Strongly Nonlinear Phenomena in Ship Hydrodynamics

Abstract

This paper was presented as the 2003–2004 Georg Weinblum Memorial Lecture by Dr. Maurizio Landrini of Istituto Nazionale per Studied Esperienze di Architettura Navale (INSEAN, the Italian Ship Model Basin). Tragically, Maurizio was killed in an accident on June 26, 2003, before he could give the lecture. The lecture was presented in memoriam by Dr. Emilio F. Campana, a friend and colleague at INSEAN. The paper was finished by coresearchers and friends at INSEAN. The present paper is focused on the analysis of nonlinear phenomena in the naval context. The work is split into two parts. In the former, state-of-the-art numerical techniques handling nonlinear free-surface flows are analyzed. Related advantages and shortcomings are discussed through mutual verifications and comparisons with experiments for prototype cases. In the latter, practical problems relevant for ship hydrodynamics, where nonlinear phenomena play a major role, are studied. More in detail, water-on-deck, sloshing, and bow and stern ship breaking wave phenomena are attacked by means of both numerical and experimental techniques, and the main features connected with nonlinear mechanisms are identified.