PENG Deqi1, ZHANG Kaibo1, ZHENG Wei1, WU Shuying1,YU Tianlan2, CHEN Lanwei1, ZHANG Jianping1
(1. College of Mechanical Engineering, Xiangtan University, Xiangtan 411105, China; 2. College of Mechanical Engineering, Hunan University of Technology, Zhuzhou 412000, China)
Abstract: In order to investigate the law of particle sedimentation in the tube and the reliability of the direct numerical simulation calculation method, an experimental platform for particle free sedimentation in a vertical tube was set up for comparative research.The digital image captured by the high-speed camera was processed by MATLAB software to obtain the position trajectory map and position coordinates of the particle sedimentation process. At the same time, the direct cloud simulation method was used to obtain the velocity cloud map and position distribution map of the particle sedimentation process. The results show that the particle sedimentation movement has experienced a process of acceleration to gradual stability, the trajectory of the movement is in a spiral downward law, and the distribution of the radial position has periodic oscillation. The simulation results can match well with the experimental results, the feasibility and reliability of the experiment and direct numerical simulation method are verified.
Keywords: particle sedimentation；motion behavior；periodicity；high speed camera；direct numerical simulation
文章编号：1008-5548(2020)06-0031-06
DOI:10.13732/j.issn.1008-5548.2020.06.004
收稿日期： 2020-03-16， 修回日期：2020-05-25，在线出版时间：2020-09-11 10:05。
基金项目：湖南省自然科学基金项目，编号：2018JJ4054。
第一作者简介：彭德其(1972—)，男，博士，教授，硕士生导师，研究方向为过程强化与节能环保。E-mail：pengshuaike@163.com。
中图分类号：O359 文献标志码：A
