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Showing 1 to 20 of 41 for “"Particle Tracking Velocimetry"”.
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Three-dimensional particle tracking velocimetry for turbulence applications
Three-dimensional particle tracking velocimetry (3D-PTV) is a flow measure- ment technique that tracks the Lagrangian paths of a set of particles using photogrammetric principles. This technique allows to investigate complex fluid flows by measuring velocity and acceleration along particle …
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3D particle tracking velocimetry using synthetic aperture imaging
… currently used to visualize flow fields, particle image velocimetry (PIV) offers great advantages because of the high resolution quantitative results it provides. The feasibility of using synthetic aperture (SA) imaging to conduct 3D Particle Image Velocimetry (PIV) has been previously …
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Lagrangian dynamics of turbulence: Applications with 3D particle tracking velocimetry
… for a distinct characterization of the motion of particles. It is particularly useful in the understanding of dispersion, mixing, and transport phenomena. Due to the complexity and difficulty in quantifying Lagrangian properties, experimental studies on turbulence-driven phenomena in the …
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Three-dimensional particle tracking velocimetry study of marine organism wake behavior
Three-dimensional particle tracking velocimetry (3D-PTV) is a flow measurement technique that tracks Lagrangian trajectories of passive tracer particles using stereoscopic imaging. The technique allows for detailed analysis of the velocities along particle trajectories in unsteady flows. The …
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Lagrangian acceleration measurements via PTVA (Particle Tracking Velocimetry and Accelerometry) on a turbulent-like flow
… acceleration is needed: a novel technique, Particle Tracking Velocimetry and Accelerometry (PTVA), based on Image Analysis techniques, has been designed, developed and validated. PTVA is a self-adaptive methods which relies on a number of positions to approximate the trajectories that adapts …
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Numerical and Experimental Study of Volumetric Particle Tracking Velocimetry in a Spatial and Temporal Domain
… for the purpose of demonstration. Fluorescent particles were employed to trace the fluid motion. An argon-iron laser was employed as the illumination system. The tube is immersed in a water tank to compensate for the light refraction occurring at the tube boundary. A method was proposed to …
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Algorithm optimization for real-time volumetric particle tracking velocimetry under non-uniform illumination for airflow studies
The student, Yu Zhao, submitted this Dissertation for approval on 2022-04-18 at 14:09.
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Development of preserved, fluorescent-dyed invasive carp eggs for particle tracking velocimetry in transport and dispersal control experiments
Submission original under an indefinite embargo labeled 'Open Access'. The submission was exported from vireo on 2025-03-28 without embargo terms
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Entwicklung eines Systems zur dreidimensionalen Particle Tracking Velocimetry mit Genauigkeitsuntersuchungen und Anwendung bei Messungen in einem Wind-Wellen Kanal
… ein neuartiges Verfahren der dreidimensionalen Particle Tracking Velocimetry vor. Durch die Erweiterung der existierenden zweidimensionalen Particle Tracking Velocimetry auf die dritte Raumdimension sind erstmals dreidimensionale Strömungsmessungen bei hoher räumlicher Auflösung mit lediglich …
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Design of an endoscopic 3-D Particle-Tracking Velocimetry system and its application in flow measurements within a gravel layer
… gravel pore. The images are processed by a 3-D Particle-Tracking Velocimetry (3-D PTV) algorithm, which yields the three-dimensional reconstruction of Lagrangian particle trajectories. The underlying image processing algorithms are significantly enhanced and adapted to the special conditions of …
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3D-flow measurement by stereo imaging
… des dreidimensionalen Strömungsfeldes mittels 'Particle Tracking Velocimetry' wird vorgestellt. Ein zweidimensionales Particle Tracking Velocimetry liegt dem Verfahren zugrunde. Es wurde auf die dritte Raumdimension erweitert, um den gesamten physikalischen Raum zu erfassen. Dieses Verfahren …
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Development of hybrid particle tracking algorithms and their applications in airflow measurement within an aircraft cabin mock-up
… solving indoor air quality problems. The Hybrid Particle Tracking Velocimetry (HPTV) system is aimed at fulfilling this need. It was developed based on existing Particle Tracking Velocimety (PTV) and Volumetric Particle Tracking Velocimetry (VPTV) techniques. The HPTV system requires three …
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Ein miniaturisiertes Endoskop-Stereomesssystem zur Strömungsvisualisierung in Kiesbetten
… dieser Vorverarbeitung der Daten der Einsatz von Particle Tracking Velocimetry möglich. Außerdem wird ein neues Verfahren verwendet, das die geometrische Kalibrierung bei einem derart kleinen Messvolumen stark vereinfacht.
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Subpixel Resolution Schemes for Multiphase Flows
This effort explores novel sub-resolution particle center estimation algorithms for Digital Particle Tracking Velocimetry (DPIV). The errors of these new methods were classified through Monte-Carlo simulations. These schemes provide direct measurements of the apparent particle image diameter and …
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Resonances and Mixing in Confined Time-dependent Stokes Flows: The experiments, Numerics, and Analytics
… results of numerical simulations, as well as 3D particle tracking velocimetry (3D-PTV) experimental results. Second, chaotic advection and mixing due to quasi-random jumps of the adiabatic invariant (AI) occurring when a streamline crosses the separatrix surfaces is studied. Analytical …
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Marine snow tracking stereo imaging system
The transport of particles of organic carbon from the ocean's surface to its bottom plays a key role in the global carbon cycle and carbon sequestration. Quantifying the rate of this Biological Carbon Pump - the size and velocity distribution of falling particles below the mixing layer, for example …
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Experimental Measurements of Vortex Breakdown with non-Isothermal Inflow
… velocity thus reducing the effective swirl. 3D Particle Tracking Velocimetry was used to obtain time-resolved flow fields of the vortex flow and breakdown with and without heating. Individual velocity profiles and velocity fields are presented, showing that flow behavior is dependent on much …
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Vector-valued multidimensional signal processing and analysis in the context of fluid flows
… field from random samples in the context of the Particle Tracking Velocimetry (PTV) or Particle Imaging Velocimetry (PIV) experiment. The theory of recovering vector-valued signals from random point processes is generalized from those for scalar-valued ones. Two interpolation methods are …
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Effect of width-to-depth ratio on the mean flow velocities for a Kinoshita meander bend
… current one is the technique used to measure. Particle Tracking Velocimetry (PTV), a non-intrusive technique, was adopted here to take the measurements. The technique allows measuring in the Kinoshita flume for higher width-to-depth ratios than it is feasible with the use of other techniques …
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