Measurement of Coherent Structure using Color Image Analyisis
Yoshio Ishii, Yuzuru Kubota · Journal of the Visualization Society of Japan · 1994
Coherent structure in fluid dynamics has been the subject of much reseach in resent years and substantially affect the development of technology.In this study, we attempt to investigate two-dimensional coherent structure using flow visualization and color image analysis. Here, coherent structure is originated mixing flow in the water channel and visualized to use some color dyes. Flow field of color regions is changed markedly and recorded by camera or video camera. Thereafter, we analyzed these pictures using personal computer. With the aid of color image analysis, it can be obitained physical quantites from visualization pictures. For example, it is measured each color area, fractal dimension and so on.