Oblapenko, Georgii (2023) A low-variance particle collision scheme for variable weight DSMC simulations. In: SIAM Conference on Computational Science and Engineering CSE23 2023. SIAM CSE 23 (SIAM Conference on Computational Science and Engineering), 2023-02-26 - 2023-03-03, Amsterdam, Netherlands.
Full text not available from this repository.
Official URL: https://www.siam.org/conferences/cm/conference/cse23
Abstract
Numerical simulation of rarefied plasmas often makes use of Particle-in-Cell-Direct Simulation Monte Carlo (PIC-DSMC) codes [Birdsall, C. K., Particle-in-cell charged-particle simulations, plus Monte Carlo collisions with neutral atoms, PIC-MCC. Trans. Plasma Sci., 19(2), 1991], which simulate the motion of a large number of computational particles, each of which represents a large number of actual molecules, atoms, or electrons. Particle-particle and particle-surface collisions in such codes are performed in a stochastic manner: a single process is simulated for each collision, with the process being randomly chosen based on the probability of it taking place. In the present work a new collision and boundary condition simulation scheme, dubbed "event splitting" [Oblapenko, G. et al, Hedging direct simulation Monte Carlo bets via event splitting, J. Comput. Phys., 466, 2022], is investigated. It simulates multiple events simultaneously via splitting of the particles involved in the collision and has been shown to significantly reduce the level of stochastic noise in unsteady breakdown simulations. The scheme is applied to 1-D modelling of discharges in rarefied argon and helium plasmas, and compared to standard PIC-DSMC collision routines in terms of computational efficiency and numerical noise.
Item URL in elib: | https://elib.dlr.de/196160/ | ||||||||
---|---|---|---|---|---|---|---|---|---|
Document Type: | Conference or Workshop Item (Speech) | ||||||||
Title: | A low-variance particle collision scheme for variable weight DSMC simulations | ||||||||
Authors: |
| ||||||||
Date: | 2 March 2023 | ||||||||
Journal or Publication Title: | SIAM Conference on Computational Science and Engineering CSE23 2023 | ||||||||
Refereed publication: | Yes | ||||||||
Open Access: | No | ||||||||
Gold Open Access: | No | ||||||||
In SCOPUS: | No | ||||||||
In ISI Web of Science: | No | ||||||||
Editors: |
| ||||||||
Status: | Published | ||||||||
Keywords: | DSMC, event spliting | ||||||||
Event Title: | SIAM CSE 23 (SIAM Conference on Computational Science and Engineering) | ||||||||
Event Location: | Amsterdam, Netherlands | ||||||||
Event Type: | international Conference | ||||||||
Event Start Date: | 26 February 2023 | ||||||||
Event End Date: | 3 March 2023 | ||||||||
Organizer: | SIAM | ||||||||
HGF - Research field: | Aeronautics, Space and Transport | ||||||||
HGF - Program: | Space | ||||||||
HGF - Program Themes: | Space Transportation | ||||||||
DLR - Research area: | Raumfahrt | ||||||||
DLR - Program: | R RP - Space Transportation | ||||||||
DLR - Research theme (Project): | R - Reusable Space Systems and Propulsion Technology | ||||||||
Location: | Göttingen | ||||||||
Institutes and Institutions: | Institute for Aerodynamics and Flow Technology > Spacecraft, GO | ||||||||
Deposited By: | Hannemann, Dr.rer.nat. Volker | ||||||||
Deposited On: | 25 Aug 2023 14:16 | ||||||||
Last Modified: | 24 Apr 2024 20:56 |
Repository Staff Only: item control page