Investigations on the process of droplet impact on an orifice plate

Li, Daming; Wang, Zhichao; Lin, Bai Quan; Xiao, Wang

doi:10.7498/aps.62.194704

Cited by 3 publications

References 20 publications

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Numerical simulation for fluid droplet impact on discrete particles with coupled SPH-DEM method

Bie

et al. 2018

HFF

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Purpose A new coupled model is developed to simulate the interaction between fluid droplet collisions on discrete particles (DPs) by using mathematic function. Design/methodology/approach In this model, the smoothed particle hydrodynamics (SPH) is used based on the kernel function and the time step which takes into consideration to the fluid domain in accordance with the discrete element method (DEM) with resistance function. The interaction between fluid and DPs consists of three parts, which are repulsive force, viscous shear force and attractive force caused by the capillary action. The numerical simulation of droplet collision on DPs presents the whole process of droplet motion. Otherwise, an experimental data were conducted to record the realistic process for verification. Findings The comparison result indicated that the numerical simulation is capable of capturing the entire process for droplet collision on DPs. Research limitations/implications However, based on the difference of experimental environment, type of the DP and setups, the maximum spreading dimeters of could not fit the experimental data exactly. Originality/value In sum, the coupled SPH-DEM method simulation shows that the coupled model of SPH-DEM developed an entire effectiveness process for fluid–solid interaction problem.

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Numerical simulation for fluid droplet impact on discrete particles with coupled SPH-DEM method

Bie

et al. 2018

HFF

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Application of SPH on Numerical Simulation of Two-Dimensional Steady and Unsteady Flow

Liu¹,

Wei²

2015

Proceedings of the 2015 International Conference on Industrial Technology and Management Science

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Study on the droplet impact on hydrophobic surface in terms of van der Waals surface tension model

Liu¹,

Li²,

Li³

et al. 2015

Acta Phys. Sin.

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Research on the droplet impact on a hydrophobic surface is of important theoretical significance and engineering value, both in mesoscopic fluid mechanics and interactions between microfluid and special materials. The van der Waals (vdW) equation of state relates the pressure to the temperature and the density of the fluid, and gives the long-range attractive force and short-range repulsive force between particles. The van der Waals equation of state can be used to describe the surface tension between liquid and vapor. As a pure meshless particle method, the smoothed particle hydrodynamic (SPH) method can use the vdW equation of state written in SPH form of N-S equations to describe the surface tension. The vdW surface tension mode is validated by simulating the coalescence of two equally sized static droplets in vacuum. Repellant of the hydrophobic surface is derived from a core potential. By combining the vdW surface tension and the repulsive force of the surface, the phenomenon of a liquid droplet impact with a certain initial velocity on the hydrophobic surface is studied. The SPH model is not only capable to describe the spreading of the droplet after it contacts the surface, but also clearly reproduces the springback, bouncing and secondary impact of the droplet. During the deformation of the droplet, the inertia force impels the spreading process of the droplet whilst the springback and bouncing behavior is dominated by the surface tension. The simulated results are in good agreement with the published experimental observations and VOF simulated results, indicating that the way we treat the surface tension and the repulsive force of the hydrophobic surface is effective and applicable in droplet impact surface problems. The impact velocity and liquid viscosity are considered to be two important factors that affect the deformation of the droplet after it contacts the surface. By varying the impact velocity within a certain range it is concluded that the maximum liquid-solid contact area increases as the impact velocity grows, and the bounced droplet will leave the surface when the velocity is big enough. Another comparison between different liquid viscosities shows that the maximum contact area decreases as the liquid viscosity increases because of the viscous dissipation, and the droplet barely rebound when the liquid viscosity is big enough.

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Investigations on the process of droplet impact on an orifice plate

Cited by 3 publications

References 20 publications

Numerical simulation for fluid droplet impact on discrete particles with coupled SPH-DEM method

Numerical simulation for fluid droplet impact on discrete particles with coupled SPH-DEM method

Application of SPH on Numerical Simulation of Two-Dimensional Steady and Unsteady Flow

Study on the droplet impact on hydrophobic surface in terms of van der Waals surface tension model

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