Numerical simulation of added resistance in head waves for a container ship
Journal
Journal of Taiwan Society of Naval Architects and Marine Engineers
Journal Volume
32
Journal Issue
1
Pages
23-34
Date Issued
2013
Author(s)
Abstract
The purpose of the seakeeping model test is to predict motion response which is important to estimate the safety and comfort indices in real sea operation. Although sea margin and waves and motions are closely related, a rough calculation of the former by empirical formula is typically sufficient. The goal of this paper is to test and demonstrate the capabilities of Reynolds-averaged Navier-Stokes equations (RANS) solver to evaluate added resistance in head waves with forward ship speed. The geometry of a real 1,700 TEU container ship was modeled. The bare hull resistance was first computed and verified with experimental data. To simulate regular waves, boundary conditions were set by the airy wave equation. Then the heave and pitch motions of the hull were simulated by applying the arbitrary Lagrangian-Eulerian (ALE) technique. The mean added resistance coefficients were carried out and applied to whole-year sea state statistics from the Taiwan Strait. Results showed that the motion responses were consistent with experiments while the sea margin of 20% was found to be overestimated than experimental prediction and potential theory but still lies within empirical estimation.
Subjects
Added resistances
Arbitrary Lagrangian Eulerian
Container ships
Empirical estimations
Empirical formulas
Experimental datum
Potential theory
Reynolds averaged Navier-Stokes equation
Computational fluid dynamics
Navier Stokes equations
Ocean currents
Seakeeping
Seismic waves
Containers
Type
journal article