Center for Extended Magnetohydrodynamic Modeling (CEMM, UWMadison Physics)
Abstract
The Center for Extended Magnetohydrodynamic Modeling (CEMM) focused on the further development, verification, validation, and application of two scientific computation programs, the NIMROD and M3DC1 codes, for modeling macroscopic dynamics in magnetized plasma. Both NIMROD and M3DC1 solve the mathematical equations that model twofluid 3D magnetohydrodynamic (MHD). They are designed and optimized to be efficient and accurate for toroidal confinement physics calculations. The effort improved the fidelity of the physics models, the realism of the treatment of the surrounding vessel, coils, and other structures, the accuracy and efficiency of the algorithms, and the ability to scale calculations to thousands of processors in order to take advantage of leadingedge computers. The primary application areas of Resonant Magnetic Perturbations (RMP), Edge Harmonic Oscillations (EHO), Edge Localized Modes (ELMs), Disruption Studies, Sawteeth and Stationary States, and Kinetic MHD and Neoclassical Tearing Modes (NTM) are of concern for the international ITER experiment, which is under construction in France. The component of CEMM that is described in this report applied recently developed aspects of NIMROD to sawtooth and EHO dynamics, which occur in tokamak plasma confinement systems. In particular, the effort researched energeticparticle, twofluid, and plasmaflow effects. The work included an effort to validate energeticparticlemore »
 Authors:

 Univ. of WisconsinMadison, Madison, WI (United States)
 Publication Date:
 Research Org.:
 Univ. of WisconsinMadison, Madison, WI (United States)
 Sponsoring Org.:
 USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC24)
 OSTI Identifier:
 1438177
 Report Number(s):
 DOE/ER54974
 DOE Contract Number:
 FC0208ER54974
 Resource Type:
 Technical Report
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; plasma computation; magnetohydrodynamic stability
Citation Formats
Sovinec, C. R. Center for Extended Magnetohydrodynamic Modeling (CEMM, UWMadison Physics). United States: N. p., 2018.
Web. doi:10.2172/1438177.
Sovinec, C. R. Center for Extended Magnetohydrodynamic Modeling (CEMM, UWMadison Physics). United States. doi:10.2172/1438177.
Sovinec, C. R. Fri .
"Center for Extended Magnetohydrodynamic Modeling (CEMM, UWMadison Physics)". United States. doi:10.2172/1438177. https://www.osti.gov/servlets/purl/1438177.
@article{osti_1438177,
title = {Center for Extended Magnetohydrodynamic Modeling (CEMM, UWMadison Physics)},
author = {Sovinec, C. R.},
abstractNote = {The Center for Extended Magnetohydrodynamic Modeling (CEMM) focused on the further development, verification, validation, and application of two scientific computation programs, the NIMROD and M3DC1 codes, for modeling macroscopic dynamics in magnetized plasma. Both NIMROD and M3DC1 solve the mathematical equations that model twofluid 3D magnetohydrodynamic (MHD). They are designed and optimized to be efficient and accurate for toroidal confinement physics calculations. The effort improved the fidelity of the physics models, the realism of the treatment of the surrounding vessel, coils, and other structures, the accuracy and efficiency of the algorithms, and the ability to scale calculations to thousands of processors in order to take advantage of leadingedge computers. The primary application areas of Resonant Magnetic Perturbations (RMP), Edge Harmonic Oscillations (EHO), Edge Localized Modes (ELMs), Disruption Studies, Sawteeth and Stationary States, and Kinetic MHD and Neoclassical Tearing Modes (NTM) are of concern for the international ITER experiment, which is under construction in France. The component of CEMM that is described in this report applied recently developed aspects of NIMROD to sawtooth and EHO dynamics, which occur in tokamak plasma confinement systems. In particular, the effort researched energeticparticle, twofluid, and plasmaflow effects. The work included an effort to validate energeticparticle modeling using laboratory measurements and previous analysis of giant sawtooth oscillations, where energetic particles temporarily stabilize the system. A side effort that grew out of this work was benchmarking of the slabgeometry ion temperature gradient (ITG) instability computed by NIMROD's twofluid modeling against analytical results. These fluidmodel results were also compared with results from kinetic modeling to help quantify the range of validity for the twofluid model. The EHO simulations show that sheared plasma flow plays a crucial role in saturating the underlying MHD instability.},
doi = {10.2172/1438177},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}