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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. Rarefied Gas Dynamics: 27th International Symposium, 10. - 15. Jul. 2010, Monterey, USA.

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Abstract

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.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:A Voronoi Grid and a Particle Tracking Algorithm for DSMC
Authors:
AuthorsInstitution or Email of Authors
Stollmeier, Frankfrank.stollmeier@dlr.de
Grabe, Martinmartin.grabe@dlr.de
Date:12 July 2011
Refereed publication:No
In ISI Web of Science:No
Series Name:Conference Proceedings
Status:Published
Keywords:DSMC, particle tracking, mesh
Event Title:Rarefied Gas Dynamics: 27th International Symposium
Event Location:Monterey, USA
Event Type:international Conference
Event Dates:10. - 15. Jul. 2010
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 - Grundlagen Raumtransport - numerische Verfahren (old)
Location: Göttingen
Institutes and Institutions:Institute of Aerodynamics and Flow Technology > Spacecraft
Deposited By: Martin Grabe
Deposited On:30 Nov 2011 11:56
Last Modified:12 Dec 2013 21:05

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