Abstract
In this study, a truly incompressible smoothed particle hydrodynamics (SPH) algorithm combined with an effective surface tension model is extended to simulate the dynamic process of multiple droplets impacting on a liquid film in 2D and 3D. This approach uses a pressure Poisson equation to satisfy the incompressibility constraints, and the Navier–Stokes equations are solved in a Lagrangian form using a fractional-step projection method. The mathematical model is first validated by the simulations of several fluid impact phenomena in comparison with those obtained by other numerical methods. Then the interesting phenomena of two 2D droplets impacting successively on a rigid solid/liquid film are numerically predicted and compared with the corresponding experimental results. Next, the fluid mechanics of two 2D droplets impinging simultaneously on a thin liquid film are numerically investigated. The effects of the impact velocity and the two droplets’ horizontal spacing on the collision behavior are discussed in detail. Lastly, the splashing phenomenon of a 3D droplet impacting on a thin liquid film is simulated. All numerical results obtained are in agreement with the available data.
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Acknowledgments
The support of the National Basic Research Program of China (No. 2012CB025903) and that of the National Natural Science Foundation of China (No. 10871159) are fully acknowledged.
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Xu, X., Ouyang, J., Jiang, T. et al. Numerical analysis of the impact of two droplets with a liquid film using an incompressible SPH method. J Eng Math 85, 35–53 (2014). https://doi.org/10.1007/s10665-013-9634-9
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DOI: https://doi.org/10.1007/s10665-013-9634-9