Fluorescent particle image velocimetry: Application to flow measurement in refractive index-matched porous media

Journal Article · Sat Jul 20 04:00:00 EDT 1991 · Applied Optics; (United States)

DOI:https://doi.org/10.1364/AO.30.003034· OSTI ID:5471723

Northrup, M A; Kulp, T J; Angel, S M ^[1]

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1. Lawrence Livermore National Laboratory, Environmental Sciences Division, P.O. Box 5507, L-524, Livermore, California 94550 (US)

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 technique 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.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 5471723
• Journal Information: Applied Optics; (United States), Journal Name: Applied Optics; (United States) Vol. 30:21; ISSN 0003-6935; ISSN APOPA
• Country of Publication: United States
• Language: English

Related Subjects

440600* -- Optical Instrumentation-- (1990-)
47 OTHER INSTRUMENTATION
FLOW VISUALIZATION
FLUID FLOW
FLUORESCENCE
IMAGES
LUMINESCENCE
MATERIALS
OPTICAL PROPERTIES
PHYSICAL PROPERTIES
POROUS MATERIALS
REFRACTIVITY
RESOLUTION
SPATIAL RESOLUTION
VELOCITY