title: Development of an Experimental Setup for the Measurement of the Coefficient of Restitution under Vacuum Conditions.
abstract: The Discrete Element Method is used for the simulation of particulate systems to describe and analyze them, to predict and afterwards optimize their behavior for single stages of a process or even an entire process. For the simulation with occurring particle-particle and particle-wall contacts, the value of the coefficient of restitution is required. It can be determined experimentally. The coefficient of restitution depends on several parameters like the impact velocity. Especially for fine particles the impact velocity depends on the air pressure and under atmospheric pressure high impact velocities cannot be reached. For this, a new experimental setup for free-fall tests under vacuum conditions is developed. The coefficient of restitution is determined with the impact and rebound velocity which are detected by a high-speed camera. To not hinder the view, the vacuum chamber is made of glass. Also a new release mechanism to drop one single particle under vacuum conditions is constructed. Due to that, all properties of the particle can be characterized beforehand.
authors.affiliation: Industrial Process Engineering, University of Technology of Compiègne; sven.druecker@tuhh.de.
authors.forename: Sven
authors.initials: S
authors.lastname: Drücker
authors.affiliation: Institute for Particle Technology, Technische Universität Braunschweig.
authors.forename: Isabell
authors.initials: I
authors.lastname: Krautstrunk
authors.affiliation: Institute for Particle Technology, Technische Universität Braunschweig.
authors.forename: Maria
authors.initials: M
authors.lastname: Paulick
authors.affiliation: Industrial Process Engineering, University of Technology of Compiègne.
authors.forename: Khashayar
authors.initials: K
authors.lastname: Saleh
authors.affiliation: Industrial Process Engineering, University of Technology of Compiègne.
authors.forename: Martin
authors.initials: M
authors.lastname: Morgeneyer
authors.affiliation: Institute for Particle Technology, Technische Universität Braunschweig.
authors.forename: Arno
authors.initials: A
authors.lastname: Kwade
mesh_terms: D011208:Powders / Q000032:analysis*; D014618:Vacuum
chemical_list: D011208:Powders