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Abstract

This paper introduces an automatic grid generation algorithm, based on a locally refined cut-cell method, to calculate ship resistance. Sharp edges and apexes are not accurately expressed in the cut-cell method, and the accuracy of the calculation in the turbulence boundary layer is lower than that of other body-fitted methods. In this study, an automatic mesh generation method is developed to effectively represent edge and apex, and a boundary layer grid generation algorithm is developed to generate meshes that improve the accuracy of ship resistance simulation. To validate the method, the resistances of the KRISO container ship and Japan bulk carrier are calculated using grids generated through the proposed method, and the results are compared with the existing experimental data. The results are qualitatively reasonable, and, therefore, the developed algorithms of the grid generation method can be applied to calculate the resistance of a ship.

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