NUMERICAL SIMULATION OF SHIP WAVES AND SOME DISCUSSION ON BOW WAVE BREAKING & VISCOUS INTERACTIONS OF STERN WAVE

Numerical calculations were carried out to simulate the free-surface flows around the Wigley model and S-103 Inuid model. The N-S equation was solved by a finite difference method where the body-fitted co-ordinate system, the wall function and the triple-grid system were invoked. The numerical scheme was examined for the scheme to be acceptable for discussion, the calculations were extended to the turbulent high-Reynolds number flows with the aid of the O-equation model to discuss the Reynolds number dependency of the waves. The wave elevation at the Reynolds number of 104 was much less than the 106 although the Froude number was the same. The numerical results predicted the appearance of the sub-breaking waves around bow and stern. The prediction was qualitatively supported by the experimental observation. They were also applied to study the stern flow of S-103, to which extensive experimental data are available. Although the interaction between the separation and the stern wave generation is not yet clear, the effects of the bow wave on the developments of the boundary layer flows are concluded to be significant. The sub-breaking of the stern wave is also discussed.