1. Second order and transverse flow visualization through three-dimensional particle image velocimetry in millimetric ducts.
- Author
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Harte, N.C., Obrist, D., Versluis, M., Jebbink, E. Groot, Caversaccio, M., Wimmer, W., and Lajoinie, G.
- Subjects
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PARTICLE image velocimetry , *COMPUTATIONAL fluid dynamics , *FLOW visualization , *THREE-dimensional imaging , *AXIAL flow - Abstract
Despite recent advances in 3D particle image velocimetry (PIV), challenges remain in measuring small-scale 3D flows, in particular flows with large dynamic range. This study presents a scanning 3D-PIV system tailored for oscillatory flows, capable of resolving transverse flows less than a percent of the axial flow amplitude. The system was applied to visualize transverse flows in millimetric straight, toroidal, and twisted ducts. Two PIV analysis techniques, stroboscopic and semi-Lagrangian PIV, enable the quantification of net motion as well as time-resolved axial and transverse velocities. The experimental results closely align with computational fluid dynamics (CFD) simulations performed in a digitized representation of the experimental model. The proposed method allows the examination of periodic flows in systems down to microscopic scale and is particularly well-suited for applications that cannot be scaled up due to their complex, multi-physics nature. • 3D scanning Particle Image Velocimetry system for measuring oscillating flows. • Stroboscopic and semi-Lagrangian Particle Image Velocimetry analysis. • Net motion and time-resolved flow quantification with two analysis methods. • Validation of experimental data with computational fluid dynamics simulations. • Effect of geometry on transverse flow in millimetric ducts. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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