Computation of Ship Viscous Flow at Full Scale Reynolds Number : Consideration of Near-Wall Flow Model Including Surface Roughness Effects

概要

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The present study concerns simulation of ship viscous flow at full-scale Reynolds number. The main objectives are two folds : (1) development of Reynolds-averaged Navier-Stokes equation method applicable to full-scale flow simulation ; and (2) investigation on appropriate physical model for full-scale Reynolds number in conjunction with consideration of near-wall flow model including surface roughness effects. In particular, the validity and advantage of two-point wall-function approach have been investigated and the extension was made for inclusion of surface roughness effects on flow and resistance : and currently, evaluation for roughness effects on flat plate flow has been completed. The present numerical method for full-scale flow simulation is based on extension of method developed by the present author, such that, in association with standard k-ε model, two near-wall models can be employed, i.e., two-layer method and two-point wall-function method ; where the latter has been shown more suitable in practical design use.
社団法人日本船舶海洋工学会の論文