Modification of the spherical particle spring-damping contact model from contact velocity dependent restitution coefficients
Journal
Powder Technology
Journal Volume
401
Date Issued
2022
Author(s)
Abstract
The most common granular flow Discrete Element Method (DEM) simulation contact model is the spring-damping model, which typically uses constant restitution coefficients to estimate the model damping coefficient. The predicted rebound velocities are thus pre-determined by the ad hoc restitution coefficient setting. Considering the fact that the coefficient of restitution is contact velocity-dependent and event driven, we advance the spring-damping model using three contact velocity-dependent restitution coefficient approaches. We show that the spring-damping model using a new restitution coefficient approach derived from the model of Walton & Braun (1986) gives good rebound velocity predictions over a range of contact velocities for four spherical particles of different hardness. © 2022 Elsevier B.V.
Subjects
Contact duration; Contact force; DEM; Restitution coefficient; Spring-damping model
Other Subjects
Damping; End effectors; Granular materials; Velocity; Contact duration; Contact forces; Contact modeling; Contact velocity; Discrete elements method; Rebound velocity; Restitution coefficient; Spherical particle; Spring-damping models; Velocity-dependent; Finite difference method; article; discrete element analysis; hardness; prediction; rebound; spring; velocity
Type
journal article