Author(s)

Y. Tahara & J. Longo

Abstract

Nonlinear free-surface flow around a yawed ship Y. Tahara & J. Longo The University of Iowa, Iowa City, ABSTRACT Nonlinear free-surface flow around a yawed ship in steady motion is analyzed by the boundary-element method. The solution is obtained by a distribution of singularities on the hull surface and on the undisturbed free surface. The total velocity potential is divided into two parts, i.e., the double-model lifting-flow potential and the free-surface-flow potential. The former is expressed by source and doublet distributions and determined with a Dirichlet-type boundary condition, while the latter is expressed by a simple Rankine-type singularity and determined with nonlinear boundary conditions applied on the free surface. An overview is given for the present approach and numerical results are presented for the Wigley hull, including comparisons between the linear and nonlinear solutions with available experimental data. INTRODUCTION An important factor in ship design

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