Extended Self-Similarity in Edge Plasma Turbulence of Fusion Devices

2008 ◽  
Vol 48 (1-3) ◽  
pp. 42-47 ◽  
Author(s):  
V. P. Budaev ◽  
N. Ohno ◽  
S. Takamura ◽  
S. Masuzaki ◽  
A. Komori ◽  
...  
Keyword(s):  
Plasma Turbulence ◽  
Edge Plasma ◽  
Self Similarity ◽  
Extended Self

Reduction of edge plasma turbulence via cross-phase decrease by zonal fields

2019 ◽  
Vol 61 (8) ◽  
pp. 085024 ◽  
Author(s):  
Chang-Bae Kim ◽  
Chan-Yong An ◽  
Byunghoon Min
Keyword(s):  
Plasma Turbulence ◽  
Edge Plasma

Scaling of edge-plasma turbulence in the Caltech tokamak

1983 ◽  
Vol 23 (12) ◽  
pp. 1625-1641 ◽  
Author(s):  
S.J. Zweben ◽  
R.W. Gould
Keyword(s):  
Plasma Turbulence ◽  
Edge Plasma

scholarly journals NEI Modelling of the ISM - Turbulent Dissipation and Hausdorff Dimension

2009 ◽  
Vol 5 (H15) ◽  
pp. 468-469 ◽  
Author(s):  
Miguel A. de Avillez ◽  
Dieter Breitschwerdt
Keyword(s):  
High Resolution ◽  
Hausdorff Dimension ◽  
Dissipative Structures ◽  
Self Similarity ◽  
Extended Self ◽  
Turbulent Dissipation ◽  
Independent Information ◽  
Ionization Structure ◽  
Wide Range ◽  
Self Gravity

AbstractHigh-resolution non-ideal magnetohydrodynamical simulations of the turbulent magnetized ISM, powered by supernovae types Ia and II at Galactic rate, including self-gravity and non-equilibriuim ionization (NEI), taking into account the time evolution of the ionization structure of H, He, C, N, O, Ne, Mg, Si, S and Fe, were carried out. These runs cover a wide range (from kpc to sub-parsec) of scales, providing resolution independent information on the injection scale, extended self-similarity and the fractal dmension of the most dissipative structures.

Anomalous diffusion and radial electric field generation due to edge plasma turbulence

2004 ◽  
Vol 44 (13) ◽  
pp. 203-204 ◽  
Author(s):  
R. Pánek ◽  
L. Krlín ◽  
D. Tskhakaya ◽  
S. Kuhn ◽  
J. Stöckel ◽  
...  
Keyword(s):  
Electric Field ◽  
Anomalous Diffusion ◽  
Radial Electric Field ◽  
Plasma Turbulence ◽  
Edge Plasma ◽  
Field Generation ◽  
Electric Field Generation

scholarly journals Solar wind low-frequency magnetohydrodynamic turbulence: extended self-similarity and scaling laws

1996 ◽  
Vol 3 (4) ◽  
pp. 247-261 ◽  
Author(s):  
V. Carbone ◽  
P. Veltri ◽  
R. Bruno
Keyword(s):  
Solar Wind ◽  
Scaling Laws ◽  
Velocity Structure ◽  
Fluid Flows ◽  
Structure Functions ◽  
Point Of View ◽  
Self Similarity ◽  
Extended Self ◽  
Scaling Exponents ◽  
Magnetohydrodynamic Turbulence

Abstract. In this paper we review some of the work done in investigating the scaling properties of Magnetohydrodynamic turbulence, by using velocity fluctuations measurements performed in the interplanetary space plasma by the Helios spacecraft. The set of scaling exponents ξq for the q-th order velocity structure functions, have been determined by using the Extended Self-Similarity hypothesis. We have found that the q-th order velocity structure function, when plotted vs. the 4-th order structure function, displays a range of self-similarity which extends over all the lengths covered by measurements, thus allowing for a very good determination of ξq. Moreover the results seem to show that the scaling exponents are the same regardless the various observation periods considered. The obtained scaling exponents have been compared with the results of some intermittency models for Kraichnan's turbulence, derived in the framework of infinitely divisible fragmentation processes, showing the good agreement between these models and our observations. Finally, on the basis of the actually available data sets, we show that scaling laws in Solar Wind turbulence seem to be different from turbulent scaling laws in the ordinary fluid flows. This is true for high-order velocity structure functions, while low-order velocity structure functions show the same scaling laws. Since our measurements involve length scales which extend over many order of magnitude where dissipation is practically absent, our results show that Solar Wind turbulence can be regarded as a testing bench for the investigation of general scaling behaviour in turbulent flows. In particular our results strongly support the point of view which attributes a key role to the inertial range dynamics in determining the intermittency characteristics in fluid flows, in contrast with the point of view which attributes intermittency to a finite Reynolds number effect.

scholarly journals Particle Dynamics in the RMP Ergodic Layer under the Influence of Edge Plasma Turbulence

10.14311/1831 ◽  
2013 ◽  
Vol 53 (4) ◽  
Author(s):  
Matúš Kurian ◽  
Ladislav Krlín ◽  
Pavel Cahyna ◽  
Radomír Pánek
Keyword(s):  
Plasma Turbulence ◽  
Edge Plasma ◽  
Tokamak Plasma ◽  
Edge Region ◽  
Ion Dynamics ◽  
Plasma Dynamics ◽  
Complex Processes ◽  
Edge Localized Modes ◽  
Particle Simulations ◽  
Practical Implications

The complex processes in edge tokamak plasma are affected (among others) both by resonant magnetic perturbation (RMP) and by plasma turbulence. RMP is nowadays considered to be a candidate for the mitigation of the edge-localized modes (ELMs). The effect of plasma turbulence inthe edge region has not been studied yet. Since both RMP and plasma turbulence should influence plasma dynamics, studies of their simultaneous effect have potential practical implications. Using a simplified model of the turbulence and single-particle simulations, we discovered that its effect at realistic amplitudes changes the ion dynamics significantly. We expect that the turbulence has a similar effect on electrons, thus potentially influencing the ELM mitigation mechanism.

scholarly journals Eulerian and Lagrangian Structure Function’s Scaling Exponents in Turbulent Channel Flow

2006 ◽  
Vol 61 (12) ◽  
pp. 624-628
Author(s):  
Jian-Ping Luo ◽  
Tatsuo Ushijima ◽  
Osami Kitoh ◽  
Zhi-Ming Lu ◽  
Yu-Lu Liu ◽  
...  
Keyword(s):  
Channel Flow ◽  
Scaling Laws ◽  
Turbulent Channel Flow ◽  
Self Similarity ◽  
Extended Self ◽  
Scaling Exponents ◽  
Turbulent Channel Flows ◽  
Frame Work ◽  
Simulation Results ◽  
Similarity Method

The relation between Eulerian structure function’s scaling exponents and Lagrangian ones in turbulent channel flows is explored both theoretically and numerically. A nonlinear parametric transformation between Eulerian structure function’s scaling exponents and Lagrangian ones is derived, following Landau and Novikov’s frame work. This relation is then compared to some known experimental and numerical results, but mainly to our DNS (direct numerical simulation) results of a fully developed channel flow with Reτ = 100. The scaling exponents are evaluated in terms of the ESS (extended self-similarity) method, since the Reynolds number is too low to make the standard scaling laws applicable. The agreement between theory and simulation is satisfactory

Sign in / Sign up

Export Citation Format

Share Document