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Controlling Self-Force for Unstructured Particle-in-Cell (PIC) Codes.
- Source :
- IEEE Transactions on Plasma Science; Apr2014 Part 2, Vol. 42 Issue 5, p1189-1194, 6p
- Publication Year :
- 2014
-
Abstract
- A new algorithm was developed, which reduces the self-force in particle-in-cell codes on unstructured meshes in a predictable and controllable way. This is accomplished by computing a charge density weighting function for a particle, which reproduces the Green's function solution to Poisson's equation at nodes when using a standard finite element method methodology. This provides a superior local potential and allows for particle–particle particle-mesh techniques to be used to subtract off local force contributions, including fictitious self-forces resulting in accurate long-range forces on a particle and improved local Coulomb collisions. Local physical forces are then computed using the Green's function on local particle pairs and added to the long-range forces. Results were shown with up to five orders reduction in self-force and superior intraparticle forces for two test cases. [ABSTRACT FROM PUBLISHER]
Details
- Language :
- English
- ISSN :
- 00933813
- Volume :
- 42
- Issue :
- 5
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Plasma Science
- Publication Type :
- Academic Journal
- Accession number :
- 95969837
- Full Text :
- https://doi.org/10.1109/TPS.2014.2313515