Reference : Dissection of the GHER turbulence closure scheme

	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Multidisciplinary, general & others Physical, chemical, mathematical & earth Sciences : Earth sciences & physical geography Life sciences : Aquatic sciences & oceanology
	To cite this reference:	http://hdl.handle.net/2268/2850

Title :	Dissection of the GHER turbulence closure scheme
Language :	English
Author, co-author :	Delhez, Eric [Université de Liège - ULg > Département d'aérospatiale et mécanique > Mathématiques générales >]
	Grégoire, Marilaure [Université de Liège - ULg > Département des sciences et gestion de l'environnement > Océanologie >]
	Nihoul, Jacques [Université de Liège - ULg > Services généraux (Faculté des sciences) > Relations académiques et scientifiques (Sciences) >]
	Beckers, Jean-Marie [Université de Liège - ULg > Département d'astrophys., géophysique et océanographie (AGO) > Océanographie physique >]
Publication date :	1999
Journal title :	Journal of Marine Systems
Publisher :	Elsevier Science
Volume :	21
Issue/season :	1-4
Pages :	379-397
Audience :	International
ISSN :	0924-7963
City :	Amsterdam
Country :	The Netherlands
Keywords :	[en] 3D hydrodynamic model ; North Sea ; Mediterranean Sea ; turbulence closure scheme
Abstract :	[en] In this paper, the turbulence closure scheme implemented in the GHER hydrodynamic model is described in detail. Two case studies carried out in two contrasting conditions-one in the shallow, tide dominated, north-western European continental shelf, and the other in the deep Mediterranean Sea-are used to identify the dominant terms of the equation for the turbulent kinetic energy, first theoretically, secondly from the results of the simulations. In both domains, the dominant terms are the local destruction and production terms, the vertical diffusion term and to a smaller degree, the time derivative. Advection and horizontal diffusion turn out to be negligible in most of the relevant cases for such large scale studies. This opens the way to simplifications and optimisations of the numerical models. (C) 1999 Elsevier Science B.V. All rights reserved.
Permalink :	http://hdl.handle.net/2268/2850

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