Experimental characterization of thin films, droplets and rivulets using LED fluorescence

Experimental characterization of thin films, droplets and rivulets using LED fluorescence Imaging based on fluorescence has been used in the past to investigate, mostly in a qualitative manner, liquid films occurring in various applications. In the present paper, a simple quantitative experimental setup and the associated calibration procedure are detailed for a configuration involving Rhodamin B or Rhodamin 101 excited with light-emitting diodes (LEDs). The measurement procedure has been first validated for an open-channel flow considering different Reynolds numbers around 550 and has then been applied to the characterization of thin films, isolated droplets and rivulets. Using this technique the film thickness, film velocity and contact angle have been evaluated accurately for a variety of flow conditions. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Experiments in Fluids Springer Journals

Experimental characterization of thin films, droplets and rivulets using LED fluorescence

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Publisher
Springer-Verlag
Copyright
Copyright © 2011 by Springer-Verlag
Subject
Engineering; Fluid- and Aerodynamics; Engineering Fluid Dynamics; Engineering Thermodynamics, Heat and Mass Transfer
ISSN
0723-4864
eISSN
1432-1114
D.O.I.
10.1007/s00348-011-1232-x
Publisher site
See Article on Publisher Site

Abstract

Imaging based on fluorescence has been used in the past to investigate, mostly in a qualitative manner, liquid films occurring in various applications. In the present paper, a simple quantitative experimental setup and the associated calibration procedure are detailed for a configuration involving Rhodamin B or Rhodamin 101 excited with light-emitting diodes (LEDs). The measurement procedure has been first validated for an open-channel flow considering different Reynolds numbers around 550 and has then been applied to the characterization of thin films, isolated droplets and rivulets. Using this technique the film thickness, film velocity and contact angle have been evaluated accurately for a variety of flow conditions.

Journal

Experiments in FluidsSpringer Journals

Published: Nov 23, 2011

References

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