On the collision detection for ellipsoidal particles in turbulence

C. Siewert, R.P.J. Kunnen, M. Meinke, W. Schröder

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4 Citaten (Scopus)

Samenvatting

Collisions of small and heavy non-spherical particles settling in a turbulent environment are very important to various fields of physics and engineering. However, in contrast to spherical particles the collision probabilities are virtually unknown. In this study we focus on a very important condition for the numerical determination of collision probabilities: The collision detection. We discuss the need for efficient strategies to narrow down the number of possible collision pairs and compare three collision detection methods for ellipsoidal particles. We derive an analytical formula for the collision probability in the case of gravitational settling and validate the collision detection methods with this. Finally, we present statistics of the accuracy and efficiency of the methods. For the case of ellipsoidal particles in turbulence we find that the continuous collision detection with neglected rotation within a time step is the optimal trade-off between accuracy and efficiency.

Originele taal-2Engels
TitelAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
UitgeverijAmerican Society of Mechanical Engineers
Aantal pagina's9
Volume1D
ISBN van geprinte versie9780791846247
DOI's
StatusGepubliceerd - 2014
Evenement4th ASME Joint US-European Fluids Engineering Division Summer Meeting (FEDSM 2014) - Chicago, Verenigde Staten van Amerika
Duur: 3 aug 20147 aug 2014
Congresnummer: 4

Congres

Congres4th ASME Joint US-European Fluids Engineering Division Summer Meeting (FEDSM 2014)
Verkorte titelFEDSM 2014
LandVerenigde Staten van Amerika
StadChicago
Periode3/08/147/08/14

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