Differences in the depth of water surface affect hydrodynamics ship so there is a possibility that will behave differently deep and shallow water. The flow generated by hull varies radically due to speed effects depth. At certain speed, experiences critical condition, which total resistance ship. This study examines Fridsma ship's differences at several speeds. Numerical computation used this s...

Abstract Interference effect between catamaran demi-hulls has been considered as an adverse fluid-solid interaction; the narrower separation distance two hulls, greater drag force acts upon catamaran. However, this study is aimed at introducing a novel phenomenon contrasting outcome in semi-planing and planing regimes. As speed accordingly Froude number increase transits across different modes,...

Planing vessels usually have low ratios of resistance to weight, so they can move fast on sea surface than the displacement or semi-displacement ships. Access to higher speeds is one of the attractions for designers and users. To achieve higher speeds, reducing the hydrodynamic resistance is a necessity for this class of vessels. In this study, a 3D finite volume approach is used to analyze the...

Experimental test is one of the methods for predicting drag ships using towing tank. This method has a good level accuracy but requires quite complex equipment and costs. With advancing technology computing, CFD emerged as an alternative problem-solving, especially in hydrodynamics analysis. study aims to ensure Computational Fluid dynamics (CFD) by verifying experimental data on high-speed ves...

Hard-chine boats are usually intended for high-speed regimes where they operate in the planing mode. These often designed to be relatively light, but there special applications that may occasionally require fast heavily loaded. In this study, steady-state hydrodynamic performance of nominal-weight and overloaded hard-chine hulls calm water is investigated with computational fluid dynamics solve...

This dissertation addresses the modeling, identification, and control of an automated planing vessel. To provide motion models for trajectory generation and to enable model-based control design for trajectory tracking, several experimentally identified models are compared over a wide range of speed and planing conditions for the Virginia Tech Ribcraft Unmanned Surface Vehicle. The modeling and ...