Parametric mesh study: Lucy Ashton case

This study considers the ship Lucy Ashton, a benchmark case providing full-scale measurements of total ship resistance and boundary layer thickness. A series of CFD simulations was carried out for several different scales and Froude numbers, with the aim of reproducing experimental data on ship resistance and the boundary layer. The results showed agreement with the measurements, with ship resistance predictions within ±5% and realistic boundary layer profiles along the hull. Based on these findings, practical formulas for boundary layer thickness and base mesh cell size were derived. Although these formulas were developed considering only the Lucy Ashton case, they represent a promising basis for application to other ships, particularly at model scale. Further studies are recommended to confirm their reliability for different full-scale hull forms.