Flow Analysis of Rolling Rectangular Barge in Beam Sea Condition Conference Paper uri icon


  • This paper presents laboratory observations of vortex generation and evolution process as regular waves passing a rectangular barge in a two dimensional wave tank. The test barge was mounted at the center of gravity by the hinge that allows the barge to roll only. Two regular waves with periods of 1.0 and 2.0 seconds, respectively, were selected for this study. Neither waves resulted in overtopping on deck. Spatial velocity field in water surrounding the barge and the roll responses of the barge were captured in PIV images for further process. The mean velocity field and its associated turbulence properties were reduced by averaging over sample PIV images recorded from repeated test runs based on phase averaging concept. The test results confirm that the vortex generation and evolution process can be clearly captured by the present technique. It is interesting to note that the size and trajectory of the vortices produced by waves of different period are remarkably different. The flow pattern and kinematic properties observed lead to a better understanding of the mechanism of eddy making and decay. This finding helps clarify near filed pressure distribution around a flat bottomed vessel and provide guideline to roll damping simulations.

published proceedings

  • Proceedings of the International Offshore and Polar Engineering Conference

author list (cited authors)

  • Jung, K. H., Chang, K. A., Chen, H. C., & Huang, E. T.

complete list of authors

  • Jung, KH||Chang, KA||Chen, HC||Huang, ET

publication date

  • December 2003