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Showing 1 to 20 of 313 for “"PIV"”.
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2D PIV Study of Grid Turbulence
… Two-dimensional particle image velocimetry ($2D~PIV$) of highly resolved grid turbulence at $Re_{M}=U_{\infty}M/\nu = 16000$ where $M$ is the grid rod spacing was analysed. Data spanning the downstream range $65 < x/M < 145$ was captured separately on planes parallel to a water channel's floor …
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Elliptic Aerofoil aerodynamics in a developed PIV facility
… velocimetría por imágenes de partículas (PIV) y anemometría de hilo caliente (HWA). Esta investigación requirió el diseño u construcción de un túnel de viento de baja velocidad para llevar a cabo la campaña de medidas, en particular las realizadas con PIV. El desarrollo de la instalación …
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Tomographic PIV measurement of coherent dissipation scale structures
… using Tomographic Particle Image Velocimetry (TPIV). TPIV software was developed, with a novel approach permitting a significant reduction in processing time, and a series of numerical accuracy studies contributing to the fundamental understanding of this new technique. Basic flow …
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Time-Resolved PIV Measurements of Ship Airwakes with Quartering Winds
… and planar particle image velocimetry (PIV) measurements were made for three crosswise planes and a single centerline streamwise plane. Measurements included various configurations with the bow of the ship model at two different quartering wind conditions of 10 and 20 degrees, as well as …
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A Study of Ship Airwakes Using Dual Plane Stereoscopic PIV
<p>The airwake of a model Simple Frigate Shape 2 (SFS2) was studied in a low-speed wind tunnel. This airwake was measured using a novel time-dependent, dual plane, stereoscopic particle image velocimetry approach. Two flow planes over the flight deck, one parallel and one perpendicular to the …
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Zeitaufgelöste PIV-Untersuchungen zur Strömungskontrolle mittels elektromagnetischer Kräfte in schwach leitfähigen Fluiden
… zeitaufgelöster Particle Image Velocimetry (PIV) untersucht. Dabei wurde für verschiedene Anstellwinkel und Reynoldszahlen die Frequenz der Anregung, deren Impulseintrag und der zeitliche Kraftverlauf variiert. Strömungsmechanische Untersuchungen experimenteller und numerischer Natur wurden …
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Stereoscopic PIV measurements and proper orthogonal decomposition of a supersonic axisymmetric base flow
… using stereo particle image velocimetry (S-PIV). Two overlapping velocity vector fields are simultaneously acquired and stitched together to obtain a high-resolution velocity vector field of the full flow. Statistics derived from the measurements, including the mean velocities and turbulence …
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Measurement and Analysis of Full-Scale Room Airflow Using Particle Image Velocimetry (Piv) Techniques
The measured quantitative velocity data can be used to evaluate ventilation equipment and system design by manufacturers, optimize performance of ventilation equipment and systems, optimize environment of animals in different ages and stages, and validate numeric models. This measurement method is …
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Cross-plane stereo-PIV measurements of a turbulent boundary layer over highly irregular roughness
… stereo particle image velocimetry (PIV) measurements were conducted in the cross-flow, spanwise-wall-normal, plane at moderate Reynolds number. The single-point turbulence statistics in this plane displayed strong spanwise heterogeneity, in particular spanwise-alternating low- and …
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Towards predicting dynamics in turbulent premixed combustion using PIV-PLIF measurements of flow-flame microstructure
… high-resolution particle image velocimetry (PIV) is used to quantify the micro-scale structure of the flow, while planar laser-induced fluorescence (PLIF) of OH radical is used to investigate the flame microstructure. Results demonstrate that combustion dynamics in wake-stabilized flames can …
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Uncertainties associated with the postprocessing of 2-D particle image velocimetry (PIV) velocity data of unsteady flow fields
Includes bibliographical references (pages 108-110).
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Comparison of RANS Modeling to Dual-Plane PIV Measurements of the Turbulent Tip Vortex Trailed from a Hovering Rotor
… detailed, dual plane Particle Image Velocimetry (PIV) measurements of a turbulent tip vortex trailed from a single-bladed rotor. The work investigated both the required mesh resolution and most suitable turbulence closure models with rotational/curvature corrections by assessing their predictions …
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Assessment of shaped film cooling holes at high density ratios for gas turbine cooling using S-PIV and PSP.
… using Stereo-Particle Image Velocimetry (S-PIV). Experiments are performed at various locations where the coolant-to-mainstream interaction is captured using multiple density ratios and blowing ratios. Using S-PIV the three-dimensional flow field is measured and coupled with surface …
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An Experimental Study of Formation of Circulation Patterns in Laminar Unsteady Driven Cavity Flows Using Particle Image Velocimeter (PIV) Techniques
… velocity lid using Particle Image Velocitmetry (PIV). Experiments were conducted with water, seeded with hollow glass sphere particles 10 microns in diameter, at three different lid velocities leading to Reynolds numbers in the high laminar to transitional range. Driven Cavity Flow is a classic …
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Development of a test section featuring a flat plate conditioned for the study of fully developed turbulent boundary layers using PIV
… primarily using Particle Image Velocimetry (PIV). The initial section will focus on providing motivation of why it can be of interest to study turbulence. The following section will provide a historical context of the development of the Navier-Stokes equations which attempt to mathematically …
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DARTPIV : Dynamic Adaptive Real-Time Particle Image Velocimetry
Particle Image Velocimetry (PIV) is a technique that allows for the detailed visualization of fluid flow. By performing computational analysis on images taken by a high-sensitivity camera that monitors the movement of laser-illuminated tracer particles over time, PIV is capable of producing a …
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