Odin Gramstad

TL;DR: Two independent, large scale experiments performed in two wave basins of different dimensions show that the probability of the formation of large amplitude waves strongly depends on the directional properties of the waves.

TL;DR: In this paper, a wave basin experiment has been performed in the MARINTEK laboratories, in one of the largest existing three-dimensional wave tanks in the world, to investigate the effects of directional energy distribution on the statistical properties of surface gravity waves.

TL;DR: In this article, numerical simulations of nonlinear waves have been compared in order to assess the ability of numerical models to describe the evolution of weakly nonlinear wave and predict the probability of occurrence of extreme waves within a variety of random directional wave fields.

TL;DR: In this paper, a large number of simulations have been performed to reveal how the occurrence of freak waves on deep water depends on the group and crest lengths for fixed steepness, and it is found that there is a sharp qualitative transition between short and long-crested sea, for a crest length of approximately ten wavelengths.

TL;DR: In this article, the modified nonlinear Schrodinger equations for deep water were brought into Hamiltonian form, with the action, momentum and Hamiltonian being conserved, starting from the Zakharov equation enhanced with the new kernel of Krasitskii.