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Updated: Jun 1, 2026

Fluorescence detection methods for microfluidic droplet platforms

Fluorescence detection methods for microfluidic droplet platforms

Published on: December 10, 2011

UV reactor flow visualization and mixing quantification using three-dimensional laser-induced fluorescence.

Varun Gandhi¹, Philip J W Roberts, Thorsten Stoesser

¹School of Civil and Environmental Engineering, Georgia Institute of Technology, 200 Bobby Dodd Way, Atlanta, GA 30332-0373, USA.

|May 27, 2011

Summary

This summary is machine-generated.

Three-dimensional laser-induced fluorescence visualized mixing in UV reactors, revealing flow paths and UV exposure zones. This technique aids in optimizing UV disinfection reactor design and performance.

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Quantifying Mixing using Magnetic Resonance Imaging

Quantifying Mixing using Magnetic Resonance Imaging

Published on: January 25, 2012

Area of Science:

Fluid dynamics
Optical diagnostics
UV disinfection technology

Background:

Understanding mixing is crucial for effective UV disinfection.
UV reactors require optimization for uniform dose delivery.
Flow patterns around bluff bodies, like UV sleeves, influence mixing.

Purpose of the Study:

To visualize and quantitatively analyze mixing in a lab-scale UV reactor.
To investigate the impact of flow paths on UV dose delivery.
To develop and apply a novel three-dimensional laser-induced fluorescence (3DLIF) technique.

Main Methods:

Utilized three-dimensional laser-induced fluorescence (3DLIF) for visualization.
Analyzed mixing in a lab-scale UV reactor with a perpendicular lamp sleeve.
Injected dye at various heights to map multiple flow paths.

Main Results:

Successfully visualized recirculation zones and von Karman vortex shedding.
Identified flow paths with varying residence times and UV exposure near the sleeve.
Observed higher velocities and minimal sleeve influence in paths away from the center height.

Conclusions:

3DLIF provides critical insights into UV dose delivery within reactors.
Flow path analysis is essential for optimizing UV reactor design.
The study offers a new method for enhancing UV disinfection efficiency.