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Particle image velocimetry (PIV) is a non-intrusive optical flow measurement technique used to study fluid flow patterns and velocities. PIV has found widespread applications in various fields of science and engineering, including aerodynamics, combustion, oceanography, and biofluids.
Joseph Katz [1] is an Israel-born American fluid dynamicist, known for his work on experimental fluid mechanics, cavitation phenomena and multiphase flow, turbulence, turbomachinery flows and oceanography flows, flow-induced vibrations and noise, and development of optical flow diagnostics techniques, including Particle Image Velocimetry (PIV) and Holographic Particle Image Velocimetry (HPIV).
His areas of research include Micro-and Nanofluidics, Particle Image Velocimetry, Opto-microfluidics and bio-MEMS. He is the co-inventor of micro-PIV. He is the co-inventor of micro-PIV. [ 3 ]
A method for automatic estimation of instantaneous local uncertainty in particle image velocimetry measurements. Experiments in fluids, 53(4), 1133-1147. Charonko, J. J., & Vlachos, P. P. (2013). Estimation of uncertainty bounds for individual particle image velocimetry measurements from cross-correlation peak ratio.
A classic example of the distinction is particle tracking velocimetry, where the idea is to find the velocity of individual flow tracer particles (Lagrangian) and particle image velocimetry, where the objective is to find the average velocity within a sub-region of the field of view (Eulerian). [1]
The 3-D particle tracking velocimetry (PTV) belongs to the class of whole-field velocimetry techniques used in the study of turbulent flows, allowing the determination of instantaneous velocity and vorticity distributions over two or three spatial dimensions. 3-D PTV yields a time series of instantaneous 3-component velocity vectors in the form of fluid element trajectories.
3-D Laser Doppler Velocimetry System. Present system is 2-D; High-speed/High-resolution 3-D Particle Image Velocimetry system; Up to 1 kHz frame rate (present system is capable 2–3 Hz standard or 15 Hz up to limit of RAM) 4.2 MP resolution (present system is 1.92 MP resolution) Planar laser induced fluorescence (PILF) system [4]
To further in situ digital particle image velocimetry measurements of propulsion in aquatic animals, Dabiri and his student K. Katija designed and patented a device which very accurately takes measurements that are computed into the kinetic energy due to swimming.