Smoothing and spatial grid effects in implicit particle simulation

Journal Article · Mon Oct 01 04:00:00 EDT 1984 · J. Comput. Phys.; (United States)

DOI:https://doi.org/10.1016/0021-9991(84)90083-4· OSTI ID:5991374

Cohen, B I; Langdon, A B; Friedman, A

Convergence and linear dispersion properties in implicit particle codes used in plasma simulatiion are investigated. Inconsistent spatial smoothing and simplified spatial differencing are shown to be closely related and degrade convergence and, if suitable care is not taken. stability. The convergence and dispersion properties of non-iterated, partially converged solution schemes are calculated. A careful combination of an implicit field solution with extrapolation of particle quantities using a previously calculated electric field need not degrade linear stability and dispersion characteristics. Even with some degradation of convergence, and with only one pass through the coupled particle and field equations on each time step, code performance can be entirely satisfactory if good stability and dispersion characterristics ae preserved.

• Research Organization: Lawrence Livermore National Laboratory, University of California, Livermore, California 94550
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5991374
• Journal Information: J. Comput. Phys.; (United States), Journal Name: J. Comput. Phys.; (United States) Vol. 56:1; ISSN JCTPA
• Country of Publication: United States
• Language: English

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