| Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability | |
Yang XF(杨秀峰) ; Liu MB(刘谋斌); Peng SL(彭世镠); Yang, XF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China.
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| Source Publication | COMPUTERS & FLUIDS
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| 2014-03-20 | |
| Volume | 92Pages:199-208 |
| ISSN | 0045-7930 |
| Abstract | Smoothed particle hydrodynamics (SPH), as a Lagrangian meshfree particle method, has been applied to modeling viscous liquid drop with surface tension and wetting dynamics. In the SPH model, the van der Waals (vdW) equation of state is usually used to describe the gas-to-liquid phase transition similar to that of a real fluid. However, the attractive forces between SPH particles originated from the cohesive pressure of the vdW equation of state can lead to tensile instability, which is associated with unphysical phenomena such as particle clustering or blowing away. This paper presents an improved SPH method for modeling viscous liquid drop. The inherent tensile instability in SPH is removed by using a hyperbolicshaped kernel function which possesses non-negative second derivatives. A single-step approximation for heat flux is used in modeling viscous liquid drop with smoother temperature field. The formations of viscous liquid drops, both in 2D and 3D, are tested and it clearly demonstrates that the tensile instability can be effectively removed. The improved SPH method is also used to model two other numerical examples including the oscillation and binary collision of liquid drops without tensile instability. (C) 2014 Elsevier Ltd. All rights reserved. |
| Keyword | Liquid Drop Smoothed Particle Hydrodynamics Tensile Instability |
| Subject Area | Computer Science ; Mechanics |
| URL | 查看原文 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000332264700016 |
| Funding Organization | This work has been supported by the National Natural Science Foundation of China (11302237 and 11172306). |
| Department | LMFS冲击与耦合效应(LHO) |
| Classification | 二类/Q2 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/48761 |
| Collection | 流固耦合系统力学重点实验室 |
| Corresponding Author | Yang, XF (reprint author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. |
| Recommended Citation GB/T 7714 | Yang XF,Liu MB,Peng SL,et al. Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability[J]. COMPUTERS & FLUIDS,2014,92:199-208. |
| APA | Yang XF,Liu MB,Peng SL,&Yang, XF .(2014).Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability.COMPUTERS & FLUIDS,92,199-208. |
| MLA | Yang XF,et al."Smoothed particle hydrodynamics modeling of viscous liquid drop without tensile instability".COMPUTERS & FLUIDS 92(2014):199-208. |
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