Spectroscopic Visualization of Vortex Flows Using Dye-Containing Nanofibers

摘要

A vortex is a recognized example of macroscopic chiralityand one possible origin of chiral symmetry-breaking in nature.Compared with,for example,rheometric shear flows,vortices are complex,involving many locally different fluidic flows.Upon mechanical rotary stirring of a fluid in a cuvette,a tight,torsional flow is generated at the rotary center,while the peripheral part of the vortex involves a loose,spiral flow(Figure 1b,left).This intriguing situation prompted us to investigate whether or not vortex flows can be rendered spectroscopically.