Nonlinear simulations of peeling-ballooning modes with anomalous electron viscosity and their role in edge localized mode crashes
Abstract
A minimum set of equations based on the peeling-ballooning (P-B) model with nonideal physics effects (diamagnetic drift, E×B drift, resistivity, and anomalous electron viscosity) is found to simulate pedestal collapse when using the new BOUT++ simulation code, developed in part from the original fluid edge code BOUT. Nonlinear simulations of P-B modes demonstrate that the P-B modes trigger magnetic reconnection, which leads to the pedestal collapse. With the addition of a model of the anomalous electron viscosity under the assumption that the electron viscosity is comparable to the anomalous electron thermal diffusivity, it is found from simulations using a realistic high-Lundquist number that the pedestal collapse is limited to the edge region and the edge localized mode (ELM) size is about 5–10% of the pedestal stored energy. Furthermore, this is consistent with many observations of large ELMs.
- Authors:
-
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- Univ. of York, York (United Kingdom)
- General Atomics, San Diego, CA (United States)
- Publication Date:
- Research Org.:
- Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1238237
- Report Number(s):
- LLNL-JRNL-426985
Journal ID: ISSN 0031-9007; PRLTAO; TRN: US1600619
- Grant/Contract Number:
- AC52-07NA27344
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 105; Journal Issue: 17; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 70 PLASMA PHYSICS AND FUSION
Citation Formats
Xu, X. Q., Dudson, B., Snyder, P. B., Umansky, M. V., and Wilson, H. Nonlinear simulations of peeling-ballooning modes with anomalous electron viscosity and their role in edge localized mode crashes. United States: N. p., 2010.
Web. doi:10.1103/PhysRevLett.105.175005.
Xu, X. Q., Dudson, B., Snyder, P. B., Umansky, M. V., & Wilson, H. Nonlinear simulations of peeling-ballooning modes with anomalous electron viscosity and their role in edge localized mode crashes. United States. https://doi.org/10.1103/PhysRevLett.105.175005
Xu, X. Q., Dudson, B., Snyder, P. B., Umansky, M. V., and Wilson, H. 2010.
"Nonlinear simulations of peeling-ballooning modes with anomalous electron viscosity and their role in edge localized mode crashes". United States. https://doi.org/10.1103/PhysRevLett.105.175005. https://www.osti.gov/servlets/purl/1238237.
@article{osti_1238237,
title = {Nonlinear simulations of peeling-ballooning modes with anomalous electron viscosity and their role in edge localized mode crashes},
author = {Xu, X. Q. and Dudson, B. and Snyder, P. B. and Umansky, M. V. and Wilson, H.},
abstractNote = {A minimum set of equations based on the peeling-ballooning (P-B) model with nonideal physics effects (diamagnetic drift, E×B drift, resistivity, and anomalous electron viscosity) is found to simulate pedestal collapse when using the new BOUT++ simulation code, developed in part from the original fluid edge code BOUT. Nonlinear simulations of P-B modes demonstrate that the P-B modes trigger magnetic reconnection, which leads to the pedestal collapse. With the addition of a model of the anomalous electron viscosity under the assumption that the electron viscosity is comparable to the anomalous electron thermal diffusivity, it is found from simulations using a realistic high-Lundquist number that the pedestal collapse is limited to the edge region and the edge localized mode (ELM) size is about 5–10% of the pedestal stored energy. Furthermore, this is consistent with many observations of large ELMs.},
doi = {10.1103/PhysRevLett.105.175005},
url = {https://www.osti.gov/biblio/1238237},
journal = {Physical Review Letters},
issn = {0031-9007},
number = 17,
volume = 105,
place = {United States},
year = {Fri Oct 22 00:00:00 EDT 2010},
month = {Fri Oct 22 00:00:00 EDT 2010}
}
Web of Science
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