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Showing 1 to 12 of 12 for “"Particle tracking velocimetry (PTV)"”.
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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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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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Investigation of Particle Trajectories for Wall Bounded Turbulent Two-Phase Flows
… more than 40 years of research, operation with a particle-laden inlet flow remains a significant problem for modern turbomachines. The purpose, therefore, is to develop experimental methods for investigating multi-phase flows relevant to the cooling of gas turbine components. Initially, several …
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Evaluation of a Particle Sampling Probe to Measure Mass Concentration in Particle-Laden Flows
Particle ingestion is a prevalent issue for jet engines. During operation, sand and ash particles enter the engine and can cause serious problems, including erosion and buildup of Calcia-Magnesia-Alumina-Silicate (CMAS) deposits. Analyzing the particle mass concentration of the airflow can help …
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Local liquid velocity measurement of trickle bed reactor using digitial industrial X-ray radiography
<p>"Trickle Bed Reactors (TBRs) are fixed beds of particles in which both liquid and gas flow concurrently downward. They are widely used to produce not only fuels but also lubrication products. The measurement and the knowledge of local liquid velocities (VLL) in TBRs is less which is essential …
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Technique for Measuring the Coefficient of Restitution for Microparticle Sand Impacts at High Temperature for Turbomachinery Applications
… in gas turbine engines are functions of particle/wall interactions and the Coefficient of Restitution (COR) is a fundamental property of these interactions. COR depends on impact velocity, angle of impact, temperature, particle composition, and wall material. In the first study, a novel …
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Caracterização de microorganismos aquáticos por processamento digital de imagens e redes neurais artificiais
… de imagens de partículas em movimento (Particle Tracking Velocimetry - PTV). O trabalho está dividido em duas partes: 1) caracterização e contagem de microalgas e bactérias aquáticas em amostras e 2) medição da velocidade de movimentação das microalgas em lâminas de microscópio. A …
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Microfluidic Transverse AC Electrophoresis Systems for Multiparameter Characterization of Single Particles and Cells
Particle characterization techniques are essential in a wide range of fields, including biological sciences, material science, environmental studies, pharmaceutical, and clinical research. Despite the availability of numerous characterization methods, spanning both ensemble and single particle …
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Experimental Investigation of Temperature Effects on Microparticle Sand Rebound Characteristics at Gas Turbine Representative Conditions
When a gas turbine operates in a particle laden environment, such as a desert, small solid particles are ingested into the engine. The ingested sand particles can cause damage to engine components and reduce the service life of the engine. Particle ingestion causes the erosion of metal blades and …
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Experimental and Numerical Modeling of Dam-Break and Levee-Breach Flows
… The volume of fluid (VOF) was used for tracking the free surface. </p> <p> To study levee-breach flooding in an urban area, laboratory experiments were conducted on a 1:50 scale model of the 2005 17th Street Canal levee-breach in New Orleans, Louisiana. Steady state flow depths and flow …
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From meander bend to oxbow lake: morphodynamics and sedimentology of chute cutoffs
Chute cutoffs are common features of meandering channels. The development of a chute cutoff locally shortens and straightens a meandering river channel, excavating a large volume of floodplain sediment as the chute channel deepens and widens. Bar development at the upstream and downstream ends of …