Abstract The 3D characterization of bubbly flow is of wide application in engineering. A double pulse/double frame digital holographic particle tracking velocimetry (DHPTV) system is applied to measure the bubbles in an electrolytic cell. It is found that the actual bubble depth position should be corrected from the reconstructed position by multiplying the refractive index of the surrounding medium. Spherical bubbles and other irregular particles can be discriminated from their shapes. The three-dimensional position, particle size distribution, three-dimensional velocity of over 60,000 bubbles with size ranging from 25 μ m to 400 μ m are detected and analyzed with DHPTV, and statistics on bubble velocities in the y direction reveal bubble acceleration of 6.8 mm/s 2 .

中文翻译：

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使用数字全息粒子跟踪测速 (DHPTV) 量化涡流中的气泡大小和 3D 速度

摘要 气泡流的三维表征在工程中有着广泛的应用。双脉冲/双帧数字全息粒子跟踪测速（DHPTV）系统用于测量电解池中的气泡。发现实际气泡深度位置应从重建位置乘以周围介质的折射率来校正。球形气泡和其他不规则颗粒可以从它们的形状上区分。使用DHPTV对6万多个25μm~400μm的气泡进行三维位置、粒度分布、三维速度检测分析，统计y方向气泡速度，气泡加速度为6.8毫米/秒 2 .