Showing papers by "K. Murali published in 2006"

On the Prediction of Hydrodynamic Forces Acting on a Ship Moving at Constant Drift

Abstract: The effect of drift angle on a ship is investigated through towing tank tests and using Computational Fluid Dynamics (CFD). Resistance and wave elevations obtained from the computational study are validated with experimental results. Detailed free surface, mean velocity and pressure flow fields on the hull surface are obtained from the computational study for Fn ranging from 0.16 to 0.22 and for drift angle β = 0, 5 and 10°. The lateral force, yaw moment and asymmetric flow characteristics are brought out in the computational study.Copyright © 2006 by ASME

On the transient modelling of hydro-elastic interaction of gravity waves with an underwater elastic structure

Abstract: Fluid structure interaction (FSI) of offshore structures is an important area of research. The behaviour of offshore structures in Numerical Wave Tanks possessing FSI capabilities is of significant industrial value. In FSI problems, it is necessary to interactively solve and analyse both the structural and fluid dynamics as a coupled system, because the structural response and fluid loading are mutually dependent. We present a methodology for analysing a two-dimensional fluid-structure interaction problem in the time domain. The methodology is based on a nonlinear velocity potential formulation and linear elastic theory. The transient forces exerted by the fluid on the structure vary due to the elastic response of the structure. The dynamics of the free surface and the structure are also analysed for selected scenarios. We demonstrates that it is important to develop similar tools capable of solving such FSI problems in order to perform reliable and complete analysis leading to better and safer design.