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http://dx.doi.org/10.14775/ksmpe.2018.17.3.022

Discrete Element Method using the Superposed Rigid-Rod Model for the Dynamic Behavior of Needle-Shaped Powder with a High Aspect Ratio  

Kim, YoungHo (Remelt Eng. Team, Ulsan Aluminium Limit.)
Park, Junyoung (Dept. Mech. Dsgn. Eng., Kumoh Nat. Inst. Tech.)
Publication Information
Journal of the Korean Society of Manufacturing Process Engineers / v.17, no.3, 2018 , pp. 22-27 More about this Journal
Abstract
One problem of the Discrete Element Method is the assumption of a spherical particle shape, which reduces the computing time but significantly limits the application of the DEM to analysis. This limitation can be overcome by a recently developed rigid-rod model. However, the rigid-rod model has an essential problem related with friction: it always contains friction error because of the bumpy surface. To overcome this issue, we suggest a superposed rigid-rod model in this paper. The superposed rigid-rod model is notably consistent with the theoretical value in terms of the velocity and angular velocity after the collision. The estimated error is negligible(less than 2%). Then, the developed model is applied to hopper discharging. The developed model shows no problem in the discharging flow from the hopper.
Keywords
Powder; Needle-Shaped Particle; Discrete Element Method;
Citations & Related Records
Times Cited By KSCI : 5  (Citation Analysis)
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