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Title: Turbulent transport of toroidal angular momentum in fusion plasmas

Abstract

Global nonlinear gyrokinetic simulations of ion temperature gradient (ITG) and collisionless trapped electron mode (CTEM) turbulence find significant spinning up of a plasma in the directions opposite for CTEM and ITG turbulence. The outward momentum convection by the particle flux could be strong enough to overcome the inward momentum pinch and reverse the radial direction of the convective momentum flux. Momentum pinch velocity shows no explicit dependence on background temperature, while it is significantly affected by steepening the background density. Convective momentum fluxes are generally smaller in the CTEM turbulence than the ITG turbulence, while the intrinsic Prandtl number is similar or slightly larger in the CTEM turbulence.

Authors:
 [1];  [2];  [1]
  1. Univ. of California, Irvine, CA (United States)
  2. Univ. of California, Irvine, CA (United States) ; Peking Univ., Beijing (China)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1564856
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 19; Journal Issue: 1; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; Physics

Citation Formats

Holod, I., Lin, Z., and Xiao, Y. Turbulent transport of toroidal angular momentum in fusion plasmas. United States: N. p., 2012. Web. doi:10.1063/1.3677886.
Holod, I., Lin, Z., & Xiao, Y. Turbulent transport of toroidal angular momentum in fusion plasmas. United States. doi:10.1063/1.3677886.
Holod, I., Lin, Z., and Xiao, Y. Thu . "Turbulent transport of toroidal angular momentum in fusion plasmas". United States. doi:10.1063/1.3677886. https://www.osti.gov/servlets/purl/1564856.
@article{osti_1564856,
title = {Turbulent transport of toroidal angular momentum in fusion plasmas},
author = {Holod, I. and Lin, Z. and Xiao, Y.},
abstractNote = {Global nonlinear gyrokinetic simulations of ion temperature gradient (ITG) and collisionless trapped electron mode (CTEM) turbulence find significant spinning up of a plasma in the directions opposite for CTEM and ITG turbulence. The outward momentum convection by the particle flux could be strong enough to overcome the inward momentum pinch and reverse the radial direction of the convective momentum flux. Momentum pinch velocity shows no explicit dependence on background temperature, while it is significantly affected by steepening the background density. Convective momentum fluxes are generally smaller in the CTEM turbulence than the ITG turbulence, while the intrinsic Prandtl number is similar or slightly larger in the CTEM turbulence.},
doi = {10.1063/1.3677886},
journal = {Physics of Plasmas},
number = 1,
volume = 19,
place = {United States},
year = {2012},
month = {1}
}

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Cited by: 5 works
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