Session: 08-06-01 non-presentations

Paper Number: 130091

130091 - Unsteady Ranse Simulation of the Added Resistance of the Kcs Ship in Short Regular Waves 

Added resistance in waves is a highly demanding research topic and has become one of the most focused research topics in maritime hydrodynamics, particularly in the past decade, driven by the demand of understanding better the ship performance in seaways, which is nowadays stringently regulated by the International Maritime Organization. Recent study highlighted that the added resistance in relatively short regular waves plays an important role in predicting the mean added resistance in seaways^[1-3]. However, the research in this direction is very challenging due to various restrictions on both experimental and numerical studies. Hence, the State-of-Art in this field needs heavy progress. In this study, the added resistance of the KCS ship in short regular head waves at Froude number Fr=0.26 is investigated numerically using CFD software. Fine/Marine HEXPRESS is used for generating a body-fitted full-hexahedral unstructured mesh in the computational domain and a fine mesh is adopted at the free surface to capture the free surface elevation accurately. The finite volume approach (FVM) is used to solve the Unsteady Reynolds-averaged Navier-Stokes equations (URANSE) with the k-ω shear stress transport turbulence (SST) model. The volume of fluid method (VOF) is used to determine the free surface. A numerical damping zone is applied to reduce the wave reflection at the boundaries. The details of ship flow characteristics such as free-surface elevation and pressure distribution are analyzed. The calculated results are compared with available experiment data. Simulations are considered for both free motion and fixed-body conditions. The added pressure distribution and its contour is illustrated to show visually which hull region contributes more significantly to the added resistance.

 

References:

1.     Guo B. and Steen S. (2010). Experiment on added resistance in short waves. Proc. Of 28th Symposium on Naval Hydrodynamics, Pasadena, California.

2.     Liu S.  and Papanikolaou A. (2017). On the Prediction of Added Resistance of Large Ships in Representative Seaways. Ships and Offshore Structures, Vol. 12(5), pp: 690-696.

3.     Liu S., Shang B., and Papanikolaou A. (2019). On the resistance and speed loss of full type ships in a seaway. Ship Technology Research, Vol. 66(3), pp: 161-179

Presenting Author: Paresh Halder Nanyang Technological University

Presenting Author Biography: Dr. Halder is a research fellow at the School of Mechanical and Aerospace Engineering, Nanyang Technological University. His research interest is in marine hydrodynamics.

Authors:

Paresh Halder Nanyang Technological University