Results 241 to 250 of about 252,611 (302)
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Chemical Engineering and Science, 2018
Particle Image Velocimetry (PIV) measurement in gas-liquid bubbly flows is a challenging task, mainly due to the dispersion of the laser light caused by the gas-liquid interfaces.
R. Cerqueira +3 more
semanticscholar +1 more source
Particle Image Velocimetry (PIV) measurement in gas-liquid bubbly flows is a challenging task, mainly due to the dispersion of the laser light caused by the gas-liquid interfaces.
R. Cerqueira +3 more
semanticscholar +1 more source
Spatial Spectrum From Particle Image Velocimetry Data
Journal of Nuclear Engineering and Radiation Science, 2019We present a simple method of obtaining the turbulence kinetic energy spectrum from spatially resolved particle image velocimetry (PIV) data without need of use of Taylor hypothesis of frozen turbulence. Additionally, this method allows us to extract the
Daniel Duda, V. Uruba
semanticscholar +1 more source
1989
One of the most challenging and time-consuming problems in experimental fluid mechanics is the measurement of the overall flow field properties, such as the velocity, vorticity, and pressure fields. Local measurements of the velocity field (i.e., at individual points) are now done routinely in many experiments using hot-wire (HW) or laser velocimetry ...
L. M. Lourenco +2 more
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One of the most challenging and time-consuming problems in experimental fluid mechanics is the measurement of the overall flow field properties, such as the velocity, vorticity, and pressure fields. Local measurements of the velocity field (i.e., at individual points) are now done routinely in many experiments using hot-wire (HW) or laser velocimetry ...
L. M. Lourenco +2 more
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Thermographic Particle Image Velocimetry
Imaging and Applied Optics 2014, 2014Planar high-speed temperature and velocity measurements in gaseous flows can be performed simultaneously using micrometer-sized thermographic phosphor particles as tracers. Validation of this concept and applications in turbulent flows will be presented.
Benoit Fond +2 more
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Rapid Impact Testing and System Identification of Footbridges Using Particle Image Velocimetry
Comput. Aided Civ. Infrastructure Eng., 2018The rapid impact testing of bridges contains unique advantages. For example, structural parameters, including frequency response function and structural flexibility matrix can be identified; however, additional impact‐testing instruments are required to ...
Yongding Tian, Jian Zhang, Shanshan Yu
semanticscholar +1 more source
2001
Particle Image Velocimetry (PIV) belongs to the class of optical “whole- field” measuring techniques. The name of the method is self-explaining: The velocity distribution in a whole field of a fluid flow is determined by measuring the displacements Δs that the images of tracer particles experience during a time interval Δt.
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Particle Image Velocimetry (PIV) belongs to the class of optical “whole- field” measuring techniques. The name of the method is self-explaining: The velocity distribution in a whole field of a fluid flow is determined by measuring the displacements Δs that the images of tracer particles experience during a time interval Δt.
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Stereoscopic particle image velocimetry
Measurement Science and Technology, 1991The three components of the velocity field in a plane can be measured simultaneously by combining particle image velocimetry (PIV) and stereoscopy. A set-up has been devised to take two stereoscopic images of the flow simultaneously with only one camera, thus making automatic recording of three-dimensional (3D) velocity fields quite straightforward ...
M P Arroyo, C A Greated
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Rainbow Particle Imaging Velocimetry
2017We introduce a new approach for snapshot imaging of time-resolved, non-stationary 3D fluid flows. Based on Particle Imaging Velocimetry (PIV), a well-established technique for fluid flow analysis, we propose a novel approach for spectral encoding of the third dimension.
Lamothe, Élodie +2 more
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Deep recurrent optical flow learning for particle image velocimetry data
Nature Machine Intelligence, 2021C. Lagemann +3 more
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Holographic Particle Image Velocimetry
Measurement Science and Technology, 2004Holography is truly the key to three dimensions in particle image velocimetry, i.e.?the measurement of all spatial components of the velocity vector - and this over a deep measuring field. Sophisticated instruments have been designed that successfully tackle practical problems such as the low scattering efficiency of particles, the inferior depth ...
Klaus D Hinsch, Sven F Herrmann
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