Northrup M A, Kulp T J, Angel S M
Appl Opt. 1991 Jul 20;30(21):3034-40. doi: 10.1364/AO.30.003034.
This paper presents results in which particle image velocimetry (PIV) is used in conjunction with refractive index matching to measure fluid flow velocities within complex, multiphase systems. This application required the adaptation of PIV for use with fluorescent, rather than scattering, seed particles; we refer to the technique as fluorescent PIV (FPIV). We applied index-matched FPIV to the measurement of low flow velocities (tens of microns per second) at high spatial resolution (tens of microns) in a porous medium. We produced clear images of flowing particles in heterogeneous porous media and obtained reliable velocity vectors by a point-by-point interrogation of these images. We also found evidence of the intrapore mixing of porous media flow.
本文介绍了一些研究成果，其中粒子图像测速技术（PIV）与折射率匹配相结合，用于测量复杂多相系统内的流体流速。该应用需要对PIV进行调整，以便与荧光种子粒子而非散射种子粒子配合使用；我们将该技术称为荧光粒子图像测速技术（FPIV）。我们将折射率匹配的FPIV应用于多孔介质中高空间分辨率（几十微米）下低流速（每秒几十微米）的测量。我们获得了非均质多孔介质中流动粒子的清晰图像，并通过对这些图像逐点询问获得了可靠的速度矢量。我们还发现了多孔介质流体内孔混合的证据。
