A LARGE-DOMAIN APPROACH FOR CALCULATING SHIP BOUNDARY-LAYERS AND WAKES AND WAVE-FIELDS FOR NONZERO FROUDE-NUMBER

A large-domain approach is developed for calculating ship boundary lay ers and wakes and wave fields for nonzero Froude number. The Reynolds- averaged Navier-Stokes and continuity equations are solved with the Ba ldwin-Lomax turbulence model, exact nonlinear kinematic and approximat e dynamic free-surface boundary conditions, and a body/free-surface co nforming grid. The results are validated through comparisons with data for the Series 60 C-B = 0.6 ship model at low and high Froude numbers and results of a precursory interactive approach. Both approaches yie ld satisfactory results; however, the large-domain results indicate im proved resolution of the flow close to the hull and wake centerplane a nd of the Froude number differences due to near-wall turbulence modeli ng and nonlinear free-surface boundary conditions. Additional evaluati on is provided through discussion of the recent CFD Workshop Tokyo 199 4, where both methods were among the best. Last, some concluding remar ks are made. (C) 1996 Academic Press, Inc.