PIVによる音場浮遊液滴の内外部流動同時計測

抄録

One of the major recent advances for experiments in containerless processing is acoustic levitation. Although there are a lot of previous studies for acoustic levitation, the characteristics of internal and external flow of an acoustically levitated droplet is not experimentally examined enough. In this study, flow fields of an acoustically levitated droplet were experimentally investigated by observing those of a droplet simultaneously. The flow field has been obtained using Particle Image Velocimetry (PIV). In an empty chamber, vertical upward flow is generated along its central axis of test section by an acoustic wave. Velocity distributions of external and internal flow of a levitated droplet were obtained from PIV results. Also, comparing our experimental result with Yarin' s theory[12], our experimental data is in good agreement with the theoretical approach.