Hydrodynamic Coefficients and Depth Parameter
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 111, Issue 1
Abstract
The in-line forces measured on a small section of a fixed vertical cylilnder in waves are analyzed to determine the effects of the hydrodynamic coefficients on the water depth parameter or the orbital shape parameter, Ο. The coefficients, CM, CD as well as an rms force coefficient, CF derived from these forces are found to be insensitive to the value of Ο in the range of Ο = 0.3 to 0.9. In an earlier study, it was shown from the test data that the values of CF at Ο = 0.9 were distinctly different from those at Ο = 0.3 - -0.7. Thus, the present study contradicts the results of the previous study. In the range of KC values of 0 - 40, however, the force coefficients compare well with U-tube experimental data.
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References
1.
Chakrabarti, S. K., “In‐Line Forces on a Fixed Vertical Cylinder in Waves,” Journal of the Waterway, Port, Coastal, and Ocean Division, ASCE, Vol. 106, No. WW2, May, 1980, pp. 145–155.
2.
Ramberg, S. E., discussion of “In‐Line Forces on a Fixed Vertical Cylinder in Waves,” by S. K. Chakrabarti, Journal of the Waterway, Port, Coastal, and Ocean Division, ASCE, Vol. 107, No. WW1, Feb., 1981, pp. 45–46.
3.
Ramberg, S. E., and Niedzwecki, J. M., “Some Uncertainties and Errors in Wave Force Computations,” Proceedings on Offshore Technology Conference, May, 1979, pp. 2091–2101.
4.
Sarpkaya, T., “Vortex Shedding and Resistance in Harmonic Flow about Smooth and Rough Circular Cylinders at High Reynolds Numbers,” Naval Postgraduate School, Report No. NPS 59SL 76021, Monterey, Calif., 1976.
5.
Stansby, P. K., Bullock, G. N., and Short, I., “Quasi‐2‐D Forces on a Vertical Cylinder in Waves,” Journal of Waterway, Port, Coastal, and Ocean Engineering, ASCE, Vol. 109, No. WW1, Feb., 1983, pp. 128–132.
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Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 111 • Issue 1 • January 1985
Pages: 123 - 127
Copyright
Copyright © 1985 ASCE.
History
Published online: Jan 1, 1985
Published in print: Jan 1985
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