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	Provedor de dados ArchiMer (4) Autor Cayocca, Florence (1) Gaurier, Benoit (1) Germain, Gregory (1) Kervella, Youen (1) Lalire, Maxime (1) Lesueur, Patrick (1) Pichot, Geraldine (1) Saulnier, Jean Baptiste (1) Mais... Palavra-chave Simulations numériques (4) Numerical simulations (3) Cohérence spatio temporelle (1) Contraintes de cisaillement (1) Courants marins (1) Densité spectrale (1) Dispersal (1) Dispersion (1) Ecologie spatiale (1) Essais expérimentaux (1) Finite Element Method (1) Fluid mechanics (1) Fluid/structure interactions (1) Formulations variationnelles (1) Gaussian processes (1) Groupement de vagues (1) Habitat modelling (1) Hydrodynamique côtière (1) Intéractions fluide/structure (1) Juvenile sea turtles (1) Mais... Tipo do documento Text (4) Ano 2017 (1) 2010 (1) 2009 (1) 2007 (1) País France (4) Idioma Francês (4)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 4 Primeira ... 1 ... Última STAMM : un modèle individu-centré de la dispersion active des tortues marines juvéniles. Applications aux cas des tortues luths du Pacifique Ouest et de l’Atlantique Nord-Ouest et aux tortues caouannes de l’ouest de l’océan Indien. ArchiMer Lalire, Maxime. Sea turtles are increasingly threatened by the direct and indirect effects of human activities. Their life cycle is complex, shared between various, and often very distant, habitats. Their conservation therefore requires identifying the habitats occupied at each stage of life and the migration routes between these different habitats. While the spatial ecology of adult turtles is relatively well known, particularly through satellite monitoring, the situation is not the same for juveniles which pelagic development phase remains largely unobserved. In that context, numerical simulation constitutes an appropriate tool to explore the dispersal of juvenile sea turtles from their natal beaches. Until now, simulations were mostly performed under the assumption... Tipo: Text Palavras-chave: Courants marins; Dispersion; Ecologie spatiale; Modélisation lagrangienne; Modèles de mouvement; Modèles d'habitat; Simulations numériques; Tortues marines juvéniles; Tortue luth; Tortue caouanne; Oceanic currents; Dispersal; Spatial ecology; Lagrangian modelling; Movement modelling; Habitat modelling; Numerical simulations; Juvenile sea turtles; Leatherback turtle; Loggerhead turtle.. Ano: 2017 URL: https://archimer.ifremer.fr/doc/00497/60912/64263.pdf Modélisation et analyse numérique du couplage filet-écoulement hydrodynamique dans une poche de chalut ArchiMer Pichot, Geraldine. We are interested in the numerical simulation of the catch process at the end part of a trawl. The study of previous works emphasizes the lack of a convincing flow model. The need of a physical understanding of the flow leads us to perform experimental campaigns around a rigid cod-end net model, whose results are given in the manuscript. We propose a model based on the Navier-Stokes/Brinkman equations coupled to an equation for the turbulent kinetic energy by the means of an eddy viscosity, with appropriate boundary conditions. Existence of a weak solution to our coupled problem is proved in dimension 2. Then, we present the axisymmetric code we developed, called SeaNet. We set the parameters of the model and validate the code by comparison with the... Tipo: Text Palavras-chave: Finite Element Method; Numerical simulations; Variational formulations; Modelling; Fluid/structure interactions; Turbulence; Fluid mechanics; Selectivity of fishing gear; Méthode des éléments finis; Simulations numériques; Formulations variationnelles; Modélisation; Intéractions fluide/structure; Turbulence; Mécanique des fluides; Sélectivité des engins de pêche. Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/these-3350.pdf Climatologie fine des systèmes de vagues pour l'étude des systèmes houlomoteurs ArchiMer Saulnier, Jean Baptiste. This work focuses on the refinement of sea-states spectral characterisation in the frame of the development of wave energy converters (WECs). Until now, this characterisation has been limited to the consideration of basic global parameters such as the significant wave height and mean wave period. The present work namely underlines - thanks to simplified numerical models - that such a description is not sufficient to account for the performance of WECs, for they still exhibit a large variability in terms of mean production while wave energy and period are fixed. It is therefore needed to refine this description by introducing new wave characteristics, such as the wave groupiness, which is itself related to the sea-state's spectral bandwidth. The classical -... Tipo: Text Palavras-chave: Modèles stochastiques; Processus gaussiens; Simulations numériques; Cohérence spatio temporelle; Systèmes de vagues; Densité spectrale; État de mer; Largeur spectrale; Groupement de vagues; Systèmes houlomoteurs; Énergie des vagues; Stochastic models; Gaussian processes; Numerical simulations; Spatiotemporal coherence; Wave system; Spectral density; Sea state; Spectral bandwidth; Wave groupiness; WECs; Wave energy. Ano: 2009 URL: http://archimer.ifremer.fr/doc/2009/these-7414.pdf Caractérisation numérique et expérimentale des perturbations engendrées par la présence de tables ostréicoles ArchiMer Kervella, Youen; Germain, Gregory; Gaurier, Benoit; Cayocca, Florence; Lesueur, Patrick. Sur de nombreux sites ostréicoles, d’importants mouvements sédimentaires modifient les conditions d’exploitation. Les mouvements naturels sont modifiés par la présence des tables à huîtres, les phénomènes en jeu étant de deux ordres : la perturbation des courants de marée et la modification des conditions de houle. Nous présentons dans ce document la méthodologie mise en place pour améliorer la compréhension des perturbations physiques du milieu engendrées par l’implantation de tables ostréicoles et caractériser les modifications de l’écoulement. Les résultats obtenus, tant expérimentaux que numériques, sont présentés et les développements pour une extension du modèle à l’échelle d’un parc ostréicole sont discutés. Des essais expérimentaux réalisés à... Tipo: Text Palavras-chave: Mesures LDV; Essais expérimentaux; Simulations numériques; Contraintes de cisaillement; Hydrodynamique côtière; Table ostréicole. Ano: 2010 URL: http://archimer.ifremer.fr/doc/00011/12263/9044.pdf Registros recuperados: 4 Primeira ... 1 ... Última

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