A novel approach to determine wet restitution coefficients through a unified correlation and energy analysis

Journal article (2015)

Authors

Vinayak S. Sutkar Eindhoven University of Technology
Niels G. Deen Eindhoven University of Technology
J.T. Padding Eindhoven University of Technology
J. A.M. Hans Kuipers Eindhoven University of Technology
Vitalij Salikov Hamburg University of Technology
Britta Crüger Hamburg University of Technology
Sergiy Antonyuk Hamburg University of Technology
Stefan Heinrich Hamburg University of Technology
Affiliation
External organisation
Correlation and energy approach Fluidized bed granulator Wet particle interaction Wet restitution coefficient
More Info
expand_more

Published Date

2015

Language

English

Reuse Rights

Other than for strictly personal use, it is not permitted to download, forward or distribute the text or part of it, without the consent of the author(s) and/or copyright holder(s), unless the work is under an open content license such as Creative Commons.

Affiliation

External organisation

Abstract

Wet particle interactions are observed in many applications, for example, pharmaceutical, food, agricultural, polymerization, agglomeration, and coating, in which an accurate evaluation of the wet restitution coefficient (ewet) is crucial to understand the particle flowability, operating conditions and product size distribution. Experiments were performed to measure the wet restitution coefficient by impacting a spherical particle on a stationary plate covered with a thin liquid layer of water or glycerol solution in this work. Furthermore, novel approaches for estimation of ewet were developed using dimensional analysis (using the Buckingham π theorem and regression analysis) in combination with energy budget analysis. In the correlation development, the dominant physical properties of solid and liquid, particle impact velocity and liquid layer thickness are grouped into well-known dimensionless numbers viz. Reynolds, Weber and Stokes. Whereas in the energy analysis, the energy dissipation rates were determined for five distinct collision phases, that is, dipping, dry collision, undipping, formation and breakage of the liquid bridge, and added mass. The efficacy of the developed approaches was analyzed by comparing obtained results with experiments and an elastohydrodynamic model, and a modified elastohydrodynamic model.