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End wall effect on particle motion in a chute flow
Particuology ( IF 3.5 ) Pub Date : 2020-05-25 , DOI: 10.1016/j.partic.2020.03.002
Ran Wang , Ran Li , Shuaishuai Wang , Quan Chen , Hui Yang

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.



中文翻译:

端壁对斜道流中粒子运动的影响

溜槽端壁对内部特征粒子旋转的影响主要在z轴上。基于惯性测量技术的测量设备不需要外部信息的帮助;因此,它特别适用于测量内部特征粒子的角速度和平移速度。为了研究斜槽端壁对内部特征颗粒运动的影响,测量了内部特征颗粒在斜槽中的z轴旋转和平移速度,发现绕z的旋转速度轴根据初始位置而有所不同。该ž中心的特征粒子的z轴角速度在0附近波动,且平均值接近0。左端壁处的特征粒子的z轴角速度通常为负。此现象是由于端壁对初始位置靠近端壁的粒子的旋转运动的影响所致。另外,特征颗粒的平均平移速度也受到端壁的影响。定量分析了平均z轴角速度和平均平移速度的分布,研究了溜槽的倾斜角与端壁效应的相关性。

更新日期:2020-05-25
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