Experimental Study on Flow Characteristics of Regular Wave Interacting with Rectangular Floating Structure Using PIV Technique

PIV시스템을 이용한 규칙파중 2차원 사각형 부유식 구조물 주위의 유동특성 연구

  • Jung, Kwang-Hyo (Department of Naval Architecture and Ocean Engineering, Pusan National University) ;
  • Chun, Ho-Hwan (Department of Naval Architecture and Ocean Engineering, Pusan National University)
  • 정광효 (부산대학교 조선해양공학과) ;
  • 전호환 (부산대학교 조선해양공학과)
  • Published : 2006.12.30


This experimental study investigated the flow characteristics for regular waves passing a rectangular floating structure in a two-dimensional wave tank. The particle image velocimetry (PIV) was employed to obtain the velocity field in the vicinity of the structure. The phase average was used to extract the mean flow and turbulence property from repeated instantaneous PIV velocity profiles. The mean velocity field represented the vortex generation and evolution on both sides of the structure. The turbulence properties, including the turbulence length scale and the turbulent kinetic energy budget were investigated to characterize the flow interaction between the regular wave and the structure. The results shaw the vortex generated near the structure corners, which are known as the eddy-making damping or viscous damping. However, the vortex induced by the wave is longer than the roll natural period of the structure, which presents the phenomena opposing the roll damping effect; that is, the vortex may increase the roll motion under the wave condition longer than the roll natural period.


  1. Browne, L.W.B., Antonia, A. and Shah, D.A. (1987). 'Turbulent energy dissipation in a wake', Journal of Fluid Mechanics 179, pp 307-326 https://doi.org/10.1017/S002211208700154X
  2. Bruce, L. and McCartney, M., (1985). 'Floating breakwater design', Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol 111, No 2, pp 304-318 https://doi.org/10.1061/(ASCE)0733-950X(1985)111:2(304)
  3. Chakrabarti, S. (2001). 'Empirical calculation of roll damping of ships and barges', Ocean Engineering 28, pp 915-932 https://doi.org/10.1016/S0029-8018(00)00036-6
  4. Cozen. P.D. (1987). Numerical modeling of the roll damping of ships due to vortex shedding, Ph.D dissertation. London University, UK
  5. Dong, R.R., Katz, J. and Huang, T.T. (1997). 'On the structure of bow waves on a ship model', Journal of Fluid Mechanics 346, pp 77-115 https://doi.org/10.1017/S0022112097005946
  6. Fugazza, M. and Natale, L. (1988). 'Energy losses and floating breakwater response', Journal of Waterway, Port, Coastal, and Ocean Engineering, Vol 114, No 2, pp 191-205
  7. Ikeda, Y., Hemeno, Y. and Tanaka, N. (1977). 'On eddy making damping component of roll damping force on naked hull', Journal of the Society of Naval Architects of Japan 142, pp 54-64 (in Japanese)
  8. Jung, K.H., Chang, K.-A. and Huang, E.T. (2004). 'Two dimensional flow characteristics of wave interactions with a fixed rectangular structure', Ocean Engineering 31, pp 975-998 https://doi.org/10.1016/j.oceaneng.2003.12.002
  9. Lighthill, J. (1986). 'Fundamentals concerning wave loading on offshore structures', Journal of Fluid Mechanics 173, pp 667-681 https://doi.org/10.1017/S0022112086001313
  10. Mays, T.W., Plaut, R.H. and Liapis, S.L. (1999). 'Three-dimensional analysis of submerged, moored, horizontal, rigid cylinders used as breakwaters', Ocean Engineering 26, pp 1311-1333 https://doi.org/10.1016/S0029-8018(98)00065-1
  11. Pope, S.B. (2000). Turbulent Flows, Cambridge University Press
  12. Prasad, A.K., Adrian, R.J., Landreth, C.C. and Offutt, P.W. (1992). 'Effect of Resolution on the Speed and Accuracy of Particle Image Velocimetry Interrogations', Experiments in Fluids 13, pp 105-116 https://doi.org/10.1007/BF00218156
  13. Raffel, M., Willert, C.E. and Kompenhans, J. (1998). Particle Image Velocimetry, Springer-Verlag
  14. Roddier, D., Liao, S.-W. and Yeung, R.W. (2000). 'On freely-floating cylinders fitted with bilge keels', 10th International Offshore and Polar Engineering Conference, Seattle, USA, May 28-June 2
  15. Svendsen, I.A. (1987). 'Analysis of surf zone turbulence', Journal of Geophysical Research 92C, pp 5115-5124
  16. Tennekes, H. and Lumley, J.L. (1972). A First Course in Turbulence, MIT Press
  17. Townsend, A.A. (1956). The structure of turbulent shear flow, Cambridge University Press, London
  18. Williams, A.N. and Abul-Azm, A.G. (1997). 'Dual pontoon floating breakwater', Ocean Engineering 24, pp 465-478 https://doi.org/10.1016/S0029-8018(96)00024-8
  19. Williams, A.N., Lee, H.S., and Huang, Z. (2000). 'Floating pontoon breakwaters', Ocean Engineering 27, pp 221-240 https://doi.org/10.1016/S0029-8018(98)00056-0
  20. Yeung, R.W., Cermelli C. and Liao, S.-W. (1996). 'Vorticity Fields Due to Rolling Bodies in a Free Surface - Experiment and Theory', 21st Symposium on Naval Hydrodynamics, Trondheim, Norway
  21. Yeung, R.W. and Liao, S.-W. (1999). 'Time-Domain Solution of Freely Floating Cylinders in a Viscous Fluid', 9th International Offshore and Polar Engineering Conference, Brest, France, May 30-June 4
  22. Yeung, R.W., Liao, S.-W. and Roddier, D. (1998). 'Hydrodynamic Coefficients of Rolling Rectangular Cylinders', 8th International Journal of Offshore and Polar Engineers 8, pp 242-250