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Experiments and discrete element simulation of the dosing of cohesive powders in a simplified geometry

Imole, OI, Krijgsman, D, Weinhart, T, Magnanimo, V, Montes, BEC, Ramaioli, M and Luding, S (2016) Experiments and discrete element simulation of the dosing of cohesive powders in a simplified geometry Powder Technology, 287. pp. 108-120.

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Abstract

We perform experiments and discrete element simulations on the dosing of cohesive granular materials in a simplified geometry. The setup is a simplified canister box where the powder is dosed out of the box through the action of a constant-pitch screw feeder connected to a motor. A dose consists of a rotation step followed by a period of rest before the next dosage. From the experiments, we report on the operational performance of the dosing process through a variation of dosage time, coil pitch and initial powder mass. We find that the dosed mass shows an increasing linear dependence on the dosage time and rotation speed. In contrast, the mass output from the canister is not directly proportional to an increase/decrease in the number coils. By calibrating the interparticle friction and cohesion, we show that DEM simulation can quantitatively reproduce the experimental findings for smaller masses but also overestimate arching and blockage. With appropriate homogenization tools, further insights into microstructure and macroscopic fields can be obtained. This work shows that particle scaling and the adaptation of particle properties is a viable approach to overcome the untreatable number of particles inherent in experiments with fine, cohesive powders and opens the gateway to simulating their flow in more complex geometries.

Item Type: Article
Divisions : Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :
AuthorsEmailORCID
Imole, OIUNSPECIFIEDUNSPECIFIED
Krijgsman, DUNSPECIFIEDUNSPECIFIED
Weinhart, TUNSPECIFIEDUNSPECIFIED
Magnanimo, VUNSPECIFIEDUNSPECIFIED
Montes, BECUNSPECIFIEDUNSPECIFIED
Ramaioli, MUNSPECIFIEDUNSPECIFIED
Luding, SUNSPECIFIEDUNSPECIFIED
Date : 1 January 2016
Identification Number : 10.1016/j.powtec.2015.07.051
Copyright Disclaimer : © <2015>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords : Science & Technology, Technology, Engineering, Chemical, Engineering, Cohesion, Dosing, Particle scaling, Screw, Calibration, DEM, GRANULAR-MATERIALS, STRESS CALCULATIONS, SCREW CONVEYORS, CONTACT MODELS, PARTICLE-SHAPE, WALL FRICTION, ASSEMBLIES, SHEAR, FLOW
Related URLs :
Additional Information : © <2015>. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Depositing User : Symplectic Elements
Date Deposited : 01 Mar 2016 14:56
Last Modified : 22 Sep 2016 01:08
URI: http://epubs.surrey.ac.uk/id/eprint/809925

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