory have been extensively employed to investigate turbulence effects on light propagation in the atmosphere, driven by some advanced optical engineering such as remote sensing, energy-delivery systems, and ...
Yanling Li, Haiping Mei, Shuran Ye, Zhiwei Tao, Hanling Deng, Xiaoqing Wu, Ruizhong Rao   +6 more
doaj   +1 more source

Mean- Field Approximation and a Small Parameter in Turbulence Theory

, 2000
Numerical and physical experiments on two-dimensional (2d) turbulence show that the differences of transverse components of velocity field are well described by a gaussian statistics and Kolmogorov scaling exponents.
A. M. Polyakov, A. M. Polyakov, A. S. Monin, B. I. Shraiman, G. Boffetta, K. Gawedzki, L. D. Landau, L. Smith, L. Smith, M. Cherkov, P. Tabeling, R. H. Kraichnan, U. Frisch, U. Frisch, V. Yakhot, V. Yakhot, V. Yakhot, V. Yakhot, Victor Yakhot, Ya. G. Sinai, Yakhot Orszag   +20 more
core   +1 more source

Unraveling the propagation dynamics of radially polarized anomalous vortex beams in turbulent maritime atmospheres

Results in Physics
Based on the unified theory of coherence-polarization, we utilize the extended Huygens-Fresnel principle to derive analytical expressions for the average intensity distribution of a radially polarized anomalous vortex beam (RPAVB) propagating through non-
Hassan Al-Ahsab, Mingjian Cheng, Yuancong Cao, ShuaiLing Wang, Xiang Yi, Lixin Guo   +5 more
doaj   +1 more source

Study of Reducing Atmospheric Turbulence-Induced Beam Wander of a Twisted Electromagnetic Elliptical Vortex Beam

Photonics
We derive the analytical expressions for root-mean-square (rms) beam wander (BW) and relative BW of a twisted electromagnetic elliptical vortex (TEEV) beam propagating through non-Kolmogorov atmospheric turbulence with the help of the extended Huygens ...
Kai Huang, Yonggen Xu, Yuqiang Li, Jin Cao   +3 more
doaj   +1 more source

A study of magnetic fluctuations and their anomalous scaling in the solar wind: the Ulysses fast-latitude scan [PDF]

Nonlinear Processes in Geophysics, 2001
The solar wind is a highly turbulent and intermittent medium at frequencies between 10-4 and 10-1 Hz. Power spectra are used to look at fluctuations in the components of the magnetic field at high frequencies over a wide range of latitudes.
c. Pagel, A. Balogh
doaj  

Qualitative meta-synthesis comparing non-Newtonian, non-Kolmogorov, and modified Krieger computational fluid dynamics models exploring the intracranial aneurysm dynamics: state of the art

Interdisciplinary Neurosurgery
Background: Computational fluid dynamics (CFD) models are crucial for examining blood flow and the morphology of brain aneurysms. These models are used to enhance the understanding of the formation, rupture, and post-treatment behavior of aneurysms.
Yao Christian Hugues Dokponou, Abdessamad El Ouahabi, Mahjouba Boutarbouch   +2 more
doaj   +1 more source

Quadratic Vortex Optical Pin Beam With OAM Mode Anti-Degradation Characteristic

IEEE Photonics Journal
Orbital angular momentum (OAM) signal mode crosstalk and energy loss induced by atmospheric turbulence are challenging phenomena commonly occurring in high-capacity and high-speed OAM-based free-space optical communications. In this paper, we combine the
Huahua Wang, Meiling Guan, Hongyue Xiao, Hongwei Jiang, Changqi Zhang, Yang Liu, Fei Chen, Lu Gao, Ze Zhang   +8 more
doaj   +1 more source

THE MODELING OF UNSTEADY TURBULENT FLOWS IN TURBOMACHINES

TASK Quarterly, 2001
The suitability of existing models for the simulation of flow through turbomachines is investigated and compared with a recently proposed adaptive turbulence model.
FRANCO MAGAGNATO
doaj  

Non Kolmogorov-like Turbulence in the Local Interstellar Medium

, 2008
Paper is accepted for publication in ASP Conference ...
openaire   +2 more sources