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| Simulation of complex flow of multi-droplet impingement on a free surface by δ-SPH method |
| Received:May 23, 2023 Revised:August 18, 2023 |
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| DOI：10.7511/jslx20230523002 |
| KeyWord:meshless method δ-SPH droplet impact free surface complex flow |
| Author | Institution |
| 郑春耀 |
中国科学院过程工程研究所 介科学与工程全国重点实验室, 北京 ;中国科学院大学 化学工程学院, 北京 |
| 周媛 |
石油化工研究院 过程模拟计算中心, 北京 |
| 张林 |
中国科学院过程工程研究所 介科学与工程全国重点实验室, 北京 |
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| Abstract: |
| Based on the δ-SPH method,the multi-droplet impingement on a free surface is simulated and analyzed.First,by adding a density dissipation term and am artificial viscous term in the governing equations,the spurious numerical oscillations in pressure can be removed and the stability of the numerical scheme is ensured.Then,the impact of a single droplet on a free surface is simulated,and the reliability of the δ-SPH method is verified by comparison with the results reported in the literature.Finally,two droplets with a vertical/horizontal distribution,four droplet’s with a rhombus distribution,which impinge on a free surface,are simulated,and the effects of the droplet vertical/horizontal travel.on the impact structure are analyzed.The numerical results show that:the δ-SPH method can exactly capture the strong-nonlinearity phenomena such as splashing,liquid large-amplitude sloshing and discontinuous free surface when multi-droplets impinge on a free surface,and a smooth pressure field is also obtained. |
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