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

Journal Article (Journal Article)

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.

Full Text

Duke Authors

Cited Authors

  • Müller, T; Huang, K

Published Date

  • April 15, 2016

Published In

Volume / Issue

  • 93 /

Start / End Page

  • 042904 -

PubMed ID

  • 27176377

Electronic International Standard Serial Number (EISSN)

  • 2470-0053

International Standard Serial Number (ISSN)

  • 2470-0045

Digital Object Identifier (DOI)

  • 10.1103/physreve.93.042904


  • eng