STUDY OF FROUDE AND HUGHES METHODS BY NUMERICAL TOWING TANK

Abstract

The resistance of a cargo ship is calculated by numerical towing tank. RANSE multi-phase parallel solver with K-Z SST
turbulent model and VOF formulation is applied. Computational results from double model (without free surface) are
used to obtain 1+k in Hughes’ method and those with free surface are analyzed by both Froude and Hughes’ approaches
to investigate model and full scale correlation. ITTC recommended uncertainty study is carried out to evaluate numerical
error due to grid density. The computed wave elevation, wake distribution and resistance components by fine, medium
and coarse meshes are cross-compared and validated against experiment data where applicable. It is found that grid
resolution has most effect on wave pattern. The predicted friction and viscous-pressure resistance coefficients are
relatively grid independent from present numerical simulation.