RECAP AND FUTURE DIRECTIONS

To summarize, the field of single-point measurements continues to undergo rapid developments in all of its aspects and applications and will undoubtly continue to play an important role in the study of dispersed two-phase flow. Such developments are presented at regular conferences, such as the International Symposium on Application of Laser Techniques to Fluid Mechanics (Lisbon) and the Conference on Optical Particle Sizing. Moreover, international journals, such as Measurement Science and Technology, Particle and Particle Systems Characterization, and Experiments in Fluids are devoted to recent developments in measurement techniques for two-phase flows. 

Adrian, R.J. and Yao, C.S., Power spectra of fluid velocities measured by laser Doppler velocimetry. Exper. in Fluids, 5, 17-28 (1987) 

Agrawal, Y., Quadrature demodulation in laser Doppler velocimetry. Applied Optics, 23, 1685-1686 (1984) 

Grehan, G., Onofri, F. and Xu, T.H., PDA-system without Gaussian beam defects. 3rd Conference on Optical Particle Sizing, Yokohama, Japan, 461-470 (1993) 

Albrecht, H.-E., Borys, M. and Hubner, K., Generalized Theory for the simultaneous measurement of particle size and velocity using laser Doppler and lase two-focus methods. Part. Part.. Syst. Charact. 10, 138-145 (1993) 

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