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Dilute suspensions in annular shear flow under gravity: simulation and experiment

Schröer, Kevin and Kurzeja, Patrick and Schulz, Stephan and Brockmann, Philipp and Hussong, Jeanette and Janas, Peter and Wlokas, Irenaeus and Kempf, Andreas and Wolf, Dietrich E. (2017):
Dilute suspensions in annular shear flow under gravity: simulation and experiment. (Publisher's Version)
In: EPJ Web of Conferences, 140, pp. 1-4. EDP Sciences, ISSN 2100-014X,
DOI: 10.25534/tuprints-00014266,
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Item Type: Article
Origin: Secondary publication via Golden Open Access
Status: Publisher's Version
Title: Dilute suspensions in annular shear flow under gravity: simulation and experiment
Language: English
Abstract:

A dilute suspension in annular shear flow under gravity was simulated using multi-particle collision dynamics (MPC) and compared to experimental data. The focus of the analysis is the local particle velocity and density distribution under the influence of the rotational and gravitational forces. The results are further supported by a deterministic approximation of a single-particle trajectory and OpenFOAM CFD estimations of the overcritical frequency range. Good qualitative agreement is observed for single-particle trajectories between the statistical mean of MPC simulations and the deterministic approximation. Wall contact and detachment however occur earlier in the MPC simulation, which can be explained by the inherent thermal noise of the method. The multi-particle system is investigated at the point of highest particle accumulation that is found at 2/3 of the particle revolution, starting from the top of the annular gap. The combination of shear flow and a slowly rotating volumetric force leads to strong local accumulation in this section that increases the particle volume fraction from overall 0.7% to 4.7% at the outer boundary. MPC simulations and experimental observations agree well in terms of particle distribution and a close to linear velocity profile in radial direction.

Journal or Publication Title: EPJ Web of Conferences
Journal volume: 140
Publisher: EDP Sciences
Classification DDC: 600 Technik, Medizin, angewandte Wissenschaften > 600 Technik
600 Technik, Medizin, angewandte Wissenschaften > 620 Ingenieurwissenschaften
Divisions: 16 Department of Mechanical Engineering > Fluid Mechanics and Aerodynamics (SLA)
Date Deposited: 30 Nov 2020 15:39
Last Modified: 02 Dec 2020 07:51
DOI: 10.25534/tuprints-00014266
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-142666
Additional Information:

Powders and Grains 2017 - 8th International Conference on Micromechanics on Granular Media

URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/14266
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