Methodologies for analyzing PIV and SIV results from a two-phase air/water experiment /
A new methodology has been developed to analyze the data captured from a two-phase bubbly-flow air/water experiment. The bubbly-flow experiment is conducted inside a vertically oriented cylindrical pipe having an inner diameter of 49 mm. The experimental matrix consists of 74 distinct points, each...
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| Format: | Thesis Book |
| Language: | English |
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[Place of publication not identified] :
[publisher not identified] ;
2002.
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| Online Access: | http://proxy.library.tamu.edu/login?url=http://proquest.umi.com/pqdweb?did=765105941&sid=1&Fmt=2&clientId=2945&RQT=309&VName=PQD |
| Summary: | A new methodology has been developed to analyze the data captured from a two-phase bubbly-flow air/water experiment. The bubbly-flow experiment is conducted inside a vertically oriented cylindrical pipe having an inner diameter of 49 mm. The experimental matrix consists of 74 distinct points, each point consisting of a unique combination of superficial velocities for the two phases. The maximum liquid Reynolds Number in the experimental matrix is 20,335 and the maximum volumetric fraction is 6.7%, at a liquid Reynolds Number of 1195. Two different techniques, the Particle-Image Velocimetry (PIV) and the Shadow-Image Velocimetry (SIV) techniques have been used to capture experimental data. The PIV technique has yielded a two-dimensional, two-velocity component, vector map of the liquid velocity field along a longitudinal plane of the pipe, across the full width of the pipe. The SIV technique has been used to measure the displacement of the discreetly identifiable air bubbles as they traverse the measurement volume, while also capturing the size, shape, and rotational behavior of each bubble. A new methodology has been developed to analyze the experimental data consisting of two parts, one each for the PIV data and for the SIV data. Analysis of the PIV data is achieved through the application of a grayscale cross-correlation Particle-Tracking Velocimetry methodology, whereby individual particle images are tracked from one frame to the next. On the other hand, the bubble images captured in the SIV data are analyzed, and the bubbles are reconstructed in three dimensions as nine-parameter ellipsoids. A review of the literature for experimental and numerical works will be made in this dissertation for bubbly-flow. Details will be provided for the experimental apparatus and the data acquisition system, along with calibration data. This will be followed by a description of the methodologies used to reduce the PIV and SIV data. Finally, selected data from the experiment will be analyzed as a validation of the methodologies. |
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| Item Description: | Vita. "Major Subject: Nuclear Engineering". |
| Physical Description: | ix, 106 leaves : illustrations ; 28 cm. Issued also on microfiche from University Microfilm Inc. |
| Bibliography: | Includes bibliographical references (leaves 102-105). |