IMECH-IR  > 非线性力学国家重点实验室
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
AbstractThe 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.
Indexed BySCI ; EI
WOS IDWOS:000444457300001
WOS Research AreaEngineering, Mechanical ; Mechanics
WOS SubjectEngineering ; Mechanics
Funding OrganizationNational Natural Science Foundation of China [11702302, 11472030, 11572331] ; Fundamental Research Funds for Central Universities [YWF-16-JCTD-A-05] ; [XDB22040104]
Citation statistics
Cited Times:5[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.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
Recommended Citation
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.
Files in This Item: Download All
File Name/Size DocType Version Access License
IrJ2018324.pdf(8525KB)期刊论文出版稿开放获取CC BY-NC-SAView Download
Related Services
Recommend this item
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[王洪平]'s Articles
[Gao Q]'s Articles
[王士召]'s Articles
Baidu academic
Similar articles in Baidu academic
[王洪平]'s Articles
[Gao Q]'s Articles
[王士召]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[王洪平]'s Articles
[Gao Q]'s Articles
[王士召]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: IrJ2018324.pdf
Format: Adobe PDF
All comments (0)
No comment.

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.