Print Email Facebook Twitter The influence of directional spreading on rogue waves triggered by abrupt depth transitions Title The influence of directional spreading on rogue waves triggered by abrupt depth transitions Author Tang, Tianning (University of Oxford) Moss, Charlotte (The University of Manchester) Draycott, Samuel (The University of Manchester) Bingham, Harry B. (Technical University of Denmark) van den Bremer, T.S. (TU Delft Environmental Fluid Mechanics; University of Oxford) Li, Yan (University of Bergen) Adcock, Thomas A.A. (University of Oxford) Date 2023 Abstract An increased number of rogue waves, relative to standard distributions, can be induced by unidirectional waves passing over abrupt decreases in water depth. We investigate this phenomenon in a more general setting of multidirectional waves. We examine the influence of the directionality on the occurrence probability of rogue waves using laboratory experiments and fully nonlinear potential flow simulations. Based on the analysis of the statistics of random waves, we find that directional spreading reduces the formation probability of rogue waves relative to unidirectional seas. Nevertheless, for typical values of directional spreading in the ocean (15∘–30∘), our numerical results suggest that there is still a significant enhancement to the number of rogue waves just beyond the top of a depth discontinuity. Subject surface gravity wavesnonlinear instability To reference this document use: http://resolver.tudelft.nl/uuid:3ce0a488-90ca-4462-a621-23300fa28bee DOI https://doi.org/10.1017/jfm.2023.737 ISSN 0022-1120 Source Journal of Fluid Mechanics, 972 Part of collection Institutional Repository Document type journal article Rights © 2023 Tianning Tang, Charlotte Moss, Samuel Draycott, Harry B. Bingham, T.S. van den Bremer, Yan Li, Thomas A.A. Adcock Files PDF the_influence_of_directio ... itions.pdf 1.02 MB Close viewer /islandora/object/uuid:3ce0a488-90ca-4462-a621-23300fa28bee/datastream/OBJ/view