Turbulent Separation Around Cylinders in Waves
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 112, Issue 2
Abstract
The development of the turbulent boundary layer around a circular cylinder in oscillatory flow is investigated by the depth integrated equation of momentum. The shape of the velocity profile is assumed to be log‐linear. The development of the downstream separation point with time is studied as a function of the Keulegan‐Carpenter number and relative roughness for a rough cylinder, and as a function of the Reynolds number for a smooth cylinder. The paper suggests the parametric variation in the drag coefficient with the Reynolds number or relative roughness at small KC‐numbers (smaller than about 8–10) where vortex shedding does not take place.
Get full access to this article
View all available purchase options and get full access to this article.
References
1.
Bradshaw, P., “The Turbulent Structure of Equilibrium Boundary Layers,” Journal of Fluid Mechanics, Vol. 29, 1967, pp. 625–645.
2.
Engelund, F., “Analogy Between the Velocity Distribution in a Stable Atmosphere and in Divergent Channels,” The Physics of Fluids, Vol. 16, 1973, pp. 1768–1770.
3.
Engelund, F., “Energy and Momentum Equation for Non‐Uniform Flow,” Series Paper 29, ISVA, Tech. Univ. of Denmark, 1981, 52 pp.
4.
Eskesen, S. D., et al., “Drag Forces on Large Cylinders,” thesis presented to the Technical Univ. of Denmark, in 1982, in partial fulfillment of the requirements for the degree of Master of Science (in Danish).
5.
Fredsøe, J., “The Turbulent Boundary Layer in Combined Wave‐Current Motion,” J. Hydraulic Division, Aug., 1984, pp. 1103–1120.
6.
Grass, A. J., and Kemp, P. H., “Flow Visualisation Studies of Oscillatory Flow Past Smooth and Rough Circular Cylinders,” Mech. of Wave‐Induced Forces on Cylinders, Symposium Proceedings. Bristol 1978. Pitman, 1979.
7.
Iwagaki, Y., and Ishida, H., “Flow Separation, Wake Vortices and Pressure Distribution Around a Circular Cylinder Under Oscillatory Waves,” Coastal Engineering Conference, Honolulu, HI, 1976, pp. 2341–2356.
8.
Keulegan, G. H., and Carpenter, L. H., “Forces on Cylinders and Plates in an Oscillating Fluid,” Journal of Research, NBS, Vol. 60, 1958, pp. 423–400.
9.
Lundgren, H., Sand, S., Kirkegaard, J., “Drift Forces and Damping in Natural Sea States,” International Conference on the Behaviour of Offshore Structures (BOSS '82), MIT, Cambridge, MA, 1982, Vol. 2, pp. 592–607.
10.
Sarpkaya, T., “Forces on Cylinders and Spheres in a Sinusoidal Oscillating Fluid,” Journal of Applied Mechanics, Vol. 42, 1975, pp. 32–37.
11.
Sarpkaya, T., and Isaacson, “Mechanics of Wave Forces on Offshore Structures,” Van Nostrand‐Reinhold, Co., Inc., New York, NY, 1981.
12.
Schlichting, H., “Boundary‐Layer Theory,” McGraw‐Hill Book Co., New York, NY, 6th ed., 1968.
13.
Verley, R. L. P., “Oscillations of a Cylinder in Still Water,” Report STFGO A78046, Vassdrag og Havne Laboratorium, Trondheim, Norway, 1978, 20 pp.
Information & Authors
Information
Published In
Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 112 • Issue 2 • March 1986
Pages: 217 - 233
Copyright
Copyright © 1986 ASCE.
History
Published online: Mar 1, 1986
Published in print: Mar 1986
Authors
Metrics & Citations
Metrics
Citations
Download citation
If you have the appropriate software installed, you can download article citation data to the citation manager of your choice. Simply select your manager software from the list below and click Download.