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In-Line Digital Holographic Measurement for Liquid-Liquid Flows

[+] Author Affiliations
Fabrice Lamadie

French Alternative Energies and Atomic Energy Commission (CEA), Bagnols-sur-cèze, France

Laurent Bruel

French Alternative Energies and Atomic Energy Commission, Bagnols-sur-cèze, France

Paper No. FEDSM2013-16086, pp. V01CT24A001; 9 pages
doi:10.1115/FEDSM2013-16086
From:
  • ASME 2013 Fluids Engineering Division Summer Meeting
  • Volume 1C, Symposia: Gas-Liquid Two-Phase Flows; Industrial and Environmental Applications of Fluid Mechanics; Issues and Perspectives in Automotive Flows; Liquid-Solids Flows; Multiscale Methods for Multiphase Flow; Noninvasive Measurements in Single and Multiphase Flows; Numerical Methods for Multiphase Flow; Transport Phenomena in Energy Conversion From Clean and Sustainable Resources; Transport Phenomena in Materials Processing and Manufacturing Processes; Transport Phenomena in Mixing; Turbulent Flows: Issues and Perspectives
  • Incline Village, Nevada, USA, July 7–11, 2013
  • Conference Sponsors: Fluids Engineering Division
  • ISBN: 978-0-7918-5556-0
  • Copyright © 2013 by ASME

abstract

This article deals with a direct application of digital in line holography to liquid droplets dispersed in a continuous liquid phase. The droplet size imposes a regime of intermediate-field diffraction hardly explored to date. Acquired diffraction patterns show that the usual dark disk model is not valid and that good agreement is obtained with a mixed model coupling thin lens with opaque disk. Hologram focusing is nevertheless performed with a dedicated automated method. A literature review has been conducted to identify the sharpest autofocus function for our application. In a second step, in order to measure high retention rates, an inverse problem approach is then applied on all the outliers and missing droplets. This hologram restitution treatment has been applied to experimental results with a comparison to independent measurements.

Copyright © 2013 by ASME

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