数式模型船シリーズの粘性流数値シミュレーション

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This paper describes a numerical method to calculate viscous flow around a ship hull based on the finite-volume concept. Three-dimensional time-averaged Navier-Stokes equation is solved by SIMPLE algorithm using the standard kε- turbulence model and a body fitted grid system. In order to verify the applicability of the method to the hull form design, numerical simulations of viscous flow are made on a series of mathematical ship models with various frame lines, and the calculated results are compared with corresponding experimental results. The comparisons between calculated and measured results reveal the following facts. (1) The present method is able to simulate longitudinal vorticies in the viscous flow field around a ship stern. (2) The present method is able to calculate the viscous effect on the hull surface pressure. (3) The present method is able to predict difference of the flow field and the hull surface pressure between the ship models with different frame lines. Some further numerical examinations, however, are necessary to obtain the quantitative accuracy for predicting the hull surface pressure and the flow field with strong longitudinal vorticies.
社団法人日本船舶海洋工学会の論文