Results 21 to 30 of about 3,041 (178)

Volumetric particle tracking velocimetry (PTV) uncertainty quantification [PDF]

Experiments in Fluids, 2020
We introduce the first comprehensive approach to determine the uncertainty in volumetric Particle Tracking Velocimetry (PTV) measurements. Volumetric PTV is a state-of-the-art non-invasive flow measurement technique, which measures the velocity field by recording successive snapshots of the tracer particle motion using a multi-camera set-up.
Sayantan Bhattacharya, Pavlos P. Vlachos
openaire   +2 more sources

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, Weitbrecht Volker, Li Danxun, Detert Martin   +3 more
doaj   +1 more source

River Velocity through LSPTV Technique using UAVs

Revista Ingenierías Universidad de Medellín, 2022
This paper presented the analysis of the difference between two techniques for the measurement of the velocity of water flows using the non-intrusive large-scale particle tracking velocimetry technique (LS PTV) and various intrusive techniques like ...
Jorge Andrés Rosero Legarda, Angela Nathalia Argoti Santacruz, Francisco Ricardo Mafla Chamorro   +2 more
doaj   +1 more source

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

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, Alonso Pizarro, Salvatore Manfreda   +2 more
doaj   +1 more source

Revisiting the NASA surface tension driven convection experiments

npj Microgravity, 2022
Marangoni effect plays an important role in many industrial applications where a surface tension gradient induces fluid flow, e.g., the cleaning process of silicon wafers and the welding process of melted metal.
Yohan Sequeira, Abhradeep Maitra, Anupam Pandey, Sunghwan Jung   +3 more
doaj   +1 more source

HoloTrack: in-situ holographic particle tracking velocimetry of cloud droplets [PDF]

Atmospheric Measurement Techniques
We present HoloTrack, a novel, fully autonomous measurement system designed to capture three-dimensional (3D) cloud droplet data and provide detailed insights into droplet dynamics, their spatial distribution and velocity.
B. Thiede, B. Thiede, F. Nordsiek, Y. Kim, E. Bodenschatz, E. Bodenschatz, E. Bodenschatz, G. Bagheri   +7 more
doaj   +1 more source

Improvement in the Number of Velocity Vector Acquisitions Using an In-Picture Tracking Method for 3D3C Rainbow Particle Tracking Velocimetry

Fluids
Particle image velocimetry and particle tracking velocimetry (PTV) have developed from two-dimensional two-component (2D2C) velocity vector measurements to 3D3C measurements.
Mao Takeyama, Kota Fujiwara, Yasuo Hattori   +2 more
doaj   +1 more source

New Algorithms in Particle Tracking Velocimetry

Journal of the Visualization Society of Japan, 1999
New algorithms have been implemented and tested for the use in particle tracking velocimetry (PTV). These new algorithms have been introduced mainly in the part of particle tracking itself, but as well as in the preceding part of individual particles extraction.
Ohmi, Kazuo, Li, Hang Yu
openaire   +2 more sources

Particle image reconstruction for particle detection in particle tracking velocimetry [PDF]

Measurement Science and Technology, 2018
Abstract A new methodology for particle identification and localization in the context of particle tracking velocimetry (PTV) is presented. The aim is to overcome the issue of inherent detection errors under high particle density conditions.
Adam Cheminet, Jean-François Krawczynski, Philippe Druault   +2 more
openaire   +1 more source

X-Ray imaging method for in-situ study of particle-laden flows

e-Journal of Nondestructive Testing
 The accurate measurement of flow parameters often depends on sensor accessibility. Optical flow assessment techniques, such as Particle Image Velocimetry (PIV) and Particle Tracking Velocimetry (PTV), are limited to optically transparent media. However,
Julian Kattinger, Phi-Long Chung, Mike Kornely, Julian Ehrler, Marc Kreutzbruck, Christian Bonten   +5 more
doaj   +1 more source