On the collision detection for ellipsoidal particles in turbulence

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

Research output: Chapter in Book/Report/Conference proceedingConference contributionAcademicpeer-review

4 Citations (Scopus)

Abstract

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.

Original languageEnglish
Title of host publicationAmerican Society of Mechanical Engineers, Fluids Engineering Division (Publication) FEDSM
PublisherAmerican Society of Mechanical Engineers
Number of pages9
Volume1D
ISBN (Print)9780791846247
DOIs
Publication statusPublished - 2014
Event4th ASME Joint US-European Fluids Engineering Division Summer Meeting (FEDSM 2014) - Chicago, United States
Duration: 3 Aug 20147 Aug 2014
Conference number: 4

Conference

Conference4th ASME Joint US-European Fluids Engineering Division Summer Meeting (FEDSM 2014)
Abbreviated titleFEDSM 2014
CountryUnited States
CityChicago
Period3/08/147/08/14
OtherColocated with the 12th ASME International Conference on Nanochannels, Microchannels, and Minichannels (ICNMM 2014)

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