Optically efficient fluorescent tracers for multi-constituent PIV

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

Research output: Contribution to journalArticlepeer-review

Abstract

This paper was motivated by the need for improved instrumentation to study mixing processes in multi-constituent and multi-phase fluid systems. The development of a single colour camera PIV system that can image micron size spectrally distinct fluorescent droplets in a multi-constituent gas phase flow is reported. Concentrations of fluorescent dyes in solution have been optimised to achieve sufficient fluorescence visibility. The adopted philosophy is to exploit the inherent co-registration offered by a 3-chip colour CCD camera with the images recorded in the three colour planes enabling flow constituent/phase to be determined as well as pulse order. The results show that the spectral discrimination process is robust and in a well mixed gas-phase flow the average error between the flow velocities in the two constituents is < 4%. The use of UV excitation (on suitably excitable dyes) has the added benefit of spectrally separating the excitation wavelength from the imaging bandwidth to allow 'flare removal'.

Original languageEnglish
Pages (from-to)623-631
Number of pages9
JournalExperiments in fluids
Volume45
Issue number4
DOIs
Publication statusPublished - Oct 2008

Keywords

  • PARTICLE IMAGE VELOCIMETRY
  • 2-PHASE FLOW MEASUREMENTS
  • SIZING TECHNIQUES
  • SYSTEM

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