マイクロT字ジャンクションにおける液滴生成機構の実験的考察

抄録

The T-junction is the most common channel shape used for microdroplet generation. To control the droplet size, it is necessary to acquire the time series of each force acting between two fluids. The purpose of this study is to investigate the mechanism of microdroplet formation in micro T-junction using confocal micro PIV (Particle Image Velocimetry). As a result of the measurement, it was confirmed that when the resultant force of the upstream pressure of continuous phase and the shear force acting on the interface exceeded the interfacial tension against the deformation of the interface, it shifted to the Necking stage where the interface spontaneously splits.