منابع مشابه
Digital Holographic Piv for 3d Flow Measurement
We have developed a simple digital holographic PIV system for 3D measurement of turbulent and multiphase flow. This system records in-line holograms of tracer particles directly on a digital camera and reconstructs the 3D particle field numerically. Using a novel complex amplitude-based method, we are able to overcome the depth of focus problem and the speckle noise problem associated with the ...
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In recent years, 3D Particle Imaging Velocimetry (PIV) has become more and more attractive due to its ability to fully characterize various fluid flows. However, 3D fluid capture and velocity field reconstruction remain a challenging problem. A recent rainbow PIV system encodes depth into color and successfully recovers 3D particle trajectories, but it also suffers from a limited and fixed volu...
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As endothelial cells are subject to flow shear stress. it is important to determine the detailed velocity distribution in microvessels in the study of mechanical interactions between blood and endothelium. Recently. particle image velocimetry (PIV) has been proposed as a quantitative method of measuring velocity fields instantaneously in experimental fluid mechanics. The authors have developed....
متن کاملDigital In-line Holographic PIV for 3D Flow Measurement
We present the design and implementation of a digital in-line holographic PIV system for 3D flow measurements. This system records in-line holograms of tracer particles directly on a CCD camera and numerically reconstructs the holograms. The 3D position of particles is extracted from the reconstructed particle images, and velocity field is then obtained using an advanced particle tracking algor...
متن کاملDirect measurement of fluid velocity gradients at a wall by PIV image processing with stereo reconstruction
Velocity gradient is typically estimated in Particle Image Velocimetry (PIV) by differentiating a measured velocity field, which amplifies noise in the measured velocities. If gradients near a boundary are sought, such noise is usually greater than in bulk fluid, because of small tracer displacement, uncertainty in the effective positions of velocity vectors, intense deformation of tracer patte...
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ژورنال
عنوان ژورنال: Journal of the Visualization Society of Japan
سال: 2015
ISSN: 0916-4731,1884-037X
DOI: 10.3154/jvs.35.139_19