A STUDY OF VELOCITY VECTOR PROFILE AND STRAIN RATE DISTRIBUTION FOR LAMINAR AND OSCILLATORY FLOWS IN A BAFFLED TUBE USING PARTICLE IMAGE VELOCIMETRY

1995 ◽  
Vol 2 (2) ◽  
pp. 135-147 ◽  
Author(s):  
X. Ni ◽  
S. Liu ◽  
M. J. Joyce ◽  
P. S. Grewal ◽  
C. A. Greated
Keyword(s):  
Particle Image Velocimetry ◽  
Strain Rate ◽  
Velocity Vector ◽  
Particle Image ◽  
Oscillatory Flows ◽  
Rate Distribution ◽  
Image Velocimetry ◽  
Strain Rate Distribution

Measurement and Characterization the Flocculation Processes by PIV

2013 ◽  
Vol 456 ◽  
pp. 644-647
Author(s):  
Jun Feng Gao
Keyword(s):  
Particle Image Velocimetry ◽  
Velocity Field ◽  
Velocity Vector ◽  
Field Data ◽  
Particle Image ◽  
Morphological Changes ◽  
In Situ Observation ◽  
Image Velocimetry ◽  
Flocculation Process

Particle image velocimetry (PIV) was applied to characterize the morphological changes of flocs and to acquired velocity field data in the flocculation process in Taylor-Couette reactor. By use of PIV the morphological of the flocs with ferric trichloride (FeCl3) could be characterized and described with good performance, the velocity vector also could be measurement. It was shown that the flocculation efficiencies reached the maximum values and the size of the generated flocs was the biggest when the roating speed was in the range between 20~60 rpm. It was demonstrated that PIV can be exploited as a useful tool in the in-situ observation the flocculation processes. Keywords: flocs morphology; flocculation efficiencies; velocity vector; PIV

On the measurement of strain rate in an oscillatory baffled column using particle image velocimetry

2000 ◽  
Vol 55 (16) ◽  
pp. 3195-3208 ◽  
Author(s):  
X Ni ◽  
J.A Cosgrove ◽  
A.D Arnott ◽  
C.A Greated ◽  
R.H Cumming
Keyword(s):  
Particle Image Velocimetry ◽  
Strain Rate ◽  
Particle Image ◽  
Image Velocimetry

Instantaneous Planar Measurements of Velocity and Large-Scale Vorticity and Strain Rate in an Engine Using Particle-Image Velocimetry

1989 ◽  
Author(s):  
David L. Reuss ◽  
Ronald J. Adrian ◽  
Christopher C. Landreth ◽  
Donald T. French ◽  
Todd D. Fansler
Keyword(s):  
Particle Image Velocimetry ◽  
Strain Rate ◽  
Large Scale ◽  
Particle Image ◽  
Image Velocimetry

scholarly journals Three-Dimensional Reconstruction of Evaporation-Induced Instabilities Using Volumetric Scanning Particle Image Velocimetry

Optics ◽  
2020 ◽  
Vol 1 (1) ◽  
pp. 52-70
Author(s):  
Mohammad Amin Kazemi ◽  
Janet A. W. Elliott ◽  
David S. Nobes
Keyword(s):  
Particle Image Velocimetry ◽  
Velocity Vector ◽  
Vector Fields ◽  
Particle Image ◽  
Laser Sheet ◽  
Three Dimensional ◽  
Maximum Velocity ◽  
Liquid Volume ◽  
Image Velocimetry ◽  
Out Of Plane

The three-dimensional (3D) flow below the interface of an evaporating liquid at a low pressure is visualized and quantified using scanning particle image velocimetry. The technique presented highlights the use of a single camera and a relatively fast moving laser sheet to image the flow for an application where using more than one camera is difficult. The technique allows collection of the full three-dimensional velocity vector map over the whole liquid volume. The out-of-plane component of the velocity has been determined using two different processing approaches: (i) deriving the full vector from a 3D cross-correlation of the particle volumes and (ii) applying the continuity equation to determine out-of-plane velocities from the calculated in-plane velocity vector fields. The results obtained from both methods showed good agreement with each other. The 3D velocity field reveals the existence of a torus shaped vortex below the evaporating meniscus that was induced by the exposure of the cold liquid to the warmer solid walls. The velocity data also shows that the maximum velocity occurs below the interface, not at the interface which highlights that the observed vortex is not driven by thermocapillary forces that usually govern the flow during evaporation at smaller scales.

Velocity, Vorticity, and Strain-Rate Ahead of a Flame Measured in an Engine Using Particle Image Velocimetry

1990 ◽  
Author(s):  
David L. Reuss ◽  
Mark Bardsley ◽  
Philip G. Felton ◽  
Christopher C. Landreth ◽  
Ronald J. Adrian
Keyword(s):  
Particle Image Velocimetry ◽  
Strain Rate ◽  
Particle Image ◽  
Image Velocimetry

Effect of Piston Shape on Scavenging in a Two-Stroke Engine - A CFD Analysis

2014 ◽  
Vol 592-594 ◽  
pp. 1515-1519 ◽  
Author(s):  
Vivek Agrawal ◽  
J.M. Mallikarjuna
Keyword(s):  
Particle Image Velocimetry ◽  
Velocity Vector ◽  
Particle Image ◽  
Flow Characteristics ◽  
Cfd Analysis ◽  
Commercial Code ◽  
Image Velocimetry ◽  
Experimental Values ◽  
Cylinder Flow ◽  
Stroke Engine

This study focuses on effect of piston shape on in-cylinder flows in a conventional loop scavenged two-stroke engine using CFD. Three piston-shapes viz., flat, flat with center-bowl and flat with center-dome are analyzed along with standard piston. The CFD solution has been obtained by using commercial code STAR-CD. First the CFD results are compared with those of experimental values obtained from particle image velocimetry (PIV). For comparison among various piston shapes, various parameters viz., velocity vector plots, tumble ratio (TR), turbulent kinetic energy (TKE) at various crank angles are used. Scavenging and trapping efficiencies are also calculated for each piston configuration. From the results, it is found that flat with center-bowl piston is the best in terms of in-cylinder flow characteristics. It gives higher TR and TKE with very little effect on efficiencies.

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