抄録
When a single bubble goes up in liquid, a bubble moves three-dimensionally and meanderingly. Its trajectory changes from straight to straight by zigzag and spiral as the diameter of bubble increases. But the detail of bubble's behavior has not been clear yet because a bubble shape shows a very complex change. It was shown by previous researches that behavior of rising single bubble of sub-mm size had reproducibility. In this study, Improving equipment for the experiment is carried out in order to obtain the knowledge of the detail of reproducibility. Moreover, images of bubbles of various size are taken multilaterally and it is attempted that constructing of three-dimensional shapes of a bubble.
