21018 音響浮遊液滴の界面変形と内部流動の相関に関する研究(一般講演二相流(2))

概要

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Under the microgravity environment, products of new and high quality materials solidified into homogeneous crystal have been the subject of much interest. Usually, a large levitated droplet is utilized for such a containerless processing. However, surface instability and internal flow appear remarkably when the droplet becomes large. Elucidation of effect of surface instability and internal flow of the levitated droplet is required for the quality improvement of new material. In the previous study, internal flow is confirmed on levitated droplet. In the present study, the experimental investigation of levitated droplet by ultrasound is conducted under the normal gravity environment. The purpose of this study is examined the effects on internal flow when the equivalent diameter and aspect ratio of levitated droplet. In this experiment we focus on the flow transition and the flow condition. The internal flow structure in the levitated droplets is measured by two dimensional Particle Image Velocimetry (PIV) techniques, and the dominant factor which induces the internal flow is discussed.
一般社団法人日本機械学会の論文
2010-03-09