With an idea of elucidating a physical phenomenon from visual observation, devices to enable to observe and survey directly a large portion of a flow field, in general, have been called as the flow visualization techniques. They allowed us to facilitate the understanding of the basis of theoretical analysis for various flow problems. Relying upon the results of the symposia on flow visualization in Tokyo,i.e. the annual domestic meetings since 1973 and the first international conference last year, I would like to present a survey of recent development and improvement for each of the flow visualization techniques along with the typical applications and the latest tendencies.
"Recent Flow Visualization Studies", Proc. SPIE 0189, 13th Intl Congress on High Speed Photography and Photonics, (27 July 1979); doi: 10.1117/12.957545; https://doi.org/10.1117/12.957545