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Error reduction for time-resolved PIV data based on Navier-Stokes equations
Wang HP(王洪平); Gao Q; Wang SZ(王士召); Li YH; Wang ZY; Wang JJ
2018-10-01
发表期刊EXPERIMENTS IN FLUIDS
卷号59期号:10页码:149
ISSN0723-4864
摘要The post-processing of the measured velocity in particle image velocimetry (PIV) is a critical step in reducing error and predicting missing information of the flow field. In this work, time-resolved PIV data are incorporated with the incompressible Navier-Stokes (N-S) equations to reduce the measurement error and improve the accuracy. A pressure correction scheme (PCS) based on the projection method is adopted to solve the N-S equations, and an optimization algorithm is introduced to balance the fidelity between the PIV data and the numerical solutions. The PCS for PIV data, called PIV-PCS, cannot only reduce the errors in the velocity divergence and the curl of the pressure gradient but also ensure that the flow field satisfies the dynamic constraints imposed by the momentum equation. An important weight coefficient s that balances the level of the velocity modification with the residual of the governing equation is defined and numerically assessed. A method for optimizing the value of s is provided. The new approach is evaluated by two time-resolved PIV experiments: one on the 2D wake flow of a circular cylinder at low Reynolds number and one on tomographic PIV for the 3D wake flow of a hemisphere at high Reynolds number. All the numerical assessments and experimental applications are compared with the divergence-free smoothing (DFS) method. The results indicate that the presented PIV-PCS method is superior to the DFS method in terms of reducing the measurement error and recovering the real physical flow structures.
DOI10.1007/s00348-018-2605-1
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收录类别SCI ; EI
语种英语
WOS记录号WOS:000444457300001
关键词[WOS]LAMINAR BOUNDARY-LAYER ; HAIRPIN VORTICES ; FLOW ; VELOCIMETRY
WOS研究方向Engineering, Mechanical ; Mechanics
WOS类目Engineering ; Mechanics
项目资助者National Natural Science Foundation of China [11702302, 11472030, 11572331] ; Fundamental Research Funds for Central Universities [YWF-16-JCTD-A-05] ; [XDB22040104]
论文分区二类
力学所作者排名1
引用统计
文献类型期刊论文
条目标识符http://dspace.imech.ac.cn/handle/311007/77935
专题非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing, Peoples R China
2.Zhejiang Univ, Sch Aeronaut & Astronaut, Hangzhou, Zhejiang, Peoples R China
3.Beihang Univ, Minist Educ, Key Lab Fluid Mech, Beijing, Peoples R China
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GB/T 7714
Wang HP,Gao Q,Wang SZ,et al. Error reduction for time-resolved PIV data based on Navier-Stokes equations[J]. EXPERIMENTS IN FLUIDS,2018,59(10):149.
APA 王洪平,Gao Q,王士召,Li YH,Wang ZY,&Wang JJ.(2018).Error reduction for time-resolved PIV data based on Navier-Stokes equations.EXPERIMENTS IN FLUIDS,59(10),149.
MLA 王洪平,et al."Error reduction for time-resolved PIV data based on Navier-Stokes equations".EXPERIMENTS IN FLUIDS 59.10(2018):149.
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