Influence of the liquid film thickness on the coefficient of restitution for wet particles

URN to cite this document: urn:nbn:de:bvb:703-epub-3929-6

Title data

Müller, Thomas ; Huang, Kai:
Influence of the liquid film thickness on the coefficient of restitution for wet particles.
In: Physical Review E. Vol. 93 (2016) . - Art.Nr. 042904.
ISSN 1550-2376
DOI der Verlagsversion: https://doi.org/10.1103/PhysRevE.93.042904

Format: PDF Name: PhysRevE.93.042904.pdf Version: Published Version Available under License German copyright law. This contribution is freely accessible with the consent of the copyright holder on the basis of an (DFG-funded) alliance or national license. The document may be used free of charge for personal use. In addition, the reproduction, editing, distribution and any kind of exploitation require the written consent of the respective rights holder.

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Abstract

The normal coefficient of restitution (COR) for a spherical particle bouncing on a wet plane is investigated experimentally and compared with a model characterizing the energy loss at impact. For fixed ratios of liquid film thickness δ to particle diameter D, the wet COR is always found to decay linearly with St−1, where St, the Stokes number, measures the particle inertia with respect to the viscous force of the liquid. Such a dependence suggests a convenient way of predicting the wet COR with two fit parameters: a critical COR at infinitely large St and a critical St at zero COR. We characterize the dependence of the two parameters on δ/D and compare it with a model considering the energy loss from the inertia and the viscosity of the wetting liquid. This investigation suggests an analytical prediction of the COR for wet particles.

Further data

Item Type:	Article in a journal
Keywords:	Fluid-particle interactions; granular fluids; granular materials; thin fluid films; wet granular materials
DDC Subjects:	500 Science > 530 Physics
Institutions of the University:	Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors > Chair Experimental Physics V - Univ.-Prof. Dr. Ingo Rehberg Profile Fields > Advanced Fields > Nonlinear Dynamics Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics V Profile Fields Profile Fields > Advanced Fields Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Former Professors
Language:	English
Originates at UBT:	Yes
URN:	urn:nbn:de:bvb:703-epub-3929-6
Date Deposited:	07 Dec 2018 12:13
Last Modified:	30 Jun 2020 10:38
URI:	https://epub.uni-bayreuth.de/id/eprint/3929

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