Results 51 to 60 of about 2,815 (152)

A numerical study of the longitudinal thermoconvective rolls in a mixed convection flow in a horizontal channel with a free surface

open access: yes, 2012
This paper presents a numerical study of three-dimensional laminar mixed convection within a liquid flowing on a horizontal channel heated uniformly from below. The upper surface is free and assumed to be flat.
Bammou, Lahcen   +5 more
core   +1 more source

Detection of periodic signatures in the solar power spectrum. On the track of l=1 gravity modes [PDF]

open access: yes, 2006
In the present work we show robust indications of the existence of g modes in the Sun using 10 years of GOLF data. The present analysis is based on the exploitation of the collective properties of the predicted low-frequency (25 to 140 microHz) g modes ...
Ballot, J.   +7 more
core   +1 more source

Exploring the impact of CMIP5 model biases on the simulation of North Atlantic decadal variability [PDF]

open access: yes, 2015
Instrumental observations, palaeo-proxies, and climate models suggest significant decadal variability within the North Atlantic subpolar gyre (NASPG).
Alvarez-Garcia   +44 more
core   +1 more source

Macroscopic Model of Solid Oxide Fuel Cell Stack for Integrating in a Generator Simulation

open access: yes, 2006
International audienceThis paper presents a macroscopic model of solid oxide fuel cell (SOFC) with the aim to perform a simulation of the whole generator. Three sub-models have been developed to take into fluidic, thermal and electrical phenomena.
Chnani, Moussa   +3 more
core   +3 more sources

Étude théorique d'ondes De Rossby thermiques non linéaires en géométrie sphérique: influence du mode de chauffage [PDF]

open access: yes, 2007
Thermal Rossby waves appear by thermoconvective instabilities in the liquid core of rotating planets. Our study, which uses 2D quasigeostrophic models and 3D models, the latters being used to validate the formers, shows that the heating mode, internal ...
Busse, Friedrich   +3 more
core  

Targeted mixing in an array of alternating vortices [PDF]

open access: yes, 2007
Transport and mixing properties of passive particles advected by an array of vortices are investigated. Starting from the integrable case, it is shown that a special class of perturbations allows one to preserve separatrices which act as effective ...
A. Crisanti   +12 more
core   +3 more sources

Formulations mathématiques et résolution numérique en mécanique [PDF]

open access: yes, 2004
INTRODUCTION GÉNÉRALEI - APPROXIMATION PAR RÉSIDUS PONDÉRÉS ET ÉLÉMENTS FINIS1 Théorie algébrique des milieux continus2 Méthode des résidus pondérés3 Méthode des éléments finis de type déplacementsII - ÉQUATIONS INTÉGRALES4 Principe et champs d ...
Lecointe, Yves   +2 more
core   +1 more source

Effet thermocapillaire sur la convection mixte en canal ouvert

open access: yes, 2011
L'écoulement laminaire tridimensionnel de convection mixte d'un liquide dans un canal horizontal chauffé uniformément par le bas et dont la surface supérieure est libre est étudié numériquement en prenant en compte les effets de thermocapillarité (effet Marangoni).
Bammou, Lahcen   +4 more
openaire   +1 more source

Développement d'un code éléments finis pour simuler le soudage par ultrasons de matériaux composites = Development of a Finite element code for simulating the ultrasonic welding of composite materials [PDF]

open access: yes, 2009
National audienceLe développement récent des matériaux composites à matrices thermoplastiques c'est accompagné de nouveaux moyens d'assemblages. Nous nous concentrons ici sur le soudage par ultrasons. Afin d'étudier l'influence des paramètres procédé sur
Chevaugeon, Nicolas   +3 more
core   +1 more source

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