Error reduction for time-resolved PIV data based on Navier-Stokes equations

doi:10.1007/s00348-018-2605-1

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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
发表期刊	EXPERIMENTS IN FLUIDS
	2018-10-01
卷号	59 期号:10 页码:149
ISSN	0723-4864
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.
DOI	10.1007/s00348-018-2605-1
URL	查看原文
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	被引频次：20[WOS] [WOS记录] [WOS相关记录]
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
推荐引用方式 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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