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DTSTAMP:20181221T160726Z
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DTSTART;TZID=America/Chicago:20181111T142400
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UID:submissions.supercomputing.org_SC18_sess160_ws_whpc122@linklings.com
SUMMARY:Kinetic Simulations of Plasma Turbulence Using the Discontinuous G
alerkin Finite Element Method
DESCRIPTION:Workshop\nDiversity, Education, Hot Topics, Workshop Reg Pass\
n\nKinetic Simulations of Plasma Turbulence Using the Discontinuous Galerk
in Finite Element Method\n\nBernard, Hakim, Hammett, Shi, Francisquez...\n
\nWe use an advanced computational framework called Gkeyll to simulate pla
sma turbulence in the edge of magnetic confinement fusion experiments. In
these experiments, charged particles gyrate quickly around magnetic field
lines. When time scales of interest are much greater than the gyration per
iod and the wavelengths of disturbances parallel to field lines are much l
arger than the gyro-radius, one can average over the gyro-period of the pl
asma particles and effectively model them as rings. This gyrokinetic formu
lation reduces the particlesâ€™ probability density function from six dimens
ions (three spatial and three velocity) to five (three spatial and three v
elocity) and is the model we use in our research. Gkeyll uses the disconti
nuous Galerkin (DG) finite element method, which combines the benefits of
finite element methods, such as high-order accuracy, with those of finite
volume methods, including locality of data. DG also allows for conservativ
e schemes. We have benchmarked the code by modeling the Texas Heliamk, a b
asic plasma physics experiment, and comparing with experimental data. We h
ave also developed a new and faster version of the code with improved cons
ervation properties. This research demonstrates Gkeyll's progress toward 5
D simulations of the edge region of fusion devices.
URL:https://sc18.supercomputing.org/presentation/?id=ws_whpc122&sess=sess1
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