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Gyrokinetic PIC Simulation on Massively Parallel Processors

Timothy J. Williams
Andris Dimits

National Energy Research Supercomputer Center
LLNL MFE Theory and Computations


PostScript: gk.ps

Overview
Particle In Cell (PIC) Simulation of Plasmas
Gathers and Scatters in PIC
Gyrokinetic PIC
Slab Geometry for Tokamak Core
The Need For Speed
Early Parallel Programming Efforts
Domain Decomposition and Message Passing
Guard Layers
FFT for Poisson Solve
Outline of a Timestep
Performance Model
Performance Predictions and Measurements
Nice Work! Too Bad It's Irrelevant Now.
Flux Tube Geometry
Quasiballooning Coordinates
Numerical Methods for QBC
Domain Decomposition for Flux Tube
Parallel Field Solution
How Much Pain to Face the Present?
Parallel I/O
Parallel I/O (cont'd)
NetCDF Library for I/O
NetCDF for Parallel I/O

Gyrokinetic PIC Simulation on Massively Parallel Processors - (lecture given 6/23/95)
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