HISTORY OF DEVELOPMENT OF THE PHASE-DOPPLER PARTICLE-SIZING VELOCIMETER

The ability to routinely make simultaneous measurements of the size an d velocity of individual spherical particles is identified as a crucia l component of advances in the science and technology of multiphase sy stems and processes. Since it is the dual beam interferometer identifi ed here as the phase-Doppler particle-sizing velocimeter (PD) that has provided this capability, and since 1995 marks twenty years from a se minal paper by Durst and Zare, a historical review is warranted and is presented. The roots and context of the development of PD are traced from the days of laser Doppler velocimetry (LDV) in the early 1970's t hrough work culminating at several laboratories in the mid 1980's. A n umber of important contributions and the engineers and scientists resp onsible for those contributions are recognized.