Results 31 to 40 of about 132,662 (256)
Frontiers in Earth Science, 2022 The possible use of both radiography and ultrasonography to visualise flow dynamics in cohesive sediments, also known as fluid mud, has been assessed. Ultimately, these techniques are intended to enable the application of Particle Image Velocimetry (PIV)
Bart Brouwers +4 more
doaj +1 more source
Single camera 3D planar Doppler velocity measurements, using two frequency planar Doppler velocimetry (2v-PDV) and imaging fibre bundles [PDF]
, 2006 A modified Planar Doppler Velocimetry (PDV) technique, two frequency PDV (2v-PDV), is described that allows measurements of the velocity field over a plane defined by a laser light sheet using sequential illumination of the flow with two closely ...
Charrett, Thomas O. H. +2 more
core +1 more source
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
doaj +1 more source
SPIRou: NIR velocimetry and spectropolarimetry at the CFHT [PDF]
, 2020 This paper presents an overview of SPIRou, the new-generation near-infrared spectropolarimeter/precision velocimeter recently installed on the 3.6-m Canada–France–Hawaii Telescope (CFHT).
J. Donati +68 more
semanticscholar +1 more source
Optics Letters, 1998 A method is reported for time- and space-resolved nonintrusive velocimetry of high-speed gas flows by measurement of the Doppler shift of light scattered from a laser-induced thermal grating. The principle is demonstrated by use of a pulsed frequency-doubled Nd:YAG laser to induce a thermal grating in NO(2) seeded into an argon flow.
Walker, D, Williams, R, Ewart, P
openaire +2 more sources
Four-dimensional dynamic flow measurement by holographic particle image velocimetry [PDF]
, 2005 The ultimate goal of holographic particle image velocimetry (HPIV) is to provide space- and time-resolved measurement of complex flows. Recent new understanding of holographic imaging of small particles, pertaining to intrinsic aberration and noise in ...
Meng, Hui, Pu, Ye
core +2 more sources
Imaging single-cell blood flow in the smallest to largest vessels in the living retina
eLife, 2019 Tissue light scatter limits the visualization of the microvascular network deep inside the living mammal. The transparency of the mammalian eye provides a noninvasive view of the microvessels of the retina, a part of the central nervous system.
Aby Joseph +2 more
doaj +1 more source
EVALUATION OF AIRBORNE IMAGE VELOCIMETRY APPROACHES USING LOW-COST UAVS IN RIVERINE ENVIRONMENTS [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2020 Traditional flow velocity measurements in natural environments require contact with the fluid and are usually costly, time-consuming and, sometimes, even dangerous.
F. Ioli +4 more
doaj +1 more source
Considerations When Applying Large-Scale PIV and PTV for Determining River Flow Velocity
Frontiers in Water, 2021 Large-scale image velocimetry is a novel approach for non-contact remote sensing of flow in rivers. Research within this topic has largely focussed on developing specific aspects of the image velocimetry work-flow, or alternatively, testing specific ...
Martin J. Jolley +3 more
doaj +1 more source
Uncertainty quantification in particle image velocimetry
Measurement science and technology, 2019 Particle image velocimetry (PIV) has become the chief experimental technique for velocity field measurements in fluid flows. The technique yields quantitative visualizations of the instantaneous flow patterns, which are typically used to support the ...
A. Sciacchitano
semanticscholar +1 more source