Optically efficient fluorescent tracers for multi-constituent PIV

Angarita-Jaimes, D. A.; Ormsby, M. P.; Chennaoui, Mourad; Angarita-Jaimes, N.; Towers, Catherine E.; Jones, Anita C.; Towers, David P.

doi:10.1007/s00348-008-0558-5

Cited by 7 publications

(8 citation statements)

References 12 publications

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“…In Ref , beads are detected through PTV which gives better results than PIV for microfluidic and low density systems. Despite their good detectability, the use of fluorescent microparticles is largely limited to turbulent flow studies in small‐scale laboratory experiments …”

Section: Why Tracersmentioning

confidence: 99%

“…60 For instance, dedicated fluorescent microparticles have been synthesized for PIV laboratory scale studies; such tracers show high efficiency and detectability at almost every flow velocity and water depth. 98,99 Fluorescent polymer nano and microspheres have been used to study near-wall fluid motion 100 and mixing processes in multiconstituent and multiphase fluid systems. 98 In Ref 100, beads are detected through PTV which gives better results than PIV for microfluidic and low density systems.…”

Section: What Is a Tracer?mentioning

confidence: 99%

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Particle tracers and image analysis for surface flow observations

Tauro

2015

WIREs Water

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Traditional observational methodologies have proved insufficient to thoroughly characterize the hydrological response of natural environments. In this context, recent efforts have fostered unprecedented observational methodologies for hydrological processes at the interface of multiple engineering and scientific fields and water science. This overview outlines latest advancements in the observation of surface flows through a novel methodology based on the combined use of high‐visibility tracer particles and digital image acquisition and processing. This low‐cost measurement system has been designed and tested in laboratory settings and natural environments, such as rill flow in natural hillslopes and riverine ecosystems. Comparison of this novel flow sensing method to traditional tracing systems has suggested that the use of multidisciplinary and unintended technology can greatly contribute to advance standard practice in environmental monitoring and to open novel research avenues in water science. WIREs Water 2016, 3:25–39. doi: 10.1002/wat2.1116 This article is categorized under: Science of Water > Methods

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Section: Why Tracersmentioning

confidence: 99%

Section: What Is a Tracer?mentioning

confidence: 99%

Particle tracers and image analysis for surface flow observations

Tauro

2015

WIREs Water

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“…Related research on Particle Image Velocimetry (PIV) in fluid dynamics [ 29 ] and hydrology [ 30 ] has also fueled the design and characterization of novel particle tracers for flow studies [ 31 ]. Among this class of beads, fluorescent particles show high efficiency and detectability at almost every flow velocity and water depth [ 32 , 33 ]. The synthesis of dedicated fluorescent particles for PIV laboratory-scale studies is reported in [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

“…Among this class of beads, fluorescent particles show high efficiency and detectability at almost every flow velocity and water depth [ 32 , 33 ]. The synthesis of dedicated fluorescent particles for PIV laboratory-scale studies is reported in [ 32 ]. Fluorescent polymer nano- and microspheres have been used to study near-wall fluid motion [ 34 ] and mixing processes in multiconstituent and multiphase fluid systems [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

“…The synthesis of dedicated fluorescent particles for PIV laboratory-scale studies is reported in [ 32 ]. Fluorescent polymer nano- and microspheres have been used to study near-wall fluid motion [ 34 ] and mixing processes in multiconstituent and multiphase fluid systems [ 32 ]. In biomedicine, vision-based methodologies rely on the enhanced visibility of fluorescent corpuscles in turbid media to identify and isolate proteins and pathogens in living organisms [ 35 – 38 ].…”

Section: Introductionmentioning

confidence: 99%

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Characterization of Buoyant Fluorescent Particles for Field Observations of Water Flows

Tauro

Aureli

Porfiri

et al. 2010

Sensors

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In this paper, the feasibility of off-the-shelf buoyant fluorescent microspheres as particle tracers in turbid water flows is investigated. Microspheres’ fluorescence intensity is experimentally measured and detected in placid aqueous suspensions of increasing concentrations of clay to simulate typical conditions occurring in natural drainage networks. Experiments are conducted in a broad range of clay concentrations and particle immersion depths by using photoconductive cells and image-based sensing technologies. Results obtained with both methodologies exhibit comparable trends and show that the considered particles are fairly detectable in critically turbid water flows. Further information on performance and integration of the studied microspheres in low-cost measurement instrumentation for field observations is obtained through experiments conducted in a custom built miniature water channel. This experimental characterization provides a first assessment of the feasibility of commercially available buoyant fluorescent beads in the analysis of high turbidity surface water flows. The proposed technology may serve as a minimally invasive sensing system for hazardous events, such as pollutant diffusion in natural streams and flash flooding due to extreme rainfall.

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Three-component multi-phase velocimetry measurements on a GDI spray using optically efficient fluorescent tracers

Angarita-Jaimes

Towers

2011

Exp Fluids

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Two-and three-component multi-phase air/fuel measurements have been performed on a GDI injector. UV-excitable fluorescent tracers have been used to seed the gas phase, and the naturally occurring droplets in the fuel are the other phase. A high-pressure multi-hole GDI injector was mounted in a rig with a glass barrel to simulate the engine cylinder and provide optical access. Images were obtained under controlled conditions of fuel pressure and injection duration. Flow phase and pulse order have been determined from a single 3CCD colour camera. Suitable corrective processes have been adapted and implemented to account for crosstalk and chromatic aberrations so that the uncertainty of the velocity vectors produced is comparable to that of conventional PIV using 532 nm illumination. Multi-phase air/fuel vector maps have been produced. A second colour camera has been added to obtain stereo velocity measurements providing previously unavailable simultaneous information on the multi-phase (fuel/air) interaction with three velocity components.

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Optically efficient fluorescent tracers for multi-constituent PIV

Cited by 7 publications

References 12 publications

Particle tracers and image analysis for surface flow observations

Particle tracers and image analysis for surface flow observations

Characterization of Buoyant Fluorescent Particles for Field Observations of Water Flows

Three-component multi-phase velocimetry measurements on a GDI spray using optically efficient fluorescent tracers

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