Parallel plasma fluid turbulence calculations

Technical Report · Sat Dec 31 00:00:00 EST 1994

DOI:https://doi.org/10.2172/10118166· OSTI ID:10118166

Leboeuf, J N; Carreras, B A; Charlton, L A; Drake, J B; Lynch, V E; Newman, D E; Sidikman, K L; Spong, D A

The study of plasma turbulence and transport is a complex problem of critical importance for fusion-relevant plasmas. To this day, the fluid treatment of plasma dynamics is the best approach to realistic physics at the high resolution required for certain experimentally relevant calculations. Core and edge turbulence in a magnetic fusion device have been modeled using state-of-the-art, nonlinear, three-dimensional, initial-value fluid and gyrofluid codes. Parallel implementation of these models on diverse platforms--vector parallel (National Energy Research Supercomputer Center`s CRAY Y-MP C90), massively parallel (Intel Paragon XP/S 35), and serial parallel (clusters of high-performance workstations using the Parallel Virtual Machine protocol)--offers a variety of paths to high resolution and significant improvements in real-time efficiency, each with its own advantages. The largest and most efficient calculations have been performed at the 200 Mword memory limit on the C90 in dedicated mode, where an overlap of 12 to 13 out of a maximum of 16 processors has been achieved with a gyrofluid model of core fluctuations. The richness of the physics captured by these calculations is commensurate with the increased resolution and efficiency and is limited only by the ingenuity brought to the analysis of the massive amounts of data generated.

• Research Organization: Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 10118166
• Report Number(s): CONF-9407126-3; ON: DE95006741; TRN: AHC29508%%200
• Resource Relation: Conference: 2. DOE-Energy Research Power users symposium,Rockville, MD (United States),12 Jul 1994; Other Information: PBD: [1994]
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
PLASMA SIMULATION
PARALLEL PROCESSING
TOKAMAK DEVICES
TURBULENCE
PLASMA FLUID EQUATIONS
SUPERCOMPUTERS
PERFORMANCE
PARTICLE LOSSES
THEORETICAL DATA
THREE-DIMENSIONAL CALCULATIONS
700340
990200
PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
MATHEMATICS AND COMPUTERS