Simulation of particle mixing in turbulent channel flow due to intrinsic fluid velocity fluctuation

We combine a discrete-element-method simulation with a stochastic process to model the movement of spherical particles in a turbulent channel flow. With this model we investigate the mixing properties of two species of particles flowing through the channel. We find a linear increase of the mixing zo...

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Bibliographic Details
Published in:Physical review. E, Statistical, nonlinear, and soft matter physics Statistical, nonlinear, and soft matter physics, 2011-06, Vol.83 (6 Pt 2), p.066301-066301, Article 066301
Main Authors: Burgener, Thomas, Kadau, Dirk, Herrmann, Hans J
Format: Article
Language:English
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Summary:We combine a discrete-element-method simulation with a stochastic process to model the movement of spherical particles in a turbulent channel flow. With this model we investigate the mixing properties of two species of particles flowing through the channel. We find a linear increase of the mixing zone with the length of the pipe. Flows at different Reynolds number are studied. Below a critical Reynolds number at the Taylor microscale of around Rc ≈ 300 the mixing rate is strongly dependent on the Reynolds number. Above Rc the mixing rate stays nearly constant.
ISSN:1539-3755
1550-2376
DOI:10.1103/PhysRevE.83.066301