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扫描失焦粒子跟踪用于在苛刻的微流体系统中对流动的实验性表征

Quentin Galand, David Blinder, Pierre Gelin

|April 3, 2024

概括

一种新的扫描粒子图像速度测量方法精确地绘制了微流体设备中的3D粒子运动. 这种技术为研究复杂的流量提供了高精度,包括声学和压力驱动的现象.

科学领域:

流体动力学流体动力学
微流体学微流体学
光学测量技术的使用

背景情况:

描述微流体流需要高分辨率的3D速度测量.
现有的技术可能缺乏复杂的微观现象的精度或深度范围.

研究的目的:

为微流体应用引入一种新的扫描粒子图像速度计 (sPIV) 技术.
为了证明sPIV能够以微米精度重建3D粒子轨迹的能力.

主要方法:

通过在固定焦平面上振荡样本开发了一个3DsPIV系统.
在微通道中获得的粒子轨迹数据.
处理数据以重建3D流域.

主要成果:

成功重建了粒子轨迹,在更深的深度上以微米准确度重建了粒子轨迹.
通过描述压力驱动的流量来验证该技术.
在微通道内的声流中报告了2μm粒子的3D轨迹.

结论:

拟议的sPIV技术为微流体流量表征提供了前所未有的精度.
这种方法非常适合研究声流和其他复杂的微观现象.

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