Gravity-driven powder flow and the influence of external vibration on flow characteristics

作     者：Muhammad Shahid Ansari Ratna Kumar Annabattula Sathyan Subbiah Muhammad Shahid Ansari;Ratna Kumar Annabattula;Sathyan Subbiah

作者机构：Department of Mechanical EngineeringIndian Institute of Technology MadrasChennai 600036India 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2024年第88卷第5期

页      面：201-209页

核心收录：

学科分类：07[理学] 0701[理学-数学] 070101[理学-基础数学] 

基　　金：The authors are grateful to Dr. Rathna Prasad Sagi for the valuable guidance concerning the experimental procedures. We are thankful to Mr. S. Murali  junior technician at Machine Design Section  IIT Madras for assisting with the fabrication of the experimental set-up 

主　　题：Discrete element method Flow rate Granular flow Path tracking Vibration intensity 

摘      要：The controlled and homogeneous flow of dry granular powders through hoppers is essential for applications,namely,packaging of food grains,fertilizers and additive manufacturing processes such as directed energy deposition for better product *** of the major issues encountered in the granular flows through hoppers is flow stagnation due to the well-known arching ***-assisted granular flow through hoppers is one of the mechanisms used for better mass flow *** this work,the influence of external mechanical vibration on the powder flow is investigated experimentally and using discrete element ***,the mass flow rate through the hopper increases with an increase in vibration amplitude and then decreases,signifying the existence of an optimal amplitude of *** DEM simulations explained the underlying mechanisms for the existence of an optimal amplitude of vibration corresponding to the maximum mass flow rate.A range of vibration amplitudes from 0 mm to 3.5 mm is used to study the flow behaviour;the maximum flow of around 33 g/s to 35 g/s is observed for 0.75 mm to 1.25 mm vibration amplitude for the hopper-particle combination studied in this *** work also reports the influence of vibration frequency,hopper,and particle dimension on the flow *** research facilitates the effective use of mechanical vibration to enhance powder flow that can further be extended to non-spherical and multi-material particles.