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Title: Critical transition for the edge shear layer formation: Comparison of model and experiment

Abstract

The experimental results for the emergence of the plasma edge shear flow layer in TJ-II [C. Alehaldre et al.Fusion Technol. 17, 131 (1990)] can be explained using a simple model for a second-order transition based on the sheared flow amplification by Reynolds stress and turbulence suppression by shearing. In the dynamics of the model, the resistive interchange instability is used. This model gives power dependence on density gradients before and after the transition, consistent with experiment.

Authors:
; ; ;  [1];  [2];  [2]
  1. Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830 (United States)
  2. (Spain)
Publication Date:
OSTI Identifier:
20860443
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physics of Plasmas; Journal Volume: 13; Journal Issue: 12; Other Information: DOI: 10.1063/1.2405344; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; AMPLIFICATION; BOUNDARY LAYERS; COMPARATIVE EVALUATIONS; FLUCTUATIONS; FLUTE INSTABILITY; PLASMA; PLASMA CONFINEMENT; PLASMA DENSITY; REYNOLDS NUMBER; SHEAR; STELLARATORS; STRESSES; TURBULENCE

Citation Formats

Carreras, B. A., Garcia, L., Pedrosa, M. A., Hidalgo, C., Universidad Carlos III, 28911 Leganes, Madrid, and Laboratorio Nacional de Fusion, Asociacion EURATOM-CIEMAT, 28040 Madrid. Critical transition for the edge shear layer formation: Comparison of model and experiment. United States: N. p., 2006. Web. doi:10.1063/1.2405344.
Carreras, B. A., Garcia, L., Pedrosa, M. A., Hidalgo, C., Universidad Carlos III, 28911 Leganes, Madrid, & Laboratorio Nacional de Fusion, Asociacion EURATOM-CIEMAT, 28040 Madrid. Critical transition for the edge shear layer formation: Comparison of model and experiment. United States. doi:10.1063/1.2405344.
Carreras, B. A., Garcia, L., Pedrosa, M. A., Hidalgo, C., Universidad Carlos III, 28911 Leganes, Madrid, and Laboratorio Nacional de Fusion, Asociacion EURATOM-CIEMAT, 28040 Madrid. Fri . "Critical transition for the edge shear layer formation: Comparison of model and experiment". United States. doi:10.1063/1.2405344.
@article{osti_20860443,
title = {Critical transition for the edge shear layer formation: Comparison of model and experiment},
author = {Carreras, B. A. and Garcia, L. and Pedrosa, M. A. and Hidalgo, C. and Universidad Carlos III, 28911 Leganes, Madrid and Laboratorio Nacional de Fusion, Asociacion EURATOM-CIEMAT, 28040 Madrid},
abstractNote = {The experimental results for the emergence of the plasma edge shear flow layer in TJ-II [C. Alehaldre et al.Fusion Technol. 17, 131 (1990)] can be explained using a simple model for a second-order transition based on the sheared flow amplification by Reynolds stress and turbulence suppression by shearing. In the dynamics of the model, the resistive interchange instability is used. This model gives power dependence on density gradients before and after the transition, consistent with experiment.},
doi = {10.1063/1.2405344},
journal = {Physics of Plasmas},
number = 12,
volume = 13,
place = {United States},
year = {Fri Dec 15 00:00:00 EST 2006},
month = {Fri Dec 15 00:00:00 EST 2006}
}