Influences of Liquid Viscosity and Relative Velocity on the Head-On Collisions of Immiscible Drops

Many researchers have devoted themselves to the collision processes of binary droplets of the same liquid. However, the liquids used in their study were limited, and the phase diagram of the collision outcome was depicted in terms of the Weber and the non-dimensional impact parameter. In this resear...

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Bibliographic Details
Published in:Energies (Basel) 2022-11, Vol.15 (22), p.8544
Main Authors: Chang, Jiaqing, Xu, Rongchang, Cui, Jinsheng, Song, Qiaolin, Shen, Teng
Format: Article
Language:English
Subjects:
Boundary conditions
Collisions (Physics)
Deformations (Mechanics)
droplet collision
droplet deformation
Droplets
encapsulation
Fluid flow
immiscible drops
Impact velocity
Influence
Interfaces
Liquids
Miscibility
Phase diagrams
Properties
Simulation
Velocity
Viscosity
Weber number
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Summary:Many researchers have devoted themselves to the collision processes of binary droplets of the same liquid. However, the liquids used in their study were limited, and the phase diagram of the collision outcome was depicted in terms of the Weber and the non-dimensional impact parameter. In this research, the variety of liquid was broadened, and the phase diagram characterized by the Weber number and the Ohnesorge number for head-on collisions of immiscible drops was provided. First, a ternary flow model of binary collision of immiscible drops in quiescent ambient air was proposed. Second, the three-phase fluid interface was tracked and updated by iterating the VOF (Volume of Fluid) functions. The flow field was also updated with the PISO (Pressure-Implicit with Splitting of Operators) algorithm. Finally, the effects of the impact velocity and the viscosities of the liquids on the deformation degree of droplets were analyzed.
ISSN:1996-1073
1996-1073
DOI:10.3390/en15228544