Application Of Image Processing To The Analysis Of Three-Dimensional Flow Fields

Chang, T.P.K.; Wilcox, Neal A.; Tatterson, Gary B.

doi:10.1117/12.7973279

Cited by 51 publications

(21 citation statements)

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“…Chang and Tatterson (1983) introduced a stereoscopic 3D PTV system, further developed by Racca and Dewey (1988). Nishino et al (1988) presented a 3D PTV system that allowed arbitrary viewing directions and yielded, on average, about 160 velocity vectors in a measurement of an unsteady laminar Couette flow.…”

Section: Introductionmentioning

confidence: 99%

3D scanning particle tracking velocimetry

Hoyer¹,

Holzner²,

Lüthi

et al. 2005

Exp Fluids

111

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In this article, we present an experimental setup and data processing schemes for 3D scanning particle tracking velocimetry (SPTV), which expands on the classical 3D particle tracking velocimetry (PTV) through changes in the illumination, image acquisition and analysis. 3D PTV is a flexible flow measurement technique based on the processing of stereoscopic images of flow tracer particles. The technique allows obtaining Lagrangian flow information directly from measured 3D trajectories of individual particles. While for a classical PTV the entire region of interest is simultaneously illuminated and recorded, in SPTV the flow field is recorded by sequential tomographic high-speed imaging of the region of interest. The advantage of the presented method is a considerable increase in maximum feasible seeding density. Results are shown for an experiment in homogenous turbulence and compared with PTV. SPTV yielded an average 3,500 tracked particles per time step, which implies a significant enhancement of the spatial resolution for Lagrangian flow measurements.

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Section: Introductionmentioning

confidence: 99%

3D scanning particle tracking velocimetry

Hoyer¹,

Holzner²,

Lüthi

et al. 2005

Exp Fluids

111

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“…It was first introduced by Chang et al [16] and further developed by Racca and Dewey [17]. 3D-PTV has helped to understand a number of turbulence-driven phenomena [e.g.…”

Section: Introductionmentioning

confidence: 99%

On the Lagrangian features of circular and semicircular jets via 3D Particle Tracking Velocimetry

Kim

Zhang

Liberzon

et al. 2016

Experimental Thermal and Fluid Science

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“…Because the actual path of the particles is analyzed, particle-tracking techniques are generally more accurate than PIV-based techniques (Cowen and Monismith 1997;Moroni and Cenedese 2005). The technique of 3D particle tracking was introduced by Chang and Taterson (1983) and further developed by (among others) Maas et al (1993). Suzuki et al (2000) applied 3D-PTV to simultaneous measurements of fluid and dispersed phases in a turbulent water channel flow and clarify the mutual interaction between near-wall coherent structures and solid particles.…”

Section: Introductionmentioning

confidence: 99%

Investigation of penetrative convection in stratified fluids through 3D-PTV

et al. 2009

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Testing existing theories of flow and transport in stably stratified fluids when ''penetrative convection'' occurs requires experimental methods capable of fully three-dimensional descriptions of both the Eulerian velocity field and Lagrangian particle trajectories. Boundary layer experiments utilizing a photogrammetric three-camera three-dimensional Particle Tracking Velocimetry (3D-PTV) technique were performed on a laboratory model which simulated the evolution of the mixing layer in a stably stratified fluid body by heating a tank filled with water from below. A combination of image-and object space-based information was employed to establish the spatio-temporal correspondences between particle positions at consecutive time steps. An appropriate calibration procedure for the stereoscopic system provides the intrinsic and extrinsic parameters of the stereoscopic system to be used for determining the correspondence of points in the object or world reference frame and in the image reference frame. The photogrammetric principles used by 3D-PTV are described. First, the fundamental mathematical model of the collinearity condition and its extensions are explained. Then, the epipolar line intersection method built upon multicamera correspondences (structure-from-stereo) is discussed as well as the procedure of reconstruction of particle trajectories in a single step by conjunctly establishing the spatial and temporal correspondences between particle images. Tests on simulated data were performed as well as experimental data in order to ensure the method's operability and robustness. The reconstructed velocity fields are compared to other laboratory investigations and field data.

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Application Of Image Processing To The Analysis Of Three-Dimensional Flow Fields

Cited by 51 publications

References 0 publications

3D scanning particle tracking velocimetry

3D scanning particle tracking velocimetry

On the Lagrangian features of circular and semicircular jets via 3D Particle Tracking Velocimetry

Investigation of penetrative convection in stratified fluids through 3D-PTV

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