End wall effect on particle motion in a chute flow--颗粒学报PARTICUOLOGY

Wang, R., Li, R., Wang, S., Chen, Q., & Yang, H. (2021). End wall effect on particle motion in a chute flow. Particuology, 54, 102-108. https://doi.org/10.1016/j.partic.2020.03.002

End wall effect on particle motion in a chute flow

Ran Wang ^{a 1}, Ran Li ^{b a 1}, Shuaishuai Wang ^a, Quan Chen ^a, Hui Yang ^a *

a School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
b School of Medical Instrument and Food Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China

10.1016/j.partic.2020.03.002

Volume 54, February 2021, Pages 102-108

Received 14 January 2020, Revised 5 March 2020, Accepted 14 March 2020, Available online 25 May 2020, Version of Record 28 January 2021.

E-mail: yanghui@usst.edu.cn

Highlights

• Inertial technology is used to measure the motion of particles in a chute.

• The rotational motion of characteristic particles was measured and analyzed.

• The distributions of z-axis angular and translational velocity were analyzed.

• The end wall effect is related to the tilt angle in a chute.

Abstract

The influence of the end wall of a chute on the rotation of internal characteristic particles is mainly on the z-axis. A measurement device based on inertial measurement technology does not require the assistance of external information; hence, it is especially suitable for measuring the angular and translational velocities of internal characteristic particles. To study the influence of the end wall of the chute on the motions of the internal characteristic particles, the z-axis rotational and translational velocities of the internal characteristic particles in the chute were measured, and it was found that the rotational velocity about the z-axis differs according to the initial position. The z-axis angular velocity of a characteristic particle at the centre fluctuates near 0, and the average value approaches 0. The z-axis angular velocity of a characteristic particle at the left end wall is typically negative. This phenomenon is due to the influence of the end wall on the rotational motions of particles with initial positions that are near the end wall. In addition, the average translational velocity of the characteristic particles is also affected by the end wall. The distributions of the average z-axis angular velocity and the average translational velocity are quantitatively analysed, and the correlation between the tilt angle of the chute and the end wall effect is studied.

Graphical abstract

Keywords

Chute; Particle rotation; End wall

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