Weight coefficient calculation through equivalent ray tracing method for light field particle image velocimetry

Holography and particle image velocimetry

The contribution of holographic techniques to particle velocity measurements is discussed. Two-dimensional holographic particle image velocimetry and three-dimensional holographic velocimetry are described and compared. Their advantages and limits are discussed and the latest progress in this domain is presented, together with perspectives for the near future.

Advanced Algorithms for Microscale Particle Image Velocimetry

The recent explosive increase in the use of  uidic microelectromechanical systems (MEMS) has subsequently driven the development of  uidic measurement techniques capable of measuring velocities at length scales small enough to be of use in characterizing and optimizing these new devices. Recently, several techniques have demonstrated spatial resolutions smaller than 1001mbut larger than 101m....

A genetic algorithm particle pairing technique for 3D velocity field extraction in holographic particle image velocimetry

This research explores a novel technique, using Genetic Algorithm Particle Pairing (GAPP) to extract threedimensional (3D) velocity fields of complex flows. It is motivated by Holographic Particle Image Velocimetry (HPIV), in which intrinsic speckle noise hinders the achievement of high particle density required for conventional correlation methods in extracting 3D velocity fields, especially i...

Field Estimation through Ray-Tracing for Microwave Links

Light ray tracing through a leaf cross section.

A light ray, incident at about 5 degrees to the normal, is geometrically plotted through the drawing of the cross section of a soybean leaf using Fresnel's equations and Snell's law. The optical mediums of the leaf considered for ray tracing are air, cell sap, chloroplast, and cell wall. The above ray is also drawn through the same leaf cross section considering cell wall and air as the only op...