Table of Contents Author Guidelines Submit a Manuscript
Modelling and Simulation in Engineering
Volume 2012, Article ID 687961, 10 pages
http://dx.doi.org/10.1155/2012/687961
Research Article

Numerical Simulations of the Impact and Spreading of a Particulate Drop on a Solid Substrate

1School of Mechanical Engineering, Research Center for Aircraft Parts Technology (ReCAPT), Gyeongsang National University, Gajwa-dong 900, Jinju 660-701, Republic of Korea
2Department of Chemical and Biological Engineering and Applied Rheology Center, Korea University, Seoul 136-713, Republic of Korea

Received 27 April 2012; Revised 27 September 2012; Accepted 27 September 2012

Academic Editor: Jing-song Hong

Copyright © 2012 Hyun Jun Jeong et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

We present two-dimensional numerical simulations of the impact and spreading of a droplet containing a number of small particles on a flat solid surface, just after hitting the solid surface, to understand particle effects on spreading dynamics of a particle-laden droplet for the application to the industrial inkjet printing process. The Navier-Stokes equation is solved by a finite-element-based computational scheme that employs the level-set method for the accurate interface description between the drop fluid and air and a fictitious domain method for suspended particles to account for full hydrodynamic interaction. Focusing on the particle effect on droplet spreading and recoil behaviors, we report that suspended particles suppress the droplet oscillation and deformation, by investigating the drop deformations for various Reynolds numbers. This suppressed oscillatory behavior of the particulate droplet has been interpreted with the enhanced energy dissipation due to the presence of particles.