Eur. Phys. J. Plus (2018) 133: 306
https://doi.org/10.1140/epjp/i2018-12135-6

Regular Article

Simulating phase change during the droplet deformation and impact on a wet surface in a square microchannel: An application of oil drops collision

¹ Department of Mechanical Engineering & Energy Processes, Southern Illinois University, 62901, Carbondale, IL, USA
² Department of Mechanical Engineering, Semnan Branch, Islamic Azad University, Semnan, Iran
³ Department of Mechanical Engineering, Ferdowsi University of Mashhad, 91775-1111, Mashhad, Iran
⁴ Department of Mathematics & Statistics, FBAS, IIUI, 44000, Islamabad, Pakistan

^* e-mail: rahmatellahi@yahoo.com

Received: 29 May 2018
Accepted: 27 June 2018
Published online: 3 August 2018

Abstract

This paper is an attempt to simulate the mathematical modelling on drop deformation in a saturated medium due to its movement and collision onto the liquid film. The reactions between fluid-fluid interaction and wall are completely simulated. Computations are performed for a two-dimensional domain under the influence of a saturation situation (that is saturation vapor and liquid co-exist) by the lattice Boltzmann method. The effects of different parameters, such as Weber number, collision angle on the drop deformation and its collision onto the liquid film, radius and initial position of the droplet are investigated. A stronger wave forms in the liquid film after collision of the drop for the case of inclined collision in comparison with the normal one. Additionally, a 5.5% increment in the maximum height of the created wave for Lu and normal collision when the initial position of the drop moves from H = 0.5 L to H = 0.25 L is found.