scholarly journals Experimental study of liquid velocity profiles in large-scale bubble columns with particle tracking velocimetry

2019 ◽  
Vol 1224 ◽  
pp. 012036 ◽  
Author(s):  
G Besagni ◽  
F Inzoli ◽  
T Zieghenein ◽  
D Lucas
Keyword(s):  
Experimental Study ◽  
Particle Tracking ◽  
Particle Tracking Velocimetry ◽  
Large Scale ◽  
Liquid Velocity ◽  
Velocity Profiles ◽  
Bubble Columns

scholarly journals Experimental study of aortic flow in the ascending aorta via Particle Tracking Velocimetry

2012 ◽  
Vol 53 (5) ◽  
pp. 1469-1485 ◽  
Author(s):  
Utku Gülan ◽  
Beat Lüthi ◽  
Markus Holzner ◽  
Alex Liberzon ◽  
Arkady Tsinober ◽  
...  
Keyword(s):  
Experimental Study ◽  
Particle Tracking ◽  
Particle Tracking Velocimetry ◽  
Ascending Aorta ◽  
Aortic Flow

An Experimental Study and Analysis of Turbulent Film Tilted Pad Bearings

1974 ◽  
Vol 96 (1) ◽  
pp. 168-173 ◽  
Author(s):  
R. A. Burton ◽  
H. J. Carper ◽  
Y. C. Hsu
Keyword(s):  
Experimental Study ◽  
Turbulent Flow ◽  
Large Scale ◽  
Velocity Profiles ◽  
Working Fluid ◽  
Pressure Distributions ◽  
Aspect Ratios

Velocity profiles and pressure distributions are reported for turbulent flow under tilted pads in a large scale bearing model (6-ft shaft size, with air as the working fluid). Results are extended analytically to other bearing sizes and aspect ratios.

scholarly journals Experimental study of the surface oscillations induced by a shallow flow past a lateral cavity

2018 ◽  
Vol 40 ◽  
pp. 05033 ◽  
Author(s):  
L. Engelen ◽  
S. Creëlle ◽  
L. Schindfessel ◽  
T. De Mulder
Keyword(s):  
Experimental Study ◽  
Particle Tracking ◽  
Particle Tracking Velocimetry ◽  
Measurement Techniques ◽  
Three Dimensional ◽  
Surface Shape ◽  
Main Stream ◽  
Pressure Measurements ◽  
Lateral Cavity ◽  
Flow Configurations

The present work presents an experimental study in which resonant surface oscillations inside a lateral cavity are reconstructed, often denoted as se- iching, which are excited by a shallow main stream flowing past the horizontal basin. Firstly, the flow configurations that trigger transverse and/or longitu- dinal seiching are studied using pressure measurements in the corners of the cavity, which shows that a transitional Froude number exists, approximately 0.63, at which the dominant seiching mode changes from transverse to longi- tudinal seiching. For both types of resonant conditions, the surface shape is analyzed in detail using a three-dimensional particle tracking velocimetry (3D- PTV) setup. Based upon floating seeding particles, the 3D surface is recon- structed with a superior spatial resolution compared to traditional measurement techniques, which confirms the multimodal aspect of the surface oscillations.

X-ray Based Particle Tracking Velocimetry for Bubble Columns with High Void Fraction

2004 ◽  
pp. 129-138 ◽  
Author(s):  
A. Seeger ◽  
U. Kertzscher ◽  
K. Affeld ◽  
L. Goubergrits ◽  
E. Wellnhofer
Keyword(s):  
Void Fraction ◽  
Particle Tracking ◽  
Particle Tracking Velocimetry ◽  
Bubble Columns ◽  
X Ray

scholarly journals Computer Vision Aided Structural Identification: Feature Tracking Using Particle Tracking Velocimetry versus Optical Flow

Proceedings ◽  
2018 ◽  
Vol 4 (1) ◽  
pp. 33 ◽  
Author(s):  
Yunus Emre Harmanci ◽  
Zhilu Lai ◽  
Utku Gülan ◽  
Markus Holzner ◽  
Eleni Chatzi
Keyword(s):  
Computer Vision ◽  
Optical Flow ◽  
Particle Tracking ◽  
Particle Tracking Velocimetry ◽  
Large Scale ◽  
Video Recording ◽  
Structural Features ◽  
Spatial Density ◽  
Motion Magnification ◽  
Shear Frame

Recent advances in computer vision techniques allow to obtain information on the dynamic behaviour of structures using commercial grade video recording devices. The advantage of such schemes lies in the non-invasive nature of video recording and the ability to extract information at a high spatial density utilizing structural features. This creates an advantage over conventional contact sensors since constraints such as cabling and maximum channel availability are alleviated. In this study, two such schemes are explored, namely Particle Tracking Velocimetry (PTV) and the optical flow algorithm. Both are validated against conventional sensors for a lab-scale shear frame and compared. In cases of imperceptible motion, the recently proposed Phase-based Motion Magnification (PBMM) technique is employed to obtain modal information within frequency bands of interest and further used for modal analysis. The optical flow scheme combined with (PBMM) is further tested on a large-scale post-tensioned concrete beam and validated against conventional measurements, as a transition from lab- to outdoor field applications.

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