Influence of the number of flights on the dilute phase ratio in flighted rotating drums by PTV measurements and DEM simulations--颗粒学报PARTICUOLOGY

Zhang, L., Jiang, Z., Mellmann, J., Weigler, F., Herz, F., Bück, A., & Tsotsas, E. (2021). Influence of the number of flights on the dilute phase ratio in flighted rotating drums by PTV measurements and DEM simulations. Particuology, 56, 171-182. https://doi.org/10.1016/j.partic.2020.09.010

Influence of the number of flights on the dilute phase ratio in flighted rotating drums by PTV measurements and DEM simulations

Lanyue Zhang ^{a b *}, Zhaochen Jiang ^{b c}, Jochen Mellmann ^a, Fabian Weigler ^d, Fabian Herz ^d, Andreas Bück^c, Evangelos Tsotsas ^b

a Department of Postharvest Technology, Leibniz Institute for Agricultural Engineering and Bioeconomy, Max-Eyth-Allee 100, Potsdam 14469, Germany
b Thermal Process Engineering, Otto von Guericke University Magdeburg, Universitaetsplatz 2, 39106 Magdeburg, Germany
c Institute of Particle Technology (LFG), FAU Erlangen-Nuremberg, Cauerstr. 4, 91058 Erlangen, Germany
d Department of Applied Biosciences and Process Engineering, Anhalt University of Applied Sciences, BernburgerStr. 55, 06366 Koethen, Germany

10.1016/j.partic.2020.09.010

Volume 56, June 2021, Pages 171-182

Received 31 December 2019, Revised 9 July 2020, Accepted 17 September 2020, Available online 7 November 2020, Version of Record 8 March 2021.

E-mail: lanyue.zhang@ovgu.de

Highlights

• The influence of the number of flights on the particle motion in FRD is studied.

• The Particle ratio of the dilute phase in FRD is investigated by PTV method.

• PTV data are compared with the predictions of previous models and DEM simulations.

• DEM simulations show a better performance than the previous literature models.

Abstract

Particle distribution in the cross-section of the flighted rotating drum (FRD) is critical to the analysis of heat and mass transfer between gas and solids. In this work, the particle tracking velocimetry (PTV) method is applied to study the influence of the number of flights on the particle motion in FRDs. The drum, installed with 1, 4, 8, or 12 rectangular flights, is filled with plastic balls to 15% and operated at various rotating speeds ranging from 10 rpm to 30 rpm. The results show that the number of flights has different effects on the holdup ratio and cascading rate of single flight and active flights. With 8 and 12 flights, the FRD produces a larger and more stable particle ratio of the dilute phase. Moreover, DEM simulations agree with PTV measurements, whereas literature models show significant deviations.

Graphical abstract

Keywords

Flighted rotating drum; Number of flights; Dilute phase; PTV; DEM

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