Particle streak velocimetry-optical coherence tomography: a novel method for multidimensional imaging of microscale fluid flows | Zendy

Kevin C. Zhou | Zendy; Brendan K. Huang | Zendy; Ute A. Gamm | Zendy; Vineet Bhandari | Zendy; Mustafa K. Khokha | Zendy; Michael A. Choma | Zendy

Open Access

Particle streak velocimetry-optical coherence tomography: a novel method for multidimensional imaging of microscale fluid flows

Author(s) -

Kevin C. Zhou,

Brendan K. Huang,

Ute A. Gamm,

Vineet Bhandari,

Mustafa K. Khokha,

Michael A. Choma

Publication year - 2016

Publication title -

biomedical optics express

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 1.362

H-Index - 86

ISSN - 2156-7085

DOI - 10.1364/boe.7.001590

Subject(s) - microscale chemistry , optical coherence tomography , particle tracking velocimetry , streak , particle image velocimetry , velocimetry , optics , physics , flow (mathematics) , flow velocity , vector field , streak camera , fluid dynamics , mechanics , mathematics , laser , turbulence , mathematics education

We present a new OCT method for flow speed quantification and directional velocimetry: particle streak velocimetry-OCT (PSV-OCT). PSV-OCT generates two-dimensional, 2.5-vector component (vx ,|vy |,vz ) maps of microscale flow velocity fields. Knowledge of 2.5-vector components also enables the estimation of total flow speed. The enabling insight behind PSV-OCT is that tracer particles in sparsely-seeded fluid flow trace out streaks in (x,z,t)-space. The streak orientations in x-t and z-t yield vx and vz , respectively. The in-plane (x-z plane) residence time yields the out-of-plane speed |vy |. Vector component values are generated by fitting streaks to a model of image formation that incorporates equations of motion in 3D space. We demonstrate cross-sectional estimation of (vx ,|vy |,vz ) in two important animal models in ciliary biology: Xenopus embryos (tadpoles) and mouse trachea.

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