Theoretical analysis on the applicability of traditional SPH method
文献类型：期刊论文
| 作者 | Zhou GuangZheng; Ge Wei; Li JingHai |
| 刊名 | CHINESE SCIENCE BULLETIN
 |
| 出版日期 | 2013-08-01 |
| 卷号 | 58期号:24页码:2970-2978 |
| 关键词 | smoothed particle hydrodynamics fluid mechanics accuracy Couette flow particle methods |
| 英文摘要 | As a fully Lagrangian, particle-based numerical method, the traditional smoothed particle hydrodynamics (SPH) generally suffers from the accuracy problem. To investigate the physical origins of this numerical error, the elastic effect between SPH particles is specifically identified by analogy with physical entities, and a unique non-dimensional number is proposed to evaluate the relative dominance of viscous to elastic effect. Through the simulation of two-dimensional Couette flow, the velocity profile and arrangement of particles are examined for various ratios of viscous to elastic effect. The effective viscosity of SPH particles decreases as this non-dimensional number increases, while the increase of particle number significantly reduces the effective viscosity only at lower ratio of viscous to elastic effect. The disparity among nominal viscous dissipation, total dissipation, and theoretical dissipation further confirms the presence of unphysical dissipation resulting from the elastic effect. In summary, due to the constraints from the Mach number and the ratio of viscous to elastic effect, there exists a critical Reynolds number below which the Newtonian behavior could be approximately obtained through suitable choice of model parameters. |
| WOS标题词 | Science & Technology |
| 类目[WOS] | Multidisciplinary Sciences |
| 研究领域[WOS] | Science & Technology - Other Topics |
| 关键词[WOS] | SMOOTHED PARTICLE HYDRODYNAMICS ; FREE-SURFACE FLOWS ; LOW-REYNOLDS-NUMBER ; APPLIED MECHANICS ; NUMERICAL-SIMULATION ; MOLECULAR-DYNAMICS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000323343800011 |
| 公开日期 | 2015-05-27 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/13664]  |
| 专题 | 过程工程研究所_研究所（批量导入） |
| 作者单位 | Chinese Acad Sci, Inst Proc Engn, State Key Lab Multiphase Complex Syst, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhou GuangZheng,Ge Wei,Li JingHai. Theoretical analysis on the applicability of traditional SPH method[J]. CHINESE SCIENCE BULLETIN,2013,58(24):2970-2978. |
| APA | Zhou GuangZheng,Ge Wei,&Li JingHai.(2013).Theoretical analysis on the applicability of traditional SPH method.CHINESE SCIENCE BULLETIN,58(24),2970-2978. |
| MLA | Zhou GuangZheng,et al."Theoretical analysis on the applicability of traditional SPH method".CHINESE SCIENCE BULLETIN 58.24(2013):2970-2978. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。