Flow Tagging Velocimetry Using Caged Dye Photo-Activated Fluorophores.

摘要

The use of caged dye photo-activated fluorophore velocimetry is described and representative examples are presented. After a brief survey of recently reported measurements, a more detailed example of the flow produced in a cylinder with a single rotating end wall is presented. Simultaneous stereoscopic image sets in the (r, z) and (r, Theta) planes have been obtained over a Reynolds number range of roughly 10(exp 2)-10(exp 5). At low Reynolds numbers (congruent 0-2000), the steady, axisymmetrical flow is found to quantitatively agree with predictions from a numerical flow solver. At higher Reynolds numbers (from 5 x 10(exp 3) to 10(exp 5)), the flow develops considerable turbulent three-dimensional structure.