Anomalous Heat Transport and Vortex Formation Due to Electron–Temperature–Gradient Driven Drift Waves In a Sheared Flow Plasma

1999 ◽  
Vol 60 (3) ◽  
pp. 261-264 ◽  
Author(s):  
A M Mirza ◽  
T Rafiq ◽  
A Qamar ◽  
G Murtaza ◽  
R T Faria ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Heat Transport ◽  
Vortex Formation ◽  
Drift Waves ◽  
Electron Temperature Gradient ◽  
Sheared Flow ◽  
Anomalous Heat

scholarly journals Excitation of zonal flow by the modulational instability in electron temperature gradient driven turbulence

2008 ◽  
Vol 74 (3) ◽  
pp. 381-389 ◽  
Author(s):  
Yu. A. ZALIZNYAK ◽  
A. I. YAKIMENKO ◽  
V. M. LASHKIN
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Large Scale ◽  
Modulational Instability ◽  
Zonal Flow ◽  
Finite Amplitude ◽  
Small Scale ◽  
Drift Waves ◽  
Zonal Flows ◽  
Electron Temperature Gradient

AbstractThe generation of large-scale zonal flows by small-scale electrostatic drift waves in electron temperature gradient driven turbulence model is considered. The generation mechanism is based on the modulational instability of a finite amplitude monochromatic drift wave. The threshold and growth rate of the instability as well as the optimal spatial scale of zonal flow are obtained.

scholarly journals Investigation of the role of electron temperature gradient modes in electron heat transport in TCV plasmas

2019 ◽  
Vol 59 (12) ◽  
pp. 126017 ◽  
Author(s):  
A. Mariani ◽  
P. Mantica ◽  
S. Brunner ◽  
M. Fontana ◽  
A. Karpushov ◽  
...  
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Heat Transport ◽  
Electron Temperature Gradient ◽  
Electron Heat

Effect of electron temperature gradient on the modulational instability of drift waves and anomalous transport due to drift-wave turbulence

1988 ◽  
Vol 40 (2) ◽  
pp. 253-262 ◽  
Author(s):  
D. Majumdar
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Nonlinear Evolution ◽  
Modulational Instability ◽  
Wave Turbulence ◽  
Drift Waves ◽  
Multiple Time ◽  
Third Order ◽  
Drift Wave Turbulence ◽  
Electron Temperature Gradient

A nonlinear drift-mode equation including the effect of an electron-temperature gradient has been derived. To discuss modulational instability, we have obtained a nonlinear evolution equation for the drift mode from a third-order secularity-elimination condition using a multiple time- and space-scales technique. The effect of localized structure on the transport process has been investigated.

Comparison between fluid electron-temperature-gradient driven simulations and Tore Supra experiments on electron heat transport

2007 ◽  
Vol 73 (2) ◽  
pp. 199-206
Author(s):  
B. LABIT ◽  
M. OTTAVIANI
Keyword(s):  
Thermal Conductivity ◽  
Temperature Gradient ◽  
Electron Temperature ◽  
Heat Transport ◽  
Three Dimensional ◽  
High Electron ◽  
Present Contribution ◽  
Electron Thermal Conductivity ◽  
Electron Temperature Gradient ◽  
Electron Heat

Abstract.In recent years, much attention has been devoted to the electron-temperature-gradient (ETG) driven instability as a possible explanation for the high electron thermal conductivity found in most tokamaks. The present contribution assesses whether a specific three-dimensional fluid ETG model can reproduce the conductivity observed in the Tore Supra tokamak [Equipe Tore Supra (presented by R. Aymar) 1989 Plasma Physics and Controlled Nuclear Fusion Research (Proc. 12th Int. Conf., Nice, 1988, Vol. 1.) Vienna: IAEA, p. 9]. Although the model reproduces fairly well the observed critical gradient, a large discrepancy factor, of the order of 50, is found for the ratio between the experimental and the simulated conductivity. On the basis of this study, one must conclude that the electron heat transport cannot be explained only with a fluid ETG turbulence model.

Ion scale nonlinear interaction triggered by disparate scale electron temperature gradient mode

2015 ◽  
Vol 22 (5) ◽  
pp. 052301
Author(s):  
Chanho Moon ◽  
Tatsuya Kobayashi ◽  
Kimitaka Itoh ◽  
Rikizo Hatakeyama ◽  
Toshiro Kaneko
Keyword(s):  
Temperature Gradient ◽  
Electron Temperature ◽  
Nonlinear Interaction ◽  
Electron Temperature Gradient ◽  
Gradient Mode
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