Digital particle image velocimetry
Stereo digital particle image velocimetry investigation of a free surface mixing layer
... Stereoscopic Digital Particle Image Velocimetry (SDPIV) was implemented to obtain instantaneous three-component velocity measurements within planar slices of the steady-state, spatially ...
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Application of Digital Particle Image Velocimetry in the Analysis of Scale Effects in Granular Soil
... Abstract— The available studies in the literature which dealt with the scale effects of strip footings on different sand packing systematically still remain scarce. In this research, the variation of ultimate bearing ...
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On the Development of Defocusing Digital Particle Image Velocimetry with Full Characterization
... Once the origin is identified the average distance to the four closest points is used as the final spacing estimate. The perfect grid will have its dots spaced by this number averaged over all the apertures for a given ...
287
The influence of wing–wake interactions on the production of aerodynamic forces in flapping flight
... two-dimensional digital particle image velocimetry (DPIV) to visualize flow patterns around the flapping wing of a dynamically scaled robot for a series of reciprocating strokes starting from ...
16
When vortices stick: an aerodynamic transition in tiny insect flight
... One unsteady mechanism that has been suggested as a means to provide additional lift during insect flight is delayed stall. Essentially, a large leading edge vortex (LEV) is formed at the beginning of each half stroke ...
16
Displacement Fields in Footing-Sand Interactions under Cyclic Loading
... the digital particle image velocimetry (DPIV), local scale displacement fields of a dense sand medium interacting with a rigid footing are measured under the plane-strain condition for two ...
5
Aerodynamics of the flying snake Chrysopelea paradisi: how a bluff body cross sectional shape contributes to gliding performance
... (TR) digital particle image velocimetry (DPIV) were used to determine lift and drag coefficients, wake dynamics and vortex- shedding characteristics of the shape across a behaviorally relevant ...
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A wake based correlate of swimming performance and foraging behavior in seven co occurring jellyfish species
... Jellyfish provide a unique perspective on the evolution of propulsion by aquatic animals. Medusae were the earliest metazoans to achieve muscle-powered locomotion in water and they did so with a remarkably restricted ...
9
Hydrodynamics of pulsed jetting in juvenile and adult brief squid Lolliguncula brevis: evidence of multiple jet `modes' and their implications for propulsive efficiency
... using digital particle image velocimetry (DPIV). A range of jet structures were observed but most structures could be classified as variations of two principal jet modes: (1) jet mode I, where ...
15
Flow structures and fluid transport for the hydromedusae Sarsia tubulosa and Aequorea victoria
... of particle motion in the resulting ...from digital particle image velocimetry (DPIV), or similar, results in higher resolution of the LCS as well as greater accuracy in subsequent ...
12
The Effect of Material Property on Flow in Oscillatory Baffled Columns
... [4] Fitch, A.W.J., Hongbing,Ni, Xiongwei, An investigation of the effect of viscosity on mixing in an oscillatory baffled column using digital particle image velocimetry and computationa[r] ...
5
Hydrodynamic fin function of brief squid, Lolliguncula brevis
... of digital particle image velocimetry (DPIV) (Willert and Gharib, 1991) allows for the flow quantification and visualization of vortices around a swimming organism, and has been used in ...
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Pulsed jet dynamics of squid hatchlings at intermediate Reynolds numbers
... Despite the potential relationships among vortex ring formation, impulse and stroke ratio during pulsed jetting at intermediate Re, little is known about jet flows produced by squid hatchlings. Specifically, do ...
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Quantification of the wake of rainbow trout (Oncorhynchus mykiss) using three dimensional stereoscopic digital particle image velocimetry
... images. Image alignment and distortion are corrected using polynomial equation mapping functions created using a least-squares method and the calibration grid ...
9
An addendum for particle image velocimetry in centrifuge modelling
... targets. Particle Image Velocimetry (PIV) also known as Digital Image Correlation (DIC) uses im- age pixel intensity values to infer incremental dis- placements and strain ...
7
A Review of Particle Image Velocimetry for Fish Migration
... each particle due to the high con- centration of particles used and overlaps between particles in captured ...Therefore, image evaluation me- thods are necessary to derive the displacement information from ...
19
Applied the Large Scale Particle Image Velocimetry Technique for Measurement the Velocity of Gravity Currents in the Laboratory
... on Particle Image Velocimetry for large scale applica- ...optical velocimetry technique uses conventional the digital imaging methods for the quantitative de- termination of ...
8
Quantitative digital image processing in fringe analysis and particle image velocimetry (PIV)
... The theory of linear filters is well understood [11], However, the proper ties of these filters can be inferior to a wider class which, although defying detailed theoretical analysis, can give superior results in some ...
525
Three dimensional flow structures and evolution of the leading edge vortices on a flapping wing
... multi-slice digital stereoscopic particle image velocimetry (DSPIV) to measure the target flow fields at three typical stroke phases: at ...
10
Velocity Measurement by PIV Using W Shaped Scanning Light Sheet
... This study proposes a three-dimensional (3D) particle image velocimetry (PIV) method using W- shaped light sheet and color PIV with a digital SLR camera. The uncertainty of the velocity mea- ...
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