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Plasma Simulation Studies Using Multilevel Physics Model
Wonchull Park and Xianzhu Tang
Princeton Plasma Physics Laboratory
Hosted by Lois Curfman McInnes
2:00 PM, May 19, 1999
Building 221, Room A-216
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| Abstract |
The question of how to proceed towards ever more realistic plasma
simulation studies using ever increasing computing power is addressed. A satisfactory
response to this challenge requires at least three components: increasingly
realistic and tractable physics models, efficient discrete representation of the physics
models, and efficient numerical solution process using MPP. In the M3D (Multilevel 3D)
project, we have developed a hierarchy of physics models that resolve increasingly
complete subsets of phase-spaces and are thus increasingly more realistic. These are
various fluid and hybrid particle/fluid models. In plasmas, collisions are often
infrequent, and fluid models are supplemented by particles to account for velocity space
resonances. Simulation results using each physics model will be presented. Unstructured
mesh finite elements are used for efficient representation of variables. Quasi-implicit
scheme is used where the most time step limiting wave is isolated and solved implicitly.
Parallelization has been done on a shared-memory Origin2000, and a good scalability has
been obtained. Currently we are writing a new MPI-based version of the code, ParM3D, for
general MPP machines utilizing PETSc. |
