Particle dynamics analysis

found: Work cat: VanDerWege, B.A. Effects of fuel volatility and operating conditions on fuel sprays in DISI engines, 2000:abstr. (Optimal design of modern direct injection spark-ignition engines depends heavily on the characteristics and distribution of the fuel spray. This study was designed to compliment imaging experiments of changes in the spray structure due to fuel volatility and operating conditions. Use of phase-Doppler particle analysis (PDPA) allows quantitative point measurements of droplet diameter and velocity)

found: Optical measurements, 2001:p. 139 (Phase Doppler Anemometry (PDA), also known as Particle Dynamics Analysis (PDA), Phase Doppler Particle Analysis (PDPA), Phase Doppler Difference Method (PDDM) and Phase Doppler Interferometry (PDI), is a laser optical instrument for simultaneous measurement of the velocity and size of spherical particles. Additionally it can be used for concentration and mass flux measurements. PDA enables measurements of high accuracy and a very high spatial resolution. Since it is based on an absolute physical effect, PDA does not require any calibration. The principle of velocity measurement is the same as that used in Laser Doppler Velocimetry ... . The velocity is determined by analyzing the frequency shift of light which is scattered by a particle flowing through the interference volume of at least two intersecting laser beams. For particle size measurements PDA makes use of the fact that scattered light which is received from two different directions of observation has a phase difference, which is proportional to the diameter of the particle)

found: Tavoularis, S. Measurement in fluid mechanics, 2005:p. 320 (Among the variety of available optical methods, of particular interest is phase Doppler analysis (PDPA or PDA), also known as phase Doppler interferometry (PDI), because it can be combined with LDV [laser Doppler velocimetry] ... to provide simultaneous measurements of low velocity and size distribution of droplets or other spherical particles)

found: Combustion science and technology, 1990:v. 74, no. 1-6, p. 343 (Application of laser interferometry to the study of droplet/gas phase interaction and behavior in liquid spray combustion systems ... The application or optical scattering techniques is described for the measurement of droplet properties in liquid sprays. Of the various approaches, phase Doppler interferometry demonstrates the highest promise for obtaining the information necessary ... . The technique deduces drop size from the spatial variation in the imaged fringe pattern due to drop radius of curvature. Combined with the measurement of velocity via laser anemometry, the capability of sizing allows for the determination of continuous phase velocities as well as droplet size and velocity correlations)

found: Google search, May 31, 2014 (Particle dynamics analysis -- 841,000 hits; Phase Doppler particle analysis -- 99,100 hits; Phase Doppler anemometry -- 16,300 hits; Phase Doppler difference method -- 6,130 hits; Phase Doppler interferometry -- 3,270 hits)