Laser induced phosphorescence imaging for the investigation of evaporating liquid flows

Laser induced phosphorescence imaging for the investigation of evaporating liquid flows The phosphorescence properties of liquid and gaseous acetone, following excitation at 308 nm, are studied and utilized in order to overcome two main challenges of two-phase flow laser induced fluorescence imaging: the large fluorescence intensity disparity between the two phases and the ensuing effect of halation. This is achieved on account of the different phosphorescence decay rates of the liquid and vapour phases, which allow for a more favourable signal ratio to be obtained. The benefits of visualizing the phosphorescence emission, instead of the fluorescence, are demonstrated by droplet stream experiments set up in different bath gases, at 1 atm and 297 K. The liquid–vapour interface can be accurately located, while the vapour surrounding the droplets is clearly visualized without any halation interference. The vapour phase phosphorescence signal was calibrated in order to quantify the vapour concentration around an evaporating droplet stream, and the results are compared to laser induced fluorescence images collected in the present study and results found in the literature. The effect of halation in the fluorescence images is shown to extend as far as 10 droplet diameters away from the interface for 161 μm droplets, resulting in a significant overprediction of acetone vapour mole fractions in that region. The vapour profile obtained by laser induced phosphorescence (LIP) imaging agrees with data found in the literature, for which a halation correction on fluorescence images was successfully performed. The demonstrated LIP technique for simultaneous vapour and liquid phase visualisation is only applicable to oxygen-free environments, as even trace quantities of oxygen completely quench the vapour phase phosphorescence emission. Experiments in Fluids Springer Journals

Laser induced phosphorescence imaging for the investigation of evaporating liquid flows

Loading next page...
Copyright © 2013 by Springer-Verlag Berlin Heidelberg
Engineering; Engineering Fluid Dynamics; Fluid- and Aerodynamics; Engineering Thermodynamics, Heat and Mass Transfer
Publisher site
See Article on Publisher Site


You’re reading a free preview. Subscribe to read the entire article.

DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

Monthly Plan

  • Read unlimited articles
  • Personalized recommendations
  • No expiration
  • Print 20 pages per month
  • 20% off on PDF purchases
  • Organize your research
  • Get updates on your journals and topic searches


Start Free Trial

14-day Free Trial

Best Deal — 39% off

Annual Plan

  • All the features of the Professional Plan, but for 39% off!
  • Billed annually
  • No expiration
  • For the normal price of 10 articles elsewhere, you get one full year of unlimited access to articles.



billed annually
Start Free Trial

14-day Free Trial