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

Parker, Jeffrey B.; LoDestro, Lynda L.; Told, Daniel; Merlo, Gabriele; Ricketson, Lee F.; Campos, Alejandro; Jenko, Frank; Hittinger, Jeffrey A. F.

doi:10.1088/1741-4326/aab5c8

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

Journal Article · Mon Mar 12 00:00:00 EDT 2018 · Nuclear Fusion

DOI:https://doi.org/10.1088/1741-4326/aab5c8· OSTI ID:1458659

^[1]; LoDestro, Lynda L. ^[1]; Told, Daniel ^[2];

^[3]; Ricketson, Lee F. ^[1]; Campos, Alejandro ^[1]; Jenko, Frank ^[4]; Hittinger, Jeffrey A. F. ^[1]

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Max-Planck-Institut für Plasmaphysik, Garching (Germany)
Univ. of California, Los Angeles, CA (United States)
Max-Planck-Institut für Plasmaphysik, Garching (Germany); Univ. of California, Los Angeles, CA (United States)

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 in this work, 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.

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Research Organization:: Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA); USDOE Office of Science (SC)

Grant/Contract Number:: AC52-07NA27344; AC02-05CH11231

OSTI ID:: 1458659

Report Number(s):: LLNL-JRNL-734141; 886124; TRN: US1901494

Journal Information:: Nuclear Fusion, Vol. 58, Issue 5; ISSN 0029-5515

Publisher:: IOP ScienceCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Cited By (2)

Investigation of a Multiple-Timescale Turbulence-Transport Coupling Method in the Presence of Random Fluctuations Parker, Jeffrey; LoDestro, Lynda; Campos, Alejandro Plasma, Vol. 1, Issue 1 https://doi.org/10.3390/plasma1010012	journal	July 2018
Investigation of a Multiple-Timescale Turbulence-Transport Coupling Method in the Presence of Random Fluctuations Parker, Jeffrey B.; LoDestro, Lynda L.; Campos, Alejandro arXiv https://doi.org/10.48550/arxiv.1807.04779	text	January 2018

Figures / Tables (4)

FIG. 1(p. 6)

0/L_T that develops toward the edge r/a ≈ 0:9 in Simulations 1 and 2 is an artifact of the buffer zone and does not have a direct effect (see the Supplemental Material for more details about the buffer zone)." data-ostiid="1458659">

FIG. 1(p. 6) FIG. 1

TABLE I(p. 6)

FIG. 2(p. 7)

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