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Parameterization of unresolved obstacles in wave modelling : a source term approach.

Abstract: In the present work we introduce two source terms for the parameterization of energy dissipation due to unresolved obstacles in spectral wave models. The proposed approach differs from the classical one based on spatial propagation schemes because it provides a local representation of phenomena such as unresolved wave energy dissipation. This source term-based approach presents the advantage of decoupling unresolved obstacles parameterization from the spatial propagation scheme, allowing not to reformulate, reimplement and revalidate the parameterization of unresolved obstacles for each propagation scheme. Furthermore it opens the way to parameterizations of other unresolved sheltering effects like rotation and redistribution of wave energy over frequencies. Proposed source terms estimate respectively local energy dissipation and shadow effect due to unresolved obstacles. Source terms validation through synthetic case studies has been carried out, showing their ability in reproducing wave dynamics comparable to those of high resolution mod- els. The analysis of high resolution stationary wave simulations may help to better diagnose and study the effects of unresolved obstacles, providing estimations of transparency coefficients for each spectral compo- nent and allowing to understand and model unresolved effects of rotation and redistribution of wave energy over frequencies.

 Fuente: Ocean Modelling, Volume 96, Part 1, December 2015, Pages 93–102

Editorial: Elsevier Ltd

 Año de publicación: 2015

Nº de páginas: 10

Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.ocemod.2015.05.004

ISSN: 1463-5003,1463-5011

Proyecto español: BIA2014-59643-R

Url de la publicación: http://dx.doi.org/10.1016/j.ocemod.2015.05.004