Numerical study on the characteristics of single wetted flat wire with single droplet impact under the disturbance of airflow

A three-dimensional numerical study of a single droplet splashing vertically on a liquid film is presented. The numerical method is based on the finite volume method (FVM) of Navier–Stokes equations coupled with the volume of fluid (VOF) method, and the adaptive local mesh refinement technology is adopted. It enables the liquid–gas interface to be tracked more accurately, and to be less computationally expensive. The relationship between the diameter of the free rim, the height of the crown with different numbers of collision Weber, and the thickness of the liquid film is explored. The results indicate that the crown height increases as the Weber number increases, and the diameter of the crown rim is inversely proportional to the collision Weber number. It can also be concluded that the dimensionless height of the crown decreases with the increase in the thickness of the dimensionless liquid film, which has little effect on the diameter of the crown rim during its growth.

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Comparison of single droplet impact behaviors on the burning shallow/deep pool

European Journal of Mechanics - B/Fluids ◽

10.1016/j.euromechflu.2018.11.016 ◽

2019 ◽

Vol 74 ◽

pp. 191-199 ◽

Cited By ~ 5

Author(s):

Xujun Fan ◽

Changjian Wang ◽

Xing Wang ◽

Manhou Li ◽

Zhihe Shen

Keyword(s):

Droplet Impact ◽

Single Droplet

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Numerical Study of Droplet Impact on Solid Surfaces Using a Coupled Level Set and Volume-of-Fluid Method

Transactions of the Korean Society of Mechanical Engineers B ◽

10.3795/ksme-b.2003.27.6.744 ◽

2003 ◽

Vol 27 (6) ◽

pp. 744-752

Author(s):

Young-Ho Suh ◽

Gi-Hun Son

Keyword(s):

Level Set ◽

Numerical Study ◽

Volume Of Fluid ◽

Droplet Impact ◽

Solid Surfaces ◽

Volume Of Fluid Method

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Numerical Study on Deformation and Interior Flow of a Droplet Suspended in Viscous Liquid under Steady Electric Fields

Advances in Mechanical Engineering ◽

10.1155/2014/532797 ◽

2014 ◽

Vol 6 ◽

pp. 532797 ◽

Cited By ~ 5

Author(s):

Zhentao Wang ◽

Qingming Dong ◽

Yonghui Zhang ◽

Junfeng Wang ◽

Jianlong Wen

Keyword(s):

Electric Fields ◽

Numerical Study ◽

Internal Flow ◽

High Viscosity ◽

Numerical Results ◽

Experimental Results ◽

Fluid Viscosity ◽

Single Droplet ◽

Deformation Velocity ◽

Interior Flow

A model based on the volume of fluid (VOF) method and leaky dielectric theory is established to predict the deformation and internal flow of the droplet suspended in another vicious fluid under the influence of the electric field. Through coupling with hydrodynamics and electrostatics, the rate of deformation and internal flow of the single droplet are simulated and obtained under the different operating parameters. The calculated results show that the direction of deformation and internal flow depends on the physical properties of fluids. The numerical results are compared with Taylor's theory and experimental results by Torza et al. When the rate of deformation is small, the numerical results are consistent with theory and experimental results, and when the rate is large the numerical results are consistent with experimental results but are different from Taylor's theory. In addition, fluid viscosity hardly affects the deformation rate and mainly dominates the deformation velocity. For high viscosity droplet spends more time to attain the steady state. The conductivity ratio and permittivity ratio of two different liquids affect the direction of deformation. When fluid electric properties change, the charge distribution at the interface is various, which leads to the droplet different deformation shapes.

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