Novel approach for measurement of restitution coefficient by magnetic particle tracking

Inter particular contacts between particles are of great interest, as the intensity and quantity of contacts impact the behavior of a wide variety of industrial processes. The coefficient of restitution is commonly used to describe the collision of a particle either with other particles or with walls and components of plant equipment. The coefficient considers the amount of energy that is dissipated in the collision event. Usually the restitution coefficient is examined by the use of high speed cameras and image velocimetry. In this study a new method based on magnetic particle tracking (MPT) was developed to measure the restitution coefficient of magnetic particles. By performing simultaneous image velocimetry and MPT measurements, the novel approach is validated. The comparison shows a high coincidence of the results from both measurement methods, both for normal direction impacts as well as impacts on oblique surfaces. Furthermore, the rotation of particles was investigated (by rolling down a tilted plate), which has also shown the applicability of the MPT measurement method.

Subjects

Image velocimetry

Magnetic particle tracking

Restitution coefficient

Rotational velocity

DDC Class

530: Physik

600: Technik

620: Ingenieurwissenschaften

Funding(s)

Analyse der Fluidisations- und Scherbedingungen in Rotor-Wirbelschichten im trockenen und feuchten Zustand

Funding Organisations

Deutsche Forschungsgemeinschaft (DFG)

More Funding Information

The authors acknowledge funding of this work by the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) with the Project-ID HE 4526/25–1.

Lizenz

https://creativecommons.org/licenses/by-nc-nd/4.0/

Name

1-s2.0-S0921883121005410-main.pdf

Size

1.72 MB

Format

Adobe PDF

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Novel approach for measurement of restitution coefficient by magnetic particle tracking