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Numerical Modeling of the Water Flow Around Ship Hulls

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A numerical method based on potential-flow theory using Rankine sources has been developed for the prediction of the flow past ship hulls. For purposes of validation, the method has been applied initially to the known analytical solution of flow past a sphere submerged in an infinite fluid. It was confirmed that a significant improvement could be obtained over the original method of Hess and Smith by projecting the collocation points back onto the actual surface of the sphere with additional smaller gains using submergence of the panels below the body surface. The method was then extended by the introduction of a free-water surface boundary condition and used to calculate the wave resistance of a Wigley hull for higher Froude numbers, up to 1.0. Raven's correction to Dawson's original formulation was included and evaluated. It was found that the correction made only a small difference to the calculated wave resistance. The results of the present work were seen to agree closely with experimental data for residual resistance up to a Froude number of approximately 0.65 but then give slightly lower values for higher Froude numbers. The difference was attributed primarily to the method of deducing the experimental values of the residual resistance from the total resistance where the frictional resistance had been based on the static wetted surface area.
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Document Type: Research Article

Publication date: June 1, 2001

More about this publication?
  • The Journal of Ship Research is a quarterly publication providing highly technical papers on applied research in hydrodynamics, propulsion, ship motions, structures, and vibrations. While the Journal requires that papers present the results of research that advances ship and ocean science and engineering, most contributions bear directly on other disciplines, such as civil and mechanical engineering, applied mathematics, and numerical analysis. High quality papers are contributed from the U.S., Canada and overseas, with representation from established authorities as well as new researchers.
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