A Non-Negative Least Squares-based Approach for Moment-Preserving Particle Merging
Plasma Physics
2024-12-18 v1 Computational Physics
Abstract
In the present work, a novel particle merging scheme is proposed for PIC-DSMC simulations, based on the solution of a Non-negative Least Squares problem. The merging algorithm conserves arbitrary moments of the velocity distribution function, and a collision rate-conserving version of the algorithm is presented as well. Numerical simulations show excellent performance of the merging algorithm in terms of accuracy.
Keywords
Cite
@article{arxiv.2412.12354,
title = {A Non-Negative Least Squares-based Approach for Moment-Preserving Particle Merging},
author = {Georgii Oblapenko},
journal= {arXiv preprint arXiv:2412.12354},
year = {2024}
}