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Edge turbulence and divertor heat flux width simulations of Alcator C-Mod discharges using an electromagnetic two-fluid model
Chen, B.1,2; Xu, X. Q.2; Xia, T. Y.2,3; Porkolab, M.4; Edlund, E.4; LaBombard, B.4; Terry, J.4; Hughes, J. W.4; Mao, S. F.1; Ye, M. Y.1; Wan, Y. X.1
2017-11-01
Source PublicationNUCLEAR FUSION
Volume57Issue:11
AbstractThe BOUT++ code has been exploited in order to improve the understanding of the role of turbulent modes in controlling edge transport and resulting scaling of the scrape-off layer (SOL) heat flux width. For the C-Mod enhanced D-alpha (EDA) H-mode discharges, BOUT++ six-field two-fluid nonlinear simulations show a reasonable agreement of upstream turbulence and divertor target heat flux behavior: (a) the simulated quasi-coherent modes show consistent characteristics of the frequency versus poloidal wave number spectra of the electromagnetic fluctuations when compared with experimental measurements: frequencies are around 60-120 kHz (experiment: about 70-110 kHz), k(theta) are around 2.0 cm(-1) which is similar to the phase contrast imaging data; (b) linear spectrum analysis is consistent with the nonlinear phase relationship calculation which indicates the dominance of resistive-ballooning modes and drift-Alfven wave instabilities; (c) the SOL heat flux width lambda(q) versus current I-p scaling is reproduced by turbulent transport: the simulations yield similar lambda q to experimental measurements within a factor of 2. However the magnitudes of divertor heat fluxes can be varied, depending on the physics models, sources and sinks, sheath boundary conditions, or flux limiting coefficient; (d) Simple estimate by the '2-point model' for lambda(q) is consistent with simulation. Moreover, blobby turbulent spreading is confirmed for these relatively high B-p shots.
SubtypeArticle
KeywordDivertor Heat Flux Width Bout Plus C-mod Qcms
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationCSC(201506340019) ; CSC(201506340019) ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy ; U.S. Department of Energy ; DoE(DE-FC02-99ER54512) ; DoE(DE-FC02-99ER54512) ; National Natural Science Foundation of China(11375191 ; National Natural Science Foundation of China(11375191 ; LLNL-JRNL-722400) ; LLNL-JRNL-722400) ; 11405215 ; 11405215 ; 11675217) ; 11675217) ; CSC(201506340019) ; CSC(201506340019) ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy ; U.S. Department of Energy ; DoE(DE-FC02-99ER54512) ; DoE(DE-FC02-99ER54512) ; National Natural Science Foundation of China(11375191 ; National Natural Science Foundation of China(11375191 ; LLNL-JRNL-722400) ; LLNL-JRNL-722400) ; 11405215 ; 11405215 ; 11675217) ; 11675217)
DOI10.1088/1741-4326/aa7d46
WOS KeywordSCRAPE-OFF LAYER ; CONFINEMENT ; TRANSPORT ; TOKAMAK ; POWER
Indexed BySCI
Language英语
Funding OrganizationCSC(201506340019) ; CSC(201506340019) ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy ; U.S. Department of Energy ; DoE(DE-FC02-99ER54512) ; DoE(DE-FC02-99ER54512) ; National Natural Science Foundation of China(11375191 ; National Natural Science Foundation of China(11375191 ; LLNL-JRNL-722400) ; LLNL-JRNL-722400) ; 11405215 ; 11405215 ; 11675217) ; 11675217) ; CSC(201506340019) ; CSC(201506340019) ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy by Lawrence Livermore National Laboratory(DE-AC52-07NA27344 ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy, Office of Science, Office of Fusion Energy Sciences ; U.S. Department of Energy ; U.S. Department of Energy ; DoE(DE-FC02-99ER54512) ; DoE(DE-FC02-99ER54512) ; National Natural Science Foundation of China(11375191 ; National Natural Science Foundation of China(11375191 ; LLNL-JRNL-722400) ; LLNL-JRNL-722400) ; 11405215 ; 11405215 ; 11675217) ; 11675217)
WOS Research AreaPhysics
WOS SubjectPhysics, Fluids & Plasmas
WOS IDWOS:000407442100003
Citation statistics
Document Type期刊论文
Identifierhttp://ir.hfcas.ac.cn:8080/handle/334002/33576
Collection中科院等离子体物理研究所
Affiliation1.Univ Sci & Technol China, Sch Nucl Sci & Technol, Hefei, Anhui, Peoples R China
2.Lawrence Livermore Natl Lab, Livermore, CA 94550 USA
3.Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China
4.MIT, Plasma Sci & Fus Ctr, 77 Massachusetts Ave, Cambridge, MA 02139 USA
Recommended Citation
GB/T 7714
Chen, B.,Xu, X. Q.,Xia, T. Y.,et al. Edge turbulence and divertor heat flux width simulations of Alcator C-Mod discharges using an electromagnetic two-fluid model[J]. NUCLEAR FUSION,2017,57(11).
APA Chen, B..,Xu, X. Q..,Xia, T. Y..,Porkolab, M..,Edlund, E..,...&Wan, Y. X..(2017).Edge turbulence and divertor heat flux width simulations of Alcator C-Mod discharges using an electromagnetic two-fluid model.NUCLEAR FUSION,57(11).
MLA Chen, B.,et al."Edge turbulence and divertor heat flux width simulations of Alcator C-Mod discharges using an electromagnetic two-fluid model".NUCLEAR FUSION 57.11(2017).
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