Results 31 to 40 of about 252,611 (302)

Adaptive particle image velocimetry based on sharpness metrics

open access: yesJournal 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
doaj   +1 more source

Particle image velocimetry - Classical operating rules from today’s perspective

open access: yes, 2020
Over the last four decades, particle image velocimetry (PIV) has evolved into a powerful and significant measurement technique. The technique has been applied to many areas of fluid mechanics and the accuracy and resolution has been greatly improved over
S. Scharnowski, C. Kähler
semanticscholar   +1 more source

Study on visualization of water mixing flows in a digester equipped with a vertical impeller by using radiotracers

open access: yesNuclear Engineering and Technology, 2020
A mixer with a new concept design has been adapted into water treatment plants. It reportedly cuts down the energy consumption of the mixer by the new mixer, which moves vertically and creates internal flows toward its bottom.
Sung-Hee Jung   +3 more
doaj   +1 more source

PIVlab – Towards User-friendly, Affordable and Accurate Digital Particle Image Velocimetry in MATLAB

open access: yes, 2014
Digital particle image velocimetry (DPIV) is a non-intrusive analysis technique that is very popular for mapping flows quantitatively. To get accurate results, in particular in complex flow fields, a number of challenges have to be faced and solved: The ...
W. Thielicke, E. Stamhuis
semanticscholar   +1 more source

4-D Echo-Particle Image Velocimetry in a Left Ventricular Phantom.

open access: yesUltrasound in Medicine and Biology, 2020
Left ventricular (LV) blood flow is an inherently complex time-varying 3-D phenomenon, where 2-D quantification often ignores the effect of out-of-plane motion.
J. Voorneveld   +11 more
semanticscholar   +1 more source

Feasibility of Optical Flow Field Measurements of the Coolant in a Grinding Machine

open access: yesApplied 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
doaj   +1 more source

Performance prediction of point-based three-dimensional volumetric measurement systems [PDF]

open access: yes, 2008
Point-based three-dimensional volumetric measurement systems are defined as multi-view vision systems which reconstruct a three-dimensional scene by first identifying key points on the views and then performing the reconstruction.
Gharib, M., Graff, E. C.
core   +1 more source

Uncertainty assessment for a towed underwater stereo PIV system by uniform flow measurement

open access: yesInternational Journal of Naval Architecture and Ocean Engineering, 2018
The present study aims to assess test uncertainty assessment method of nominal wake field measurement by a Stereoscopic Particle Image Velocimetry (SPIV) system in a towing tank.
Bum Woo Han   +4 more
doaj   +1 more source

Particle image velocimetry studies of bubble growth and detachment by high speed photography [PDF]

open access: yes, 1997
An understanding of bubble flows is important in the design of process equipment, particularly in the chemical and power industries. In vapour-liquid processes the mass and heat transfer between the phases is dominated by the liquid-vapour interface and ...
Dempster, William   +3 more
core   +1 more source

Metrics for the Quantification of Seeding Characteristics to Enhance Image Velocimetry Performance in Rivers

open access: yesRemote 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
doaj   +1 more source

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