Numerical modeling of nonlinear surface waves caused by surface effect ships dynamics and kinematics

Document Type

Conference Proceeding

Date of Original Version



We model fully nonlinear free surface waves caused by a translating disturbance made of a pressure patch and/or a surface-piercing body (ship), within the framework of potential flow theory. The three-dimensional higher-order Boundary Element Model by Grilli et al. (2001) and Fochesato et al. (2004) is utilized with some recent extensions. In addition to the regular Eulerian-Lagrangian updating of the free surface geometry and potential, based on higher-order explicit Taylor series expansions, a pseudo-Lagrangian updating algorithm is developed to express and solve the problem in a coordinate system traveling at the instantaneous speed of the moving disturbance. This paper presents theoretical developments and applications illustrating both the accuracy and efficiency of the present method for a traveling pressure patch and an advancing Wigley hull. Based on numerical results, it is concluded that the present numerical approach, with a pseudo-Lagrangian updating and a higher-order BEM provides accurate and efficient results. Copyright © 2005 by The International Society of Offshore and Polar Engineers.

Publication Title

Proceedings of the International Offshore and Polar Engineering Conference