Massively Parallel Three-Dimensional Toroidal Gyrokinetic Flux-Tube Turbulence Simulation
✍ Scribed by Charlson C. Kim; Scott E. Parker
- Book ID
- 102586809
- Publisher
- Elsevier Science
- Year
- 2000
- Tongue
- English
- Weight
- 178 KB
- Volume
- 161
- Category
- Article
- ISSN
- 0021-9991
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✦ Synopsis
A massively parallel three-dimensional nonlinear gyrokinetic flux-tube simulation model is discussed. This simulation is used to study turbulent heat transport in core tokamak fusion plasmas. This model allows for high resolution simulations of ion-temperature-gradient-driven turbulence using realistic plasma parameters assuming locality of the turbulent fluctuations. The simulation model, computational techniques, and parallel algorithms are discussed. The use of field-aligned coordinates allows for a natural domain decomposition in the direction along the magnetic field with good parallel performance. Digital filtering along the field line maintains proper toroidal and poloidal periodicity. A new approach to parallelization, "domain cloning," is presented. Domain cloning is another layer of parallelization. It is an alternative to a two-dimensional domain decomposition and may be useful for clustered symmetric-multiprocessor machines. Performance results are presented for two high-performance massively parallel computers.