Hydrodynamic Flow Visualization

SUMMARY The principal methods of visualizing flows, applicable in studies of liquids and, by hydraulic analogy, of gases. are surveyed in this paper. First a short outline is given of the characteristics and uses of a number of installations, especially those used by ONERA (France). Then some results are given showing the great variety of topics that can be studied, extending from fundamental fluid mechanics to ap­ plications in the fields of hydraulics, aerospace, and industry.