Extensional Study of Optical-Flow Enhanced Hybrid Piv Method for Dual-Plane Stereoscopic Piv Measurement
Document Type
Article
Publication Date
9-1-2022
Identifier/URL
42933977 (Pure)
Abstract
High-speed dual-plane stereoscopic particle image velocimetry (DP-s-PIV) can capture time-resolved three-component velocity and vorticity vectors in the measurement region, but its spatial resolvability of tiny vortices is blocked by the intrinsic limitation of the cross-correlation evaluation. To overcome this limitation, we propose a scheme to extend the original two-component optical-flow enhanced hybrid PIV method to DP-s-PIV through 3D reconstruction, with its feasibility and resolvability validated through comparison with the cross-correlation evaluation used in DaVis 8.4. The comparisons suggest that the optical-flow enhanced hybrid PIV scheme can greatly improve the spatial resolvability of the velocity field for DP-s-PIV. Moreover, the hybrid scheme can also provide better visualization of vortical structures and enhanced precision in evaluating the vorticity distribution, allowing for further identification of vortex types in a stratified swirling jet flow through the combined criteria (vorticity component and Q criterion).
Repository Citation
Wang, S.,
Zheng, J.,
Li, L.,
Xia, X.,
Han, X.,
Zhang, C.,
Qi, F.,
& Yang, Z.
(2022). Extensional Study of Optical-Flow Enhanced Hybrid Piv Method for Dual-Plane Stereoscopic Piv Measurement. Measurement Science and Technology, 33 (9).
https://corescholar.libraries.wright.edu/mme/573
DOI
10.1088/1361-6501/ac6fb1
