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Showing 1 to 13 of 13 for “"particle imaging velocimetry"”.
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Modeling and simulation of Fluid-based gyroscope (Particle Imaging Velocimetry Gyroscope)
… sensitivity and bandwidth cannot be compared. Particle Imaging Velocimetry Gyroscope (PIVG) is a fluid-based sensor that was first introduced in 2020. The PIVG sensor shall have a conceptual design based on the particle imaging velocimetry technique, which is an experimental tool of fluid …
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Characterization of Pressure-Driven and Electro-Kinetically Driven Flow in a Micro-Fluidic Chip Using Particle Imaging Velocimetry
… a laser confocal microscope. This showed that particles easily stuck to the channel making it difficult to measure over time. In addition, bubble formation in the channel made measuring velocities difficult. Current work used a LabSmith Video Synchronized microscope with software to measure the …
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The attenuation of flow-induced tonal noise using plasma actuators
… been investigated. Measurements using oil flow, particle imaging velocimetry, boundary layer surveys and surface mounted microphone measurements were taken. Experiments were conducted in a low speed wind tunnel running at freestream velocities between 10 m/s and 20 m/s corresponding to Reynolds …
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Advances in the visualization and analysis of boundary layer flow in swimming fish
… The profiling system combined robotics, particle imaging velocimetry, a custom particle tracking code, and an automatic boundary layer analysis code. Over 100,000 image pairs of flow in the boundary layer were acquired in swimming fish alone, making spatial and temporal ensemble averaging …
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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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Conceptual Design and Instrumentation Study for a 2-D, Linear, Wet Steam Turbine Cascade Facility
… techniques. The second method uses advanced particle imaging velocimetry techniques possibly for the first time in wet steam. A new method is then proposed to modify the two techniques to take measurements at non-equilibrium states. Finally accuracy issues are discussed and the challenges …
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Spatio-temporal Characteristics of a Spray from a Liquid Jet in Crossflow
… Analyzer, PDA, and a time resolved, digital, particle imaging velocimetry system, TRDPIV. The measurements include instantaneous and time-averaged liquid phase velocity fields, spray penetration and core location in the near field and far field of the spray resulting from the liquid jet …
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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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Advances in the visualization and analysis of boundary layer flow in swimming fish
… The profiling system combined robotics, particle imaging velocimetry, a custom particle tracking code, and an automatic boundary layer analysis code. Over 100,000 image pairs of flow in the boundary layer were acquired in swimming fish alone, making spatial and temporal ensemble averaging …
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Flapping motion of a three-dimensional foil for propulsion and maneuvering of underwater vehicles
… velocities were measured using Laser Doppler Velocimetry (LDV) and Digital Particle Imaging Velocimetry (DPIV) in three ancillary experiments. First, mean velocities across the wake at five spanwise locations were recorded using LDV. The wake width was found to be the excursion of the foil at …
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An Experimental Study of Soot Formation in Dual Mode Laminar Wolfhard-Parker Flames
… with temperature using Thermocouple Particle Densitometry (TPD). Soot volume fraction, particle size and particle number density fields were measured using laser light scattering and extinction. Gas velocities were measured using Particle Imaging Velocimetry (PIV) on the non-premixed …
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The flow structure of interacting barchan dunes
High-resolution particle-image velocimetry (PIV) experiments have been conducted over a fixed-bed to examine the effects of interacting barchan dunes on the flow structure. The barchan dune models were based upon an idealized contour map, the shape and dimensions of which were based upon previous …
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Fundamental studies in hydrogen-rich combustion : instability mechanisms and dynamic mode selection
… each case. High-speed video and stereographic particle imaging velocimetry were used to explore the dynamic interactions between the flame and the flow field of the combustor. Stable, quasi-stable, and unstable operating modes were identified in each combustor, with each mode characterized by a …