Pressure distribution around a circular cylinder resting on a flat boundary in an oscillating fluid Public Deposited

http://ir.library.oregonstate.edu/concern/graduate_thesis_or_dissertations/cr56n342n

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  • This study was undertaken to provide information needed in the design of ocean outfalls. A review of past investigations concerning forces on submerged objects is presented. Objects independent of any boundary and cylinders in boundary contact are considered. A solution for pressure distribution about a circular cylinder resting on a flat boundary in an oscillatory fluid is derived. The energy equation is used as a framework for this derivation. The G. B. Airy (1845) equations of particle motion in waves are used with potential flow theories. The resulting pressure distribution equation considers differences in water level with the passing wave and differences in orbital motion of the water particles referenced to depth above the boundary. This pressure distribution equation does not include viscous or inertial effects on the cylinder. The derived pressure distribution equation is programmed for digital computer solution. Dimensionless ratios between the measured horizontal force on the cylinder and wave characteristics are organized. Correlation between these dimensionless ratios indicates an increase of force with an increase in wave height for any given depth, although data scatter is present. The pressure distribution equation is integrated graphically and the resulting net force differs from the corresponding experimental force by 16 percent to 70 percent.
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  • File scanned at 300 ppi using ScandAll PRO 1.8.1 on a Fi-6770A in PDF format. CVista PdfCompressor 4.0 was used for pdf compression and textual OCR.
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