微小通道内液体扰流微孔逸出气泡串的迁移行为

对微小矩形通道内，液体扰流下微孔孔口逸出气泡串的迁移行为进行了可视化实验。基于图像处理方法，分别研究了液体流量和通道倾斜角度对气泡串尺寸、运动速度以及运动轨迹的影响。发现了不同工况下通道内的微气泡堆积现象，并对其进行了分析。结果表明：增大液体流量或者通道倾角，使得形成的气泡尺寸减小，气泡运动轨迹与通道壁面夹角减小，气泡运动速度增大。液体流量与通道倾角影响了通道内微气泡堆积的位置及数量。

Migration behavior of bubble cluster emerging from micro-orifice with liquid cross flow in mini-channel

Visualization experiments were performed on migration behavior of bubble cluster emerging from a micro-orifice with liquid cross flow in a mini rectangular channel. Based on the self-developed image processing method, the influences of liquid flow rate and inclination angle of the channel on the size, velocity and trajectory of bubble cluster were discussed. Meanwhile, micro-bubbles accumulation at the top wall of the channel was observed and analyzed under different operating conditions. The bubbles size as well as the angle between bubble trajectory and channel bottom wall decreased with increasing liquid flow rate and inclination angle of the channel. Furthermore, the location and number of the micro-bubbles accumulated at the top wall were distinctly affected by liquid flow rate and channel inclination angle.