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Title: Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach

Abstract

The vast separation dividing the characteristic times of energy confinement and turbulence in the core of toroidal plasmas makes first-principles prediction on long timescales extremely challenging. Here we report the demonstration of a multiple-timescale method that enables coupling global gyrokinetic simulations with a transport solver to calculate the evolution of the self-consistent temperature profile. This method, which exhibits resiliency to the intrinsic fluctuations arising in turbulence simulations, holds potential for integrating nonlocal gyrokinetic turbulence simulations into predictive, whole-device models.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [3];  [1];  [1];  [4];  [1]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Max Planck Inst. fur Plasmaphysik, Garching (Germany)
  3. Univ. of California, Los Angeles, CA (United States)
  4. Max Planck Inst. fur Plasmaphysik, Garching (Germany); Univ. of California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
Lawrence Berkeley National Laboratory-National Energy Research Scientific Computing Center (NERSC)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1526631
DOE Contract Number:  
AC52-07NA27344; AC02-05CH11231
Resource Type:
Journal Article
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 58; Journal Issue: 5; Journal ID: ISSN 0029-5515
Country of Publication:
United States
Language:
English

Citation Formats

Parker, Jeffrey B., LoDestro, Lynda L., Told, Daniel, Merlo, Gabriele, Ricketson, Lee F., Campos, Alejandro, Jenko, Frank, and Hittinger, Jeffrey A. F. Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach. United States: N. p., 2018. Web. doi:10.1088/1741-4326/aab5c8.
Parker, Jeffrey B., LoDestro, Lynda L., Told, Daniel, Merlo, Gabriele, Ricketson, Lee F., Campos, Alejandro, Jenko, Frank, & Hittinger, Jeffrey A. F. Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach. United States. doi:10.1088/1741-4326/aab5c8.
Parker, Jeffrey B., LoDestro, Lynda L., Told, Daniel, Merlo, Gabriele, Ricketson, Lee F., Campos, Alejandro, Jenko, Frank, and Hittinger, Jeffrey A. F. Mon . "Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach". United States. doi:10.1088/1741-4326/aab5c8.
@article{osti_1526631,
title = {Bringing global gyrokinetic turbulence simulations to the transport timescale using a multiscale approach},
author = {Parker, Jeffrey B. and LoDestro, Lynda L. and Told, Daniel and Merlo, Gabriele and Ricketson, Lee F. and Campos, Alejandro and Jenko, Frank and Hittinger, Jeffrey A. F.},
abstractNote = {The vast separation dividing the characteristic times of energy confinement and turbulence in the core of toroidal plasmas makes first-principles prediction on long timescales extremely challenging. Here we report the demonstration of a multiple-timescale method that enables coupling global gyrokinetic simulations with a transport solver to calculate the evolution of the self-consistent temperature profile. This method, which exhibits resiliency to the intrinsic fluctuations arising in turbulence simulations, holds potential for integrating nonlocal gyrokinetic turbulence simulations into predictive, whole-device models.},
doi = {10.1088/1741-4326/aab5c8},
journal = {Nuclear Fusion},
issn = {0029-5515},
number = 5,
volume = 58,
place = {United States},
year = {2018},
month = {3}
}