Journal of Flow Visualization and Image Processing

ISSN for PRINT: 1065-3090

For Online Access

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2004, Volume11

Issue 2

65 pages

DOI: 10.1615/JFlowVisImageProc.v11.i2

Issue price - $154.00

V. Bertola
Ecole Normale Superieure, Laboratoire de Physique Statistique, 24 Rue Lhomond 75005 Paris, France

The structure of gas-liquid, two-phase flow is studied by means of a time-averaged tomographic technique, which provides a representation of the local flow structure on a given cross section. Single-fiber optical probes, sensitive to the refractive index of the surrounding medium, were used to measure the local void fraction distribution, which corresponds to the time-averaged gas concentration. The spatial resolution was enhanced by bi-harmonic spline interpolation of the experimental data; the flow structure in a generic position between two reference cross sections was obtained by linear interpolation. The proposed measurement technique was applied to the investigation of an air-water intermittent flow in horizontal pipes of large diameters (0.06 and 0.08 m i.d.). The water mass flow rate was 3 kg/s, while the gas fraction of volume flow ranged from 20% to 85%. Test sections with a constant diameter and with a sharp-edged abrupt area contraction were used.

DOI: 10.1615/JFlowVisImageProc.v11.i2.30 Download article, 20 pages

Article price - $50.00

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