Droplet impact dynamics on a spherical particle

Abstract

Experiments and computational fluid dynamics (CFD) simulations of droplet impact on a spherical particle were carried out. Droplet spread was measured at different Weber numbers and surface temperatures. It was found that droplet spread is better predicted by dynamic contact angle than static contact angle. Heat transfer coefficients during impact were found to reduce towards the film boiling regime. Vapour regions around evaporating droplets were captured using Schlieren imaging. The results provide fundamental understanding of the interplay between hydrodynamic spreading, contact angle dynamics, and phase-change heat transfer relevant to fluid catalytic cracking and spray-drying processes.

@article{mitra2013ces,
  title         = {Droplet impact dynamics on a spherical particle},
  author        = {Mitra, Subhasish and Sathe, Mayur J. and Doroodchi, Elham and Utikar,
                  Ranjeet and Shah, Milin K. and Pareek, Vishnu and Joshi, Jyeshtharaj B.
                  and Evans, Geoffrey M.},
  year          = 2013,
  journal       = {Chemical Engineering Science},
  publisher     = {Elsevier},
  volume        = 100,
  pages         = {105--119},
  doi           = {10.1016/j.ces.2013.01.037},
  url           = {https://www.sciencedirect.com/science/article/pii/S000925091300050X}
}