FLOW VISUALIZATION USING PHOTOCHROMIC DYES - A REVIEW

This paper reviews the evolution of a flow visualization technique cal led the photochronic dye method. This technique uses a photochromic dy e in solution. The dye is activated along narrow lines by passing shar ply focused UV light through the solution. The movement of the dye tra ces are recorded, and velocities are determined from the resulting pic tures. The use of various dyes in fluid flow experiments is discussed, and a tabulated summary of the application of the technique to variou s flows is presented.