Results 31 to 40 of about 63,006 (231)
Adaptive particle image velocimetry based on sharpness metrics
Journal of the European Optical Society-Rapid Publications, 2018 Background Optical distortions can significantly deteriorate the measurement accuracy in particle image velocimetry systems. Such distortions can occur at fluctuating phase boundaries during flow measurement and result from the accompanied refractive ...
M. Teich +4 more
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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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Assessing different imaging velocimetry techniques to measure shallow runoff velocities during rain events using an urban drainage physical model [PDF]
Hydrology and Earth System Sciences, 2021 Although surface velocities are key in the calibration of physically based urban drainage models, the shallow water depths developed during non-extreme precipitation and the potential risks during flood events limit the availability of this type of data ...
J. Naves +3 more
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Ultrasound Imaging Velocimetry: a review [PDF]
Experiments in Fluids, 2016 Whole-field velocity measurement techniques based on ultrasound imaging (a.k.a. ‘ultrasound imaging velocimetry’ or ‘echo-PIV’) have received significant attention from the fluid mechanics community in the last decade, in particular because of their ability to obtain velocity fields in flows that elude characterisation by conventional optical methods ...
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Remote Sensing, 2020 River flow monitoring is essential for many hydraulic and hydrologic applications related to water resource management and flood forecasting. Currently, unmanned aerial systems (UASs) combined with image velocimetry techniques provide a significant low ...
Silvano Fortunato Dal Sasso +2 more
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Image-Based Experimental Measurement Techniques to Characterize Velocity Fields in Blood Microflows
Frontiers in Physiology, 2022 Predicting blood microflow in both simple and complex geometries is challenging because of the composition and behavior of the blood at microscale. However, characterization of the velocity in microchannels is the key for gaining insights into cellular ...
Andy Vinh Le +2 more
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Analytical/experimental comparison of the axial velocity in trailing vortices [PDF]
, 2011 The axial velocity of a vortex is a parameter which is known to be strongly related to the vortex breakdown, yet to date a complete description of its physical origins has not been achieved.
Benard, E., Giuni, M.
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Feasibility of Optical Flow Field Measurements of the Coolant in a Grinding Machine
Applied Sciences, 2021 For industrial grinding processes, the workpiece cooling by metalworking fluids, which strongly influences the workpiece surface layer quality, is not yet fully understood.
Björn Espenhahn +5 more
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Stability estimate for scalar image velocimetry
Journal of Inverse and Ill-posed Problems, 2023 Abstract In this paper, we analyze the stability of the system of partial differential equations modelling scalar image velocimetry. We first revisit a successful numerical technique to reconstruct velocity vectors u
Erik Burman +2 more
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Feature Tracking Velocimetry Applied to Airborne Measurement Data from Murg Creek
E3S Web of Conferences, 2018 A new image feature tracking velocimetry is presented and tested on airborne video data available from a previous study at Murg Creek (Canton Thurgau, Switzerland). Here, the seeded flow scenery had been recorded by an off-the-shelf action camera mounted
Cao Liekai +3 more
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