Spatiotemporal optimization on cross correlation for particle image velocimetry
文献类型：期刊论文
| 作者 | Xie ZM(谢宗明); Wang HP(王洪平); Xu D(徐多)
|
| 刊名 | PHYSICS OF FLUIDS
 ; 5
|
| 出版日期 | 2022-05 |
| 卷号 | 34页码:55105 |
| ISSN号 | 1070-6631 |
| DOI | 10.1063/5.0091839 |
| 英文摘要 | We introduce an optimization method for the cross-correlation operation in particle image velocimetry by locating the correlation peaks assisted with constraint conditions. In this study, an objective function was constructed to include the residual of the normalized cross-correlation term, a component in charge of spatial smoothness (inspired by the optical flow method as used in a previous study) and a component for temporal smoothness (inspired by the concept of trajectory selection in particle tracking velocimetry). Minimizing the objective function gives optimized velocity fields for a series of tracer images for spatiotemporal smoothness. The proposed method was examined in synthetic images of turbulent flow and Batchelor vortex and in a laboratory experiment of vortex rings. The effect of image background noises and the initial guess for the optimization process were examined and discussed. Published under an exclusive license by AIP Publishing. |
| 学科主题 | Mechanics ; Physics, Fluids & Plasmas |
| 分类号 | 一类/力学重要期刊 |
| 语种 | 英语 |
| WOS记录号 | WOS:000810788800004 |
| 资助机构 | NSFC Basic Science Center Program [11988102] ; National Natural Science Foundation of China [92152106] ; Chinese Academy of Sciences [E1Z10101] |
| 其他责任者 | Xu, D (corresponding author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China. ; Xu, D (corresponding author), Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China. |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/90207]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 作者单位 | 1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China 2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xie ZM,Wang HP,Xu D. Spatiotemporal optimization on cross correlation for particle image velocimetry[J]. PHYSICS OF FLUIDS, 5,2022,34:55105. |
| APA | 谢宗明,王洪平,&徐多.(2022).Spatiotemporal optimization on cross correlation for particle image velocimetry.PHYSICS OF FLUIDS,34,55105. |
| MLA | 谢宗明,et al."Spatiotemporal optimization on cross correlation for particle image velocimetry".PHYSICS OF FLUIDS 34(2022):55105. |
入库方式： OAI收割
来源：力学研究所
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