[PDF] Top 20 Multiple-plane particle image velocimetry using a light-field camera

... the camera are mounted on a rail allowing on-axis shifting relatively to the flow ...The field lens is a singlet lens with f=50mm, ...and field lens is 90mm, between field lens and lens array ... See full document

... of light energy reaching the particles. In the case of a laser light sheet penetrating a dense medium in a parallel manner, the beam will lose energy and will produce an uneven illumination of the ... See full document

... called Particle Image Velocimetry (PIV) in experimental Fluid Mechanics, a fluid flow is typically seeded randomly with micron-size glass particles (in water) or oil droplets (in ...illuminated ... See full document

... velocity) using Instron loading machine with ...D5500 camera that offers a high definition (24 Mega Pixels) for more accurate kinematic measurements was fixed in front of the box, and two light ... See full document

... CCD camera (1280 u 1024 px 2 , 12 bit) with 28 mm f/2.8 lens. The image magnification is about 1:4 (M = 54 P ...with particle diameters between 0.2 and 0.3 P m. The particle image ... See full document

... imaging velocimetry [17] is an image-based measurement technique that is used for fluid flow measure- ...a light-sheet illumination is generated, producing a homogenous light plane ... See full document

... the camera angles were minimized to allow the entire image to be in focus across the laser ...each camera was angled 15° from the perpendicular to the light sheet and was 7” from the center ... See full document

... laser light sheets were adjusted on the same ...high-speed camera used in the experiment was a Photron ...The particle size was- several 10 µm or ... See full document

... performed using a technique outlined in Willert and Gharib (1991); rather than matching individual particles between exposures, the overall light intensity patterns within each sub-window are compared for ... See full document

... green light sheet with a 532 nm wavelength. The light sheet optics is placed at the end of the articulated delivery arm that can be placed at any angle to produce the thin light ...adjust ... See full document

... view. Multiple cameras are synchronized spatially through a calibration [Tsai, 1987] which also builds a mathematical pinhole model for each camera containing some distortion correction parame- ...the ... See full document

... CCD camera (1280 × 1024 pixels with 12 bits), Nd:YAG lasers (50 mJ/pulse with 30 pulses/sec) and a pulse ...velocity field in a short time difference, which results in the evaluation of time derivative of ... See full document

... flow field around a bubble from growth to ...flow field is never stationary and there always exists turbulence, both small scale and large scale, from the preceding ...flow field is unable to model ... See full document

... polarised light sheet and illuminates the flow field over the nucleation site, which is situated in the central point of the boiling ...Device) camera (21) with the PSI (Progressive Scan Interline) ... See full document

... the field of stochastic estimation, which relate to the performance that can be expected in practical situations, when the stochastic estimation model is built from a finite number of ...G, using ... See full document

... illuminated plane but long enough to make the particle images ...subsequent image frame pair is the repetition rate of the system (in this case set to ...The camera system requires a minimum ... See full document

... time-resolved Particle Image Velocimetry (TR PIV) consisted of diode pumped Nd:YLF laser (10 mJ in a pulse), one camera with resolution 1280 x 800 pixels, interrogation area size 32 x 32 ... See full document

... method using waterjet has a disadvantage of relatively simple structure compared to other mechanical excavation methods, but it is difficult to predict the desired excavation ...method using waterjet has a ... See full document

... all image pairs were recorded when the seed was aligned perpendicular to the laser ...illuminated plane by the laser sheet and the location of the seed when the pulse generator triggers synchronized ... See full document

... Verification of 3-D Stereoscopic PIV Procedures. As depicted in Table 3 and 4, the range of velocity obtained using PIV is 2.31 – 2.91 m/s, whereas using probe and calculated theoretically they are 2.31 – ... See full document