TITLE:
Numerical Hydrodynamic of Multihull Tunnel Vessel
AUTHORS:
Morteza Ghassabzadeh, Hassan Ghassemi
KEYWORDS:
Multi-Hull; Tunnel Vessel; Hydrodynamic Simulations; Finite Volume Method
JOURNAL NAME:
Open Journal of Fluid Dynamics,
Vol.3 No.3,
September
18,
2013
ABSTRACT:
The research described in this paper was carried out to predict the
numerical hydrodynamic of multihull tunnel vessel at various speeds. The hull form of
vessel is fairly generated by the tunnel hull form generator (THFG) code using
the Non Uniform Rational B-Spline (NURBS) method. Then, the hydrodynamic
simulation of high speed vessel is carried out based on finite volume
discretization method using volume of fluid (VOF) model to consider free surface
between water and air phases around the vessel. A dynamic
mesh restructuring method is applied for grid generation regarding to the heave
and pitch motions of vessel in each time step. Calculated drag and trim angles
at various speeds are in good agreement with experimental data. More results are carried out at the speed 15 knots to understand the
convergency of the pitch and heave motions.