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A Voronoi Grid and a Particle Tracking Algorithm for DSMC

Stollmeier, Frank and Grabe, Martin (2011) A Voronoi Grid and a Particle Tracking Algorithm for DSMC. AIP| Conference Proceedings|1333 (331). American Institute of Physics. doi: 10.1063/1.3562670. ISBN 978-0-7354-0889-0. ISSN 0094-243X.

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Official URL: http://dx.doi.org/10.1063/1.3562670


The DSMC method simulates a gas by three uncoupled steps: moving representative particles through a physical domain, performing probabilistic collisions and estimating the macroscopic state by ensemble averaging. In order to ease computational treatment of these three steps it is convenient to discretize the space with a grid that fits into the boundaries of the physical domain. For efficient particle tracking it is useful that the cells of this grid are convex polyhedra which preferably have no indirect neighbors. To reduce discretization errors in the collision step and to take reasonable averages the cells should be nearly isotropic, whereas their volume is primarily determined by the local flow gradients. Especially the latter condition requires the density of the grid to be continuously adaptable in space and time. We show that grids derived from Voronoi diagrams fulfill these requirements very well.

Item URL in elib:https://elib.dlr.de/71609/
Document Type:Editorship of Proceedings
Additional Information:PART ONE
Title:A Voronoi Grid and a Particle Tracking Algorithm for DSMC
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Grabe, MartinUNSPECIFIEDhttps://orcid.org/0000-0003-0361-2734UNSPECIFIED
Refereed publication:Yes
Open Access:Yes
Gold Open Access:Yes
In ISI Web of Science:No
Page Range:pp. 331-336
Publisher:American Institute of Physics
Series Name:AIP| Conference Proceedings|1333
Keywords: DSMC, particle tracking, mesh
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W RP - Raumtransport
DLR - Research area:Space
DLR - Program:W RP - Raumtransport
DLR - Research theme (Project):W - Raumfahrzeugsysteme - Numerische Verfahren und Simulation (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Micknaus, Ilka
Deposited On:05 Dec 2011 15:08
Last Modified:24 Apr 2024 19:37

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