Time-domain simulation of large amplitude ship roll motions by a chimera RANS method Conference Paper

abstract

• A Reynolds-Averaged Navier-Stokes (RANS) numerical method has been employed in conjunction with a chimera domain decomposition approach for time-domain simulation of large amplitude ship roll motions. For the simulation of arbitrary roll motions, it is convenient to construct body-fitted numerical grids for the ship and ambient flow domain separately. The ship grid block is allowed to roll with respect to its center of rotation under either forced or free roll conditions. The roll moments are computed every time step by a direct integration of the hull surface pressure and shear stresses obtained from the chimera RANS method. The simulations for prescribed roll motions of a full-scale motor vessel clearly show that the bilge keels at the mid-ship produced large roll damping but generated very little waves. On the other hand, the ship skag acts like a wavemaker during the roll motion and produced large wakes in the stern region. Time-domain simulations were also performed for a free- floating pontoon barg e in free decay motions and under large amplitude incident waves. The simulation results successfully predicted the roll resonance when the incident wave coincides with the free decay period of the barge.

authors

• Chen, Hamn-Ching

published proceedings

• PROCEEDINGS OF THE ELEVENTH (2001) INTERNATIONAL OFFSHORE AND POLAR ENGINEERING CONFERENCE, VOL III

author list (cited authors)

• Chen, H. C., Liu, T. J., & Huang, E. T.

complete list of authors

• Chen, HC||Liu, TJ||Huang, ET

publication date

• January 2001

published in

• Proceedings of the International Offshore and Polar Engineering Conference  Journal

keywords

• Chimera Domain Decomposition
• Free Decay Simulation
• Incident Waves
• Navier-stokes Equations
• Ship Roll Motion
• Turbulent Flow

International Standard Book Number (ISBN) 10

• 1-880653-54-0

start page

• 299

end page

• 306

volume

• 3