loading page

Rebound dynamics of two droplets simultaneously impacting a flat superhydrophobic surface
  • +3
  • Xin Wang,
  • Dian-Ji Lin,
  • Yi-Bo Wang,
  • Shu-Rong Gao,
  • Yan-Ru Yang,
  • Xiao-Dong Wang
Xin Wang
North China Electric Power University
Author Profile
Dian-Ji Lin
North China Electric Power University
Author Profile
Yi-Bo Wang
North China Electric Power University
Author Profile
Shu-Rong Gao
North China Electric Power University
Author Profile
Yan-Ru Yang
North China Electric Power University
Author Profile
Xiao-Dong Wang
North China Electric Power University
Author Profile

Abstract

In this letter, we investigate the rebound dynamics of two equally sized droplets simultaneously impacting a superhydrophobic surface via lattice Boltzmann method (LBM) simulations. We discover three rebound regimes depending on the droplet distance: a complete-coalescence-rebound (CCR) regime, a partial-coalescence-rebound (PCR) regime, and a no-coalescence-rebound (NCR) regime. We demonstrate that the rebound regime is closely associated with dynamic behaviors of the formed liquid ridge or bridge between two droplets. We also present the contact time in the three regimes. Intriguingly, although partial coalescence takes places, the contact time is still dramatically shortened in the PCR regime, which is even smaller than that of a single droplet impact. These findings provide new insights into the contact time of multiple droplets impact, and thereby offering useful guidance for some application such as anti-icing, self-cleaning, and so forth.

Peer review status:ACCEPTED

26 Jan 2020Submitted to AIChE Journal
30 Jan 2020Submission Checks Completed
30 Jan 2020Assigned to Editor
16 Feb 2020Reviewer(s) Assigned
07 Apr 2020Editorial Decision: Revise Major
21 May 20201st Revision Received
23 May 2020Submission Checks Completed
23 May 2020Assigned to Editor
29 May 2020Reviewer(s) Assigned
02 Jul 2020Editorial Decision: Accept