Hydrodynamics of a Concentric Twin Perforated Circular Cylinder System
Publication: Journal of Waterway, Port, Coastal, and Ocean Engineering
Volume 134, Issue 3
Abstract
An experimental investigations was carried out on a perforated circular cylinder ( diameter) encircling an impermeable cylinder ( diameter) at a constant water depth of for both regular and random waves in the wave flume at the Department of Ocean Engineering, Indian Institute of Technology, Madras, India. The porosity of the outer cylinder was varied from 4.54 to 19.15% to study the influence of porosity on wave forces on and water surface fluctuations in and around the twin cylinder system. A numerical method is developed based on the boundary integral equation method along with a porous body boundary condition, where the porosity is modeled using the resistance coefficient and added mass coefficient for regular waves. The resistance coefficient increases with the increase in porosity and wave heights except for a porosity of 4.54%, whereas the added mass coefficient is almost zero. Porosity in the range of can be recommended for the perforated cylinder based on the experimental results of wave forces and the water surface fluctuations inside the perforated cylinder.
Get full access to this article
View all available purchase options and get full access to this article.
References
Chakrabarti, S. K. (1980). “Inline forces on fixed vertical cylinder in waves.” J. Wtrwy., Port, Coast., and Oc. Div., 106(2), 145–155.
Dalrymple, R. A., Losada, M. A., and Martin, P. A. (1991). “Reflection and transmission from porous structures under oblique wave attack.” J. Fluid Mech., 224, 625–644.
Darwiche, M. K. M., Williams, A. N., and Wang, K. H. (1994). “Wave interaction with semiporous cylindrical breakwater.” J. Waterway, Port, Coastal, Ocean Eng., 120(4), 382–403.
Fugazza, M., and Natale, L. (1992). “Hydraulic design of perforated breakwaters.” J. Waterway, Port, Coastal, Ocean Eng., 118(1), 1–14.
Isaacson, M. de St. Q. (1978). “Wave runup around large circular cylinder.” J. Wtrwy., Port, Coast., and Oc. Div., 104(1), 69–79.
Isaacson, M., Baldwin, J., Allyn, N., and Cowdell, S. (2000). “Wave interactions with perforated breakwater.” J. Waterway, Port, Coastal, Ocean Eng., 126(5), 229–235.
Isaacson, M., Premasiri, S., and Yang, G. (1998). “Wave interactions with vertical slotted barrier.” J. Waterway, Port, Coastal, Ocean Eng., 124(3), 118–126.
Jarlan, J. E. (1961). “A perforated vertical wall breakwater.” Dock and harbour authority, Vol. 41, Chapman & Hall, London, 394–398.
Kenny, F. M., James, J. D., and Melling, T. H. (1976). “Nonlinear wave force analysis of perforated marine structures.” Proc., Offshore Technology Conf., OTC2501, Camelweb Architects, Tex.
MacCamy, R. C., and Fuchs, R. A. (1954). “Wave forces on piles: A diffraction theory.” Tech. Memo. No. 69, Beach Erosion Board, Washington, D.C.
Mei, C. C., Liu, P. L. F., and Ippen, A. T. (1974). “Quadratic loss and scattering of long waves.’ J. Wtrwy., Harb. and Coast. Engrg. Div., 100(3), 217–239.
Mogridge, G. R., and Jamieson, W. W. (1975). “Wave loads on large circular cylinders- A design method.” Rep. No. MH-111, National Research Council of Canada, Division of Mechanical Engineering, Ottawa, 34.
Murali, K. (1996). “Response of a cage floating breakwater to regular waves.” Ph.D. thesis, Indian Institute of Technology, Madras, India.
Neelamani, S., Koether, G., Schuettrumpf, H., Muttray, M., and Oumeraci, H. (2000). “Wave forces on and water surface fluctuations around a vertical cylinder encircled by a perforated square caisson.” Ocean Eng., 27, 775–800.
Neelamani, S., Uday Bhaskar, N., and Vijayalakshmi, K. (2002). “Wave forces on seawater intake caisson.” Ocean Eng., 29, 1247–1263.
Sollitt, C. K., and Cross, R. H. (1972). “Wave transmission through permeable breakwaters.” Proc., 13th Coastal Engineering Conf., ASCE, New York, 1827–1846.
Teng, B., Zhang, X. T., and Ning, D. Z. (2004). “Interaction of oblique waves with infinite number of perforated caissons.” Ocean Eng., 31, 615–632.
Wang, K. H., and Ren, X. (1994). “Wave interaction with a concentric porous cylinder system.” Ocean Eng., 21, 343–360.
Williams, A. N., and Li, W. (1998). “Wave interaction with a semi-porous cylindrical breakwater mounted on a storage tank.” Ocean Eng., 25, 195–219.
Yu, X. (1995). “Diffraction of water waves by porous breakwaters.” J. Waterway, Port, Coastal, Ocean Eng., 121(6), 275–282.
Information & Authors
Information
Published In
Copyright
© 2008 ASCE.
History
Received: Jun 29, 2005
Accepted: Apr 16, 2007
Published online: May 1, 2008
Published in print: May 2008
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.