Results 71 to 80 of about 7,781 (181)

Cascades and transitions in turbulent flows

, 2018
Turbulence is 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 dissipated.
Alexakis, A., Biferale, L.
core   +1 more source

Solar cycle dependence of scaling in solar wind fluctuations [PDF]

, 2008
In this review we collate recent results for the statistical scaling properties of fluctuations in the solar wind with a view to synthesizing two descriptions: that of evolving MHD turbulence and that of a scaling signature of coronal origin that ...
Chapman, Sandra C., Hnat, B., Kiyani, K.
core   +4 more sources

Energy spectrum of turbulent fluctuations in boundary driven reduced magnetohydrodynamics

, 2003
The nonlinear dynamics of a bundle of magnetic flux ropes driven by stationary fluid motions at their endpoints is studied, by performing numerical simulations of the magnetohydrodynamic (MHD) equations.
Daniel O. Gómez, Dmitruk P., Galsgaard K., Grappin R., Gómez D. O., Hendrix D. L., Hendrix D. L., Iroshnikov P. S., Kolmogorov A. N., Mandrini C. H., Matthaeus W. H., Milano L., Pablo Dmitruk, William H. Matthaeus   +13 more
core   +1 more source

The analysis of anisotropic the non-Kolmogorov turbulence effect on asymmetrical Gaussian beam propagation in a marine atmosphere

Laser Physics, 2019
The variations of the scintillation index of an asymmetrical Gaussian beam are investigated when the beam propagates in anisotropic non-Kolmogorov marine atmospheric turbulence. The results indicate that the scintillation decreases when the anisotropy factors in both x and y directions increase. Increases in the beam asymmetry ratio and the inner scale
Yalçın Ata, Yahya Baykal
openaire   +2 more sources

Universal properties of three-dimensional magnetohydrodynamic turbulence: Do Alfv\'en waves matter?

, 2005
We analyse the effects of the propagating Alfv\'en waves, arising due to non-zero mean magnetic fields, on the nonequilibrium steady states of three-dimensional (3d) homogeneous Magnetohydrodynamic (MHD) turbulence. In particular, the effects of Alfv\'en
Basu, Abhik, Bhattacharjee, Jayanta K
core   +1 more source

On the energy spectrum of strong magnetohydrodynamic turbulence

, 2012
The energy spectrum of magnetohydrodynamic turbulence attracts interest due to its fundamental importance and its relevance for interpreting astrophysical data.
Boldyrev, Stanislav, Cattaneo, Fausto, Mason, Joanne, Perez, Jean Carlos   +3 more
core   +2 more sources

Analysis of angle of arrival fluctuations for optical waves’ propagation through weak anisotropic non-Kolmogorov turbulence

Optics Express, 2015
Analytical expressions for the variance of angle of arrival (AOA) fluctuations based on the Rytov approximation theory are derived for plane and spherical waves' propagation through weak anisotropic non-Kolmogorov turbulence atmosphere. The anisotropic spectrum model based on the assumption of circular symmetry in the orthogonal plane throughout the ...
openaire   +2 more sources

Strong Imbalanced Turbulence

, 2008
We consider stationary, forced, imbalanced, or cross-helical MHD Alfvenic turbulence where the waves traveling in one direction have higher amplitudes than the opposite waves.
A. Beresnyak, A. Lazarian, Grappin R., Iroshnikov P. S., Kolmogorov A., Shebalin J. V.   +5 more
core   +1 more source

Self-sustained oscillations in homogeneous shear flow

, 2002
Generation of the large-scale coherent vortical structurs in homogeneous shear flow couples dynamical processes of energy and enstrophy production. In the large rate of strain limit, the simple estimates of the contributions to the energy and enstrophy ...
Borue V., Garg S., Kida S., Pumir A., Rogers W., Rose W. G., Schumacher J., Shen X., Tavoularis S., Tavoularis S., Victor Yakhot, Yakhot V., Yakhot V.   +12 more
core   +1 more source

Calculating structure function constant from measured C_n ² in non-Kolmogorov and anisotropic turbulence including inner scale effects

Applied Optics, 2019
Optical scintillometers used to characterize turbulence are based on assumptions of isotropic, Kolmogorov turbulence following a κ-11/3 spectral power law. However, experimental data suggest that the turbulence may at times be anisotropic and non-Kolmogorov.
Melissa Beason, Larry Andrews, Italo Toselli   +2 more
openaire   +2 more sources