An experimental study for impact of a drop onto a particle in mid-air: The influence of particle wettability. (October 2016)

• Record Type: Journal Article
• Authors: Sechenyh, Vitaliy; Amirfazli, Alidad
• Is Part Of: Journal of fluids and structures. Volume 66(2016:Oct.)
• Page Start: 282
• Page End: 292
• Publication Date: 2016-10
• Subjects: Liquid lamella -- Particle -- Drop impact -- Liquid ligaments; Fluid-structure interaction -- Periodicals; Fluid mechanics -- Periodicals; Structural dynamics -- Periodicals; Structural analysis (Engineering) -- Periodicals; 620.106
• DOI: 10.1016/j.jfluidstructs.2016.07.020
• Languages: English
• ISSNs: 0889-9746

Abstract

Abstract: Drop impact onto a particle in mid-air is a fundamental physical phenomena relevant to many applications involving a fluidized bed, for example, refining of heavy oil or coating of drug particles for pharmaceutical industry. A literature analysis shows that previous studies were focused on collisions of drops with static particles of either spherical or non-spherical shapes. This paper reports on experiments conducted at similar impact conditions with water drops and particles made of hydrophobic (polystyrene) and hydrophilic (soda-lime glass) materials. It was observed that at similar Weber numbers, wettability of the particle plays a key role in transition between collision outcomes with formation of a liquid lamella and ligaments. Present investigation is one of the first which reveals quantitative aspects for dynamics of the lamella and liquid ligaments in a particular case of mid-air collisions. Abstract : Graphical abstract: Abstract : Highlights: An influence of a particle wettability on a collision outcome was studied. A morphology of a lamella and liquid ligaments was analyzed quantitatively. A stability and dimensions of lamella and ligament depends on the Weber number.