中国物理B ›› 2022, Vol. 31 ›› Issue (11): 114501-114501.doi: 10.1088/1674-1056/ac7dc0

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Rolling velocity and relative motion of particle detector in local granular flow

Ran Li(李然)1,†, Bao-Lin Liu(刘宝林)1, Gang Zheng(郑刚)1, and Hui Yang(杨晖)2,‡   

  1. 1 School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2 School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • 收稿日期:2022-05-09 修回日期:2022-06-27 接受日期:2022-07-02 出版日期:2022-10-17 发布日期:2022-11-01
  • 通讯作者: Ran Li, Hui Yang E-mail:ran89@usst.edu.cn;Yanghui@usst.edu.cn
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11972212, 12072200, and 12002213).

Rolling velocity and relative motion of particle detector in local granular flow

Ran Li(李然)1,†, Bao-Lin Liu(刘宝林)1, Gang Zheng(郑刚)1, and Hui Yang(杨晖)2,‡   

  1. 1 School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;
    2 School of Optical-Electrical and Computer Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
  • Received:2022-05-09 Revised:2022-06-27 Accepted:2022-07-02 Online:2022-10-17 Published:2022-11-01
  • Contact: Ran Li, Hui Yang E-mail:ran89@usst.edu.cn;Yanghui@usst.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11972212, 12072200, and 12002213).

摘要: The velocity of a particle detector in granular flow can be regarded as the combination of rolling and sliding velocities. The study of the contribution of rolling velocity and sliding velocity provides a new explanation to the relative motion between the detector and the local granular flow. In this study, a spherical detector using embedded inertial navigation technology is placed in the chute granular flow to study the movement of the detector relative to the granular flow. It is shown by particle image velocimetry (PIV) that the velocity of chute granular flow conforms to Silbert's formula. And the velocity of the detector is greater than that of the granular flow around it. By decomposing the velocity into sliding and rolling velocity, it is indicated that the movement of the detector relative to the granular flow is mainly caused by rolling. The rolling detail shown by DEM simulation leads to two potential mechanisms based on the position and drive of the detector.

关键词: local velocity distribution, rolling velocity, inertial navigation technology, relative velocity dependent (RVD) rolling friction

Abstract: The velocity of a particle detector in granular flow can be regarded as the combination of rolling and sliding velocities. The study of the contribution of rolling velocity and sliding velocity provides a new explanation to the relative motion between the detector and the local granular flow. In this study, a spherical detector using embedded inertial navigation technology is placed in the chute granular flow to study the movement of the detector relative to the granular flow. It is shown by particle image velocimetry (PIV) that the velocity of chute granular flow conforms to Silbert's formula. And the velocity of the detector is greater than that of the granular flow around it. By decomposing the velocity into sliding and rolling velocity, it is indicated that the movement of the detector relative to the granular flow is mainly caused by rolling. The rolling detail shown by DEM simulation leads to two potential mechanisms based on the position and drive of the detector.

Key words: local velocity distribution, rolling velocity, inertial navigation technology, relative velocity dependent (RVD) rolling friction

中图分类号:  (Granular systems)

  • 45.70.-n
45.70.Ht (Avalanches) 45.50.-j (Dynamics and kinematics of a particle and a system of particles)