IMECH-IR  > 流固耦合系统力学重点实验室
Jet and Mixing Characteristics in Single Raindrop Splash Problem
Alternative TitleThe raindrop impact is very important in soil erosion problems on hill slopes, while the splash characteristics (especially the jet and mixing) are crucial in raindrop impact processes. Focusing on the jet and mixing features in this process, a series of numerical experiments and discussion are conducted in this study. The meshless Smoothed Particle Hydrodynamics (SPH) method is employed and validated with the theoretical solution and experimental data. Two groups of numerical experiments, focusing on the jet around the rigid surface and the mixing between the drop and different underlain water layers respectively, are carried out. In the first group of numerical experiments, the effect of incidence angle of the drop is discussed. A high speed jet strip is found near the rigid surface and varied with incidence angle of the raindrop. In the second group of numerical experiments, it is found that full mixing between drop and water layer only happened in a very close range around the impact zone while the outer zone is just simply driven away. Two kinds of mechanism on jet occurrence and mixing are proposed and explained based on the simulated results.
An Y(安翼); Liu QQ(刘青泉)
Source PublicationProceedings of the 14th Asian Congress of Fluid Mechanics (14ACFM)
2013-10
Pagespp. 1188-1192
Conference NameThe 14th Asia Congress of Fluid Mechanics - 14ACFM
Conference DateOctober 15 - 19, 2013
Conference PlaceHanoi and Halong, Vietnam
AbstractThe raindrop impact is very important in soil erosion problems on hill slopes, while the splash characteristics (especially the jet and mixing) are crucial in raindrop impact processes. Focusing on the jet and mixing features in this process, a series of numerical experiments and discussion are conducted in this study. The meshless Smoothed Particle Hydrodynamics (SPH) method is employed and validated with the theoretical solution and experimental data. Two groups of numerical experiments, focusing on the jet around the rigid surface and the mixing between the drop and different underlain water layers respectively, are carried out. In the first group of numerical experiments, the effect of incidence angle of the drop is discussed. A high speed jet strip is found near the rigid surface and varied with incidence angle of the raindrop. In the second group of numerical experiments, it is found that full mixing between drop and water layer only happened in a very close range around the impact zone while the outer zone is just simply driven away. Two kinds of mechanism on jet occurrence and mixing are proposed and explained based on the simulated results.
KeywordErosion Drop Impact Splash Sph Mixing Inclined Impact Jet Stripe
DepartmentLMFS水环境流体力学(LEM)
Language英语
Document Type会议论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/47483
Collection流固耦合系统力学重点实验室
Recommended Citation
GB/T 7714
An Y,Liu QQ. Jet and Mixing Characteristics in Single Raindrop Splash Problem[C],2013:pp. 1188-1192.
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