抄録
Mixing and diffusion characteristics of an axisymmetric water jet were investigated by a flow visualization technique. A laser florescent dye and a laser light sheet were used to visualize the water jet. The three-dimensional views of vortical structures were constructed by applying the Taylor hypothesis to the jet cross-sectional images. From the images, the boundary surface area, the unmixed area, the complexity and the fractal dimension were calculated to discuss mixing and diffusion. The result suggests that the simultaneous enhancement of axisymmetric and streamwise vortices is very effective to increase mixing.
