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3D holographic PTV measurements of micro-scale flows

机译：微型流量的3D全息PTV测量

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Holographic PTV (HPTV) is one of powerful means to get 3D (three-dimensional) velocity field information of flows. A micro-HPTV technique was developed and applied to measure 3D velocity fields of various micro-scale flows, including the flows in straight and curved micro-tubes having a circular cross-section and the 3D motion of red blood cells in a micro-tube. The inertial migration of neutrally buoyant micro-spheres suspended in a micro-tube was also investigated with varying Reynolds number and particle size. In addition, the motile characteristics of 3D motion of free-swimming chain-forming phytoplankton having different number of cells in various configurations were analyzed using the micro-HPTV technique. From time-varying 3D trajectories of swimming microorganisms, their swimming behaviors and swimming motion parameters were extracted successfully. Through these experiments, the micro-HPTV method was found to have strong potential in the accurate measurements of temporal variations of 3D velocity fields of various micro-scale flows and 3D motility of RBCs and microorganisms.
机译：全息PTV（HPTV）是获取流的3D（三维）速度场信息的强大手段之一。研发了微型HPTV技术并将其应用于测量各种微尺度流的3D速度场，包括具有圆形横截面的直形和弯曲微管中的流以及微管中红细胞的3D运动。还研究了不同雷诺数和粒径下悬浮在微管中的中性浮力微球的惯性迁移。此外，使用微型HPTV技术分析了在各种配置下具有不同细胞数的自由游动链形成浮游植物的3D运动的运动特征。从游泳微生物的时变3D轨迹中，成功地提取了它们的游泳行为和游泳运动参数。通过这些实验，发现微型HPTV方法在准确测量各种微尺度流的3D速度场的时间变化以及RBC和微生物的3D运动性方面具有强大的潜力。

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