Results 21 to 30 of about 11,468,149 (219)
Uncertainty Estimation Methods in Particle Image Velocimetry [PDF]
EPJ Web of Conferences, 2022 The aim of present work is focused on determining accuracy of the measurement using the Particle Image Velocimetry based on an analysis of synthetic Uniform flow test and Couette flow test.
Novotný Jan +2 more
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Frontiers in Water, 2021 Non-intrusive technologies for the in-situ measurement of river morphological features are increasingly popular in the scientific and practice communities due to their efficient and productive data acquisition.
H. You, M. Muste, D. Kim, S. Baranya
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Adaptively monitoring streamflow using a stereo computer vision system [PDF]
Hydrology and Earth System Sciences, 2023 The gauging of free surface flows in waterways provides the foundation for monitoring and managing the water resources of built and natural environments.
N. R. Hutley +7 more
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Recent Advancements and Perspectives in UAS-Based Image Velocimetry
Drones, 2021 Videos acquired from Unmanned Aerial Systems (UAS) allow for monitoring river systems at high spatial and temporal resolutions providing unprecedented datasets for hydrological and hydraulic applications.
Silvano Fortunato Dal Sasso +2 more
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Correlation image velocimetry: a spectral approach [PDF]
Applied Optics, 2002 A method, believed to be new, is introduced to evaluate displacement fields from the analysis of a deformed image compared with a reference image. In contrast to standard methods, which determine a piecewise constant displacement field, the present method gives direct access to spectral decomposition of the displacement field.
Roux, Stéphane +2 more
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River Surface Velocimetry Based on Virtual River Dataset and Modulated-RAFT
IEEE Access, 2023 In recent years, there has been a surge of interest in image-based velocimetry methods for river surface velocity (RSV) estimation due to their efficiency and accuracy, including large-scale particle image velocimetry (LSPIV), space-time image ...
Yixin Wu +5 more
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Scientific Data, 2021 Measurement(s) velocity • depth of water Technology Type(s) particle-image velocimetry • ultrasonic velocimetry • ultrasonic transit time probe Factor Type(s) square cylinder immersion rate Machine-accessible metadata file describing the reported data ...
Marina Oukacine +3 more
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Meta-uncertainty for particle image velocimetry [PDF]
Measurement Science and Technology, 2021 Abstract Uncertainty quantification for particle image velocimetry (PIV) is critical for comparing experimentally measured flow fields with computational fluid dynamics results, and model design and validation. However, PIV features a complex measurement chain with coupled, non-linear error sources, and quantifying the uncertainty is ...
Lalit K Rajendran +3 more
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Image correlation velocimetry [PDF]
Experiments in Fluids, 1995 This paper focuses on the correlation of two successive scalar images for the purpose of measuring imaged fluid motions. A method is presented for deforming, or transforming, one image to another. Taylor series expansions of the Lagrangian displacement field are used, in conjunction with an integral form of the equations of motion, to approximate this ...
Tokumaru, P. T., Dimotakis, P. E.
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Robust Image-Based Streamflow Measurements for Real-Time Continuous Monitoring
Frontiers in Water, 2021 The volumetric flow rate in rivers is essential to analyze hydrological processes and at the same time it is one of the most difficult variables to measure. Image based discharge measurements possess several advantages, one of them being that the sensor (
Salvador Peña-Haro +4 more
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