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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 22 — Aug. 1, 2005
  • pp: 4648–4653

Fringe probing of gas-liquid interfacial film in a microcapillary tube

Xishi Wang and Huihe Qiu  »View Author Affiliations


Applied Optics, Vol. 44, Issue 22, pp. 4648-4653 (2005)
http://dx.doi.org/10.1364/AO.44.004648


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Abstract

An optical diagnostic technique has been developed to measure the gas-liquid interfacial film thickness in microcapillary two-phase flows. The spatial frequencies from the multiscattering measured with a CCD camera are used to determine the slug diameter and film thickness. It is found that, with an optimized optical orientation angle, the spatial frequency method shows great accuracy in the measurements. To demonstrate the capability of the newly developed method, a validation experiment was conducted in water-air and water-honey mixture-air two-phase flows. We measured the spatial frequency variations when the microbubble and slug were pulsating by utilizing a highly accurate signal processing technique and a five-point interpolation method. This newly developed optical method is easy to implement, and it will be a useful technique for two-phase flow measurements.

© 2005 Optical Society of America

OCIS Codes
(120.1880) Instrumentation, measurement, and metrology : Detection
(120.2650) Instrumentation, measurement, and metrology : Fringe analysis
(280.2490) Remote sensing and sensors : Flow diagnostics

Citation
Xishi Wang and Huihe Qiu, "Fringe probing of gas-liquid interfacial film in a microcapillary tube," Appl. Opt. 44, 4648-4653 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-22-4648


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