Relevant bibliographies by topics / Formulations mixtes

Contents

  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters
  5. Conference papers
  6. Reports

Academic literature on the topic 'Formulations mixtes'

Author: Grafiati
Published: 4 June 2021
Last updated: 7 February 2022

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Journal articles on the topic "Formulations mixtes"

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Achchab, Boujemâa, and Abdellatif AGOUZAL. "Formulations Mixtes Augmentées et Applications." ESAIM: Mathematical Modelling and Numerical Analysis 33, no. 3 (May 1999): 459–78. http://dx.doi.org/10.1051/m2an:1999147.

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Bouillault, F., Z. Ren, and A. Razek. "Modélisation tridimensionnelle des courants de Foucault à l'aide de méthodes mixtes avec différentes formulations." Revue de Physique Appliquée 25, no. 7 (1990): 583–92. http://dx.doi.org/10.1051/rphysap:01990002507058300.

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Khadimallah, Amine, Wiem Ben Hasine, Hedi Hassis, and Abdelwahed Ben Hamida. "Formulation « dissociée » des poutres mixtes." Revue Française de Génie Civil 8, no. 4 (May 2004): 439–55. http://dx.doi.org/10.1080/12795119.2004.9692614.

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Bartels, David W., William D. Hutchison, Vincent A. Fritz, and George R. Klacan. "Effect of Bacillus thuringiensis Application Interval on European Corn Borer (Lepidoptera: Pyralidae) Control in Sweet Corn." Journal of Entomological Science 30, no. 3 (July 1, 1995): 374–89. http://dx.doi.org/10.18474/0749-8004-30.3.374.

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Ground-applied treatments of two commercial Bacillus thuringiensis subsp. kurstaki formulations (MVP and Dipel ES) and tank-mixes with a pyrethroid (Ambush 2E) were evaluated for control of European corn borer, Ostrinia nubilalis (Hübner), larvae in sweet corn. Treatments were applied at average intervals of 3.4, 5, 7, and 10 days to determine field persistence. Manual infestations of first-instar O. nubilalis were used to augment natural populations. During both years, there were no significant interactions between application interval and treatment for all dependent variables tested, including late instars per ear, percent marketability, yield, and predator density. Regardless of application interval, MVP provided greater larval control than Dipel ES. However, the decline in efficacy of the encapsulated MVP formulation occurred at the same rate as that of the non-encapsulated Dipel ES formulation over the 3.4 to 10-d intervals. Tank-mixes of B. thuringiensis + low-rate permethrin provided no additional control compared with low-rate permethrin alone. Given the infestation levels present in this test, neither B. thuringiensis formulation provided control sufficient to maintain current processor standards of 5–10% infested ears at harvest.
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AHMADZADEH GHAVIDEL, Reihaneh, and Jamuna PRAKASH. "Composite Weaning Mixes: Formulation and Quality Characteristics." Food Science and Technology Research 16, no. 1 (2010): 65–70. http://dx.doi.org/10.3136/fstr.16.65.

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Meliashchenia, A. V., and I. V. Kaltovich. "Development of formulations for emulsions and dry mixes for production of semi-finished products using additive technologies." Proceedings of the National Academy of Sciences of Belarus. Agrarian Series 58, no. 1 (February 10, 2020): 116–26. http://dx.doi.org/10.29235/1817-7204-2020-58-1-116-126.

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Study of possibilities of using various types of raw materials as fillers for food 3D printers is relevant for development of additive technologies in the field of food production. Currently, the properties are studied to the greatest extent and the ingredients are widely used for confectionery production in the world and, at the same time, the process properties of raw materials of animal origin, in particular meat raw material, as one of the main sources of protein are of greater interest. Process capabilities of meat raw material were studied for this purpose for formulating emulsions or mixtures suitable for use as a raw material for food 3D printer. Formulations of emulsions and dry mixes are developed based on broiler chicken meat, as well as combinations of broiler chicken meat and pork, pork and beef (ratio 1 : 1) for manufacture of semi-finished products, as well as production technologies. It was determined that it is advisable to add structure-forming components to formulations of emulsions in a dry form, which provides improved functional-and-process and structural-and-mechanical indicators in comparison with hydrated and gel forms. It was determined that 15% of hydrolyzed connective tissue or 10 % of hydrolyzed pork skin can reduce the level of structure-forming components in emulsion formulations, and also has a positive effect on reducing the cost price of emulsions while maintaining rational functional-and-process and structural-and-mechanical parameters. It has been revealed that adding 6-12 % of WPS-UF-80, 5-10 % of dry whey or 4-8 % of fat free milk powder into emulsion formulations allows reducing the level of structure-forming ingredients in the formulations. These mixtures and emulsions used as raw materials for food 3D printers will ensure production of innovative group of meat products using additive technologies in the Republic of Belarus.
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Usharani R and Lakshmi U K. "Formulation and Evaluation of Functional food Health mixes." International Journal of Research in Pharmaceutical Sciences 11, no. 3 (July 28, 2020): 4347–52. http://dx.doi.org/10.26452/ijrps.v11i3.2651.

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Over the last few consumer’s interest in health and functional foods has increased considerably in industrialized countries thus offering an opportunity for sector to add value to agricultural commodities. Today the world appears to be increasingly interested in the health benefits of foods and have begun to look beyond their basic nutritional benefits to prevention of disease and health enhancement. Traditional systems of medicine owe their significance to the components that have their origin in plant sources and most of them were associated with routine food habits. Functional food is any fresh or processed food claimed to have a health-promoting or disease-preventing property beyond the basic function of supply of nutrients. functional food is any food or food ingredient that provides health benefit beyond the traditional nutrients it contains. Food supplementation is one of the effective ways of improving the health status of weavers by means of increasing the serum calcium level, regulating the blood glucose and blood pressure. Keeping all these points in mind the investigator selected low cost, locally available ingredients and foods familiar to the community to formulate food supplements to manage diseases like diabetes, hypertension and disorders. The functional foods are , flax seeds, , blue berry, carrot, vegetables, fish, garlic, whole grams, oats, oranges, spinach etc. The present study was carried out to formulate and preparation of health mixes, assess the nutrient content of health mixes, analysis of anti nutritional factors of health mixes. Overall findings revealed the functional food health mixes are reduced the risk of CVD, Diabetes , hypertension, cancer and osteoporosis.
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Ferchichi, Hanen, and Saloua Mani Aouadi. "Stabilité numérique d'une formulation mixte pour les coques." Comptes Rendus Mathematique 346, no. 19-20 (October 2008): 1103–8. http://dx.doi.org/10.1016/j.crma.2008.09.007.

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Howlett, Michael, and Jeremy Rayner. "Patching vs Packaging in Policy Formulation: Assessing Policy Portfolio Design." Politics and Governance 1, no. 2 (October 14, 2013): 170–82. http://dx.doi.org/10.17645/pag.v1i2.95.

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Thinking about policy mixes is at the forefront of current research work in the policy sciences and raises many significant questions with respect to policy tools and instruments, processes of policy formulation, and the evolution of tool choices over time. Not least among these is how to assess the potential for multiple policy tools to achieve policy goals in an efficient and effective way. Previous conceptual work on policy mixes has highlighted evaluative criteria such as "consistency" (the ability of multiple policy tools to reinforce rather than undermine each other in the pursuit of individual policy goals), "coherence" (or the ability of multiple policy goals to co-exist with each other in a logical fashion), and "congruence" (or the ability of multiple goals and instruments to work together in a uni-directional or mutually supportive fashion) as important design principles and measures of optimality in policy mixes. And previous empirical work on the evolution of existing policy mixes has highlighted how these three criteria are often lacking in mixes which have evolved over time as well as those which have otherwise been consciously designed. This article revisits this early design work in order to more clearly assess the reasons why many existing policy mixes are sub-optimal and the consequences this has for thinking about policy formulation processes and the practices of policy design.
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Aranda-Gonzalez, Irma, Maribel Perera-Pacheco, Enrique Barbosa-Martín, and David Betancur-Ancona. "Replacing sugar with S. rebaudiana extracts on the physicochemical and sensory properties of strawberry ice cream." Ciência Rural 46, no. 4 (April 2016): 604–9. http://dx.doi.org/10.1590/0103-8478cr20150505.

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ABSTRACT: Ice cream is a product whose formulation requires considerable amounts of sugar. In addition to providing flavor, sugar contributes to the physicochemical characteristics of ice cream but its consumption in large quantities is related to chronic diseases such as diabetes and obesity. For this reason, the food industry seeks to formulate products with sweeteners that preserve the physicochemical and sensory characteristics of the original product. Stevia rebaudiana is a plant that naturally contains glycosides with no calories and high sweetening capacity and it is considered safe for consumption. Therefore the aim of this research was to evaluate the effect of replacing sugar with different levels of extracts of S. rebaudiana Morita II and Criolla, on the physicochemical and sensory properties of strawberry ice cream. Using a 2x2 factorial experimental design, a total of 4 formulations were prepared with two levels of concentration of the aqueous extract of Stevia rebaudiana (5 or 8%) and the variety of S. rebaudiana (Morita II or Criolla). Proximate composition, physicochemical properties and sensory evaluation were determined in processed products. The proximate analysis of strawberry ice cream varied significantly (P<0.05) depending of variety and level used on the formulation. The viscosities of all ice cream mixes were decreasing as the shear rate was increased, indicating a pseudoplastic behavior. The sensory analysis showed differences (P<0.05) among the formulations tested, however the score of all products were above the indifference point, suggesting that all of these formulations may have a commercial potential.
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Dissertations / Theses on the topic "Formulations mixtes"

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Schneider, Didier. "Eléments finis mixtes duaux pour la résolution numérique de l'équation de la diffusion neutronique en géométrie hexagonale." Paris 6, 2000. http://www.theses.fr/2000PA066432.

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Capatina, Daniela. "Analyse de méthodes mixtes d'éléments finis en mécanique." Habilitation à diriger des recherches, Université de Pau et des Pays de l'Adour, 2011. http://tel.archives-ouvertes.fr/tel-00647026.

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Les travaux de recherche de cette habilitation se situent dans le domaine de l'Analyse Numérique des Equations aux Dérivées Partielles et portent sur la modélisation, la discrétisation, l'analyse a priori et a posteriori de schémas et la simulation numérique de différents problèmes issus de la mécanique. Un fil conducteur de ces travaux est l'utilisation et l'étude des méthodes d'éléments finis (conformes, non-conformes, mixtes, de Galerkin discontinus, stabilisés) et des formulations mixtes. Les domaines d'application abordés sont la mécanique des solides élastiques, l'ingénierie pétrolière et la mécanique des fluides, newtoniens et non-newtoniens. Ainsi, des problèmes d'élasticité linéaire, comme la discrétisation de deux modèles de plaque mince en flexion munie de conditions aux limites physiques, ont été considérés. Des écoulements anisothermes dans les milieux poreux, décrits par les équations de Darcy-Forchheimer avec un bilan d'énergie exhaustif dans les cas mono et multi-phasique, ainsi qu'un couplage thermo-mécanique puits - réservoir pétrolier ont aussi été étudiés, dans le cadre d'une collaboration industrielle avec Total. Enfin, plusieurs questions en mécanique des fluides ont été abordées, comme la discrétisation robuste des équations de Stokes par une méthode de Galerkin discontinue en lien avec les éléments finis non-conformes, le traitement des conditions aux limites non-standard pour les équations de Navier-Stokes, la modélisation hiérarchique multi-dimensionnelle des écoulements fluviaux à surface libre, la simulation réaliste des écoulements de liquides polymères et la stabilité des schémas numériques par rapport aux paramètres physiques, en particulier pour le modèle de Giesekus.
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Menad, Mohamed. "Formulations mixtes hybrides pour le problème de la magnétostatique dans R³ obtenues en couplant une méthode d'éléments finis conforme avec une méthode intégrale." Phd thesis, Université de Cergy Pontoise, 2005. http://tel.archives-ouvertes.fr/tel-00012099.

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L'objet de cette thèse est d'étudier un problème de la magnétostatique tridimensionnel. On propose trois formulations mixtes couplant une méthode d'éléments finis pour tenir compte du milieu hétérogène et une méthode éléments de frontière pour le milieu extérieur homogène. Pour la méthode intégrale on a utilisé les équations de Calderon, l'opérateur de Neumann-Dirichlet ou d'autres opérateurs intégraux. L'utilisation des éléments d'arête de Nédélec pour le champ magnétique, et les éléments de face de Raviart pour l'induction magnétique permet d'utiliser des méthodes éléments finis conformes. Des résultats numériques ont permis de valider ces méthodes. La deuxième partie a porté sur la comparaison de diverses discrétisations pour l'opérateur de Poincaré-Steklov. Ces méthodes ont été comparées sur une formulation de la magnétostatique. Enfin, on propose des formulations discontinues du problème de la magnétostatique avec des conditions aux limites. On montre que ces formulations sont consistantes et des estimations d'erreur sont obtenues.
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Menad, Mohamed Rugh Hans-Henrik. "Formulations mixtes hybrides pour le problème de la magnétostatique dans R³ obtenues en couplant une méthode d'éléments finis conforme avec une méthode intégrale." [s.l.] : [s.n.], 2006. http://biblioweb.u-cergy.fr/theses/05CERG0230.pdf.

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Nduwayo, Placide. "Formulations mathématiques et algorithmes pour le problème d'affectation des quais du cross-dock." Thesis, Valenciennes, Université Polytechnique Hauts-de-France, 2020. http://www.theses.fr/2020UPHF0013.

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Le cross-docking est une stratégie utilisée pour optimiser les opérations à l’intérieur de l’entrepôtdans le cadre de l’optimisation de la chaine logistique . Comme pour les entrepôts traditionnels,les produits sont collectés depuis plusieurs origines de production tels que les fournisseurs,les usines, les fabricants, etc., par des camions, puis ils sont acheminés vers des plateformes appeléescross-docks. Arrivés au cross-dock, les produits sont d’abord déchargés sur des quais d’entréedu cross-dock. Ils sont ensuite triés selon leurs destinations et sont immédiatement transférés,à l’aide des matériels de manutention, vers des quais de sortie correspondants pour, quelquesfois être consolidés avec d’autres produits allant à la même destination et sont rechargés dansdes camions sortants. Contrairement aux entrepôts traditionnels où la durée de stockage desproduits est indéfinie, pour le cross-dock, ils sont déchargés et rechargés le même jour sans attendredans la zone de stockage temporaire, ou peuvent attendre moins d’un jour. Dans cettethèse, nous étudions le problème d’optimisation NP-difficile apparaissant dans le cross-dock appelé“Cross-dock Door Assignment Problem (CDAP)”. Le CDAP consiste à affecter des camionsentrants et sortants, respectivement aux quais d’entrée et de sortie du cross-dock. Le but estde minimiser le coût total de transport à l’intérieur du cross-dock. La formulation quadratiquestandard du CDAP inclut le problème d’affectation généralisée comme sous-problème. Dans cettethèse, nous effectuons une revue de littérature étendue du cross-docking. Nous nous concentronsensuite sur la modélisation mathématique du CDAP via une formulation quadratique standard,ainsi que sur la linéarisation standard de ce modèle. À partir de cette étude approfondie, nousproposons plusieurs nouveaux modèles linéaires non standard pour formuler le CDAP. Nous comparonsensuite ces modèles entre eux et ensuite avec les modèles récents de la littérature afinde déterminer le meilleur modèle linéaire. Nous proposons ensuite une Relaxation Lagrangiennepour produire de meilleures nouvelles bornes inférieures à la valeur de la solution optimale. LaRelaxation Lagrangienne est appliquée au modèle qui produit de meilleures bornes inférieuresde la relaxation continue. Le dual lagrangien est résolu par l’algorithme du sous-gradient. Lesexpérimentations montrent que les instances de grande taille ne peuvent pas être résolues parune méthode exacte en temps et ressources mémoires raisonnables. Nous proposons et implémentonsdonc deux heuristiques basées sur la recherche taboue probabiliste pour pouvoir traiterefficacement les instances de grande taille du CDAP. Pour évaluer l’efficacité de ces deux heuristiques,nous comparons leurs performances, d’abord entre elles, ensuite avec celles d’heuristiquesrécentes de la littérature. Les résultats obtenus montrent l’efficacité de nos méthodes sur des jeuxde données de la littérature
Cross-docking is a strategy originally introduced to optimize operations inside a warehouseas part of the optimization of the Supply Chain. Like traditional warehouses, productsare collected from numerous freight yards such that suppliers, factories, manufactures,etc., usingtrucks, and are moved towards processing centers named cross-docks. At cross-dock yard, productsfirst get unloaded on inbound dock doors. Afterwards, they are sorted according to theirdestinations and are immediately transferred, using handling devices, to appropriate outbounddock doors to be sometimes consolidated with other products of the same destination and arereloaded into shipping trucks. Unlike traditional warehouse where storage period of productsis indefinite, for cross-dock, goods are unloaded and reloaded the same day without waiting intemporary storage area or can wait less than one day. In this PhD thesis, we study an NP-hardoptimization problem raised by cross-dock referred to “Cross-dock Door Assignment Problem(CDAP)”. The CDAP consists in assignment of incoming and outgoing trucks to inbound andoutbound dock doors of cross-dock, respectively. The goal is to minimize the total transportationcost inside the cross-dock. The standard quadratic formulation of the CDAP includes theGeneralized Assignment Problem as subproblem. In this dissertation, we perform an extensivecross-docking literature review. Then, we carry out a broad analysis of the standard quadraticformulation as well as the standard linearization of the CDAP. From this in-deph study, wepropose several new non standard Mixed Integer Linear Programming models for the CDAP. Todetect the best linear model among those we propose and those existing, we compare the performanceof these models on instances proposed in the literature. We next propose a LagrangianRelaxation approach to produce the best new lower bounds to optimal solution value. This LagrangianRelaxation is applied to the model that produces the best LP relaxation bounds. TheLagrangian dual is solved using a subgradient algorithm. According to the experiments it seemsthat large-scale instances cannot be solved with an exact method in reasonable running times andmemory requirements. Thus, we propose and implement two heuristics based on “ProbabilisticTabu Search” to operate efficiently with larger instances of the CDAP. To assess the effectivenessof these proposed heuristics, we compare their performance, first between them and thenwith recent heuristics in the literature. The results demonstrate the efficiency of the proposedapproaches on data sets from the literature
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Hamouda, Leila. "Formulations mixtes et hybrides pour les équations de la magnétostatique 3D dans un domaine non borné : mise en oeuvre numérique de diverses techniques de résolution." Paris 11, 2002. http://www.theses.fr/2002PA112079.

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Le travail que nous présentons dans cette thèse repose sur l'étude mathématique et numérique de formulations mixtes et hybrides en magnétostatique tridimensionnelle, discrétisées par des éléments finis appropriés. Ce travail est fait dans le cadre de matériaux isotropes où l'on n'a besoin d'aucune condition au bord de la région magnétique, le problème extérieur étant résolu par une méthode intégrale. Le premier chapitre est consacré aux aspects théoriques d'une première formulation variationnelle mixte en champ magnétique et potentiel vecteur. L'existence et l'unicité de la solution de cette formulation y sont montrées. Après discrétisation, le système matriciel obtenu est alors résolu par la méthode d'Uzawa. Le second chapitre présente une méthode de pénalisation du système matriciel et de bons résultats ont été obtenus pour le Problème 13 du Team Work Shop. Nous avons également comparé cette technique de pénalisation du système matriciel avec celle du problème continu et nous avons conclu que notre technique est plus avantageuse que cette dernière. Le troisième chapitre expose la technique d'arbre en facettes, technique implémentée pour assurer l'unicité du potentiel vecteur. Le quatrième chapitre introduit les multiplicateurs de Lagrange sur les interfaces afin de relaxe les deux contraintes de continuité de la composante tangentielle du champ magnétique et de la composante normale de l'induction. Deux méthodes de résolution sont utilisées: la méthode d'Uzawa et la méthode de condensation statique. De bons résultats numériques sont obtenus. Finalement, une annexe présente un préconditionnement polynômial de la matrice de masse du système matriciel et un code est implémentée pour un domaine à perméabilité constante
We present a mathematical and a numerical study of mixed and hybrid formulations for magnetostatics 3D in an unbounded domain, discretised with well-chosen finite elements. This study deals with isotrope materials without any condition on the boundary of the magnetic domain, the external problem is solved by an integral method. The first chapter is devoted to the theoritical sights of a first mixed formulation where the magnetic field and the vector potentiel are the unknowns. The existence and the unicity of the solution are established. After the discretization, the matrix system is solved by Uzawa's method. The second chapter presents a perturbation method of the linear system. Good results are obtained for the Problem 13 of the Team Work Shop. We also compared these results with those obtained when the continued problem is perturbed. We, then, deduce that our method is more advantageous than the latter. The third chapter sets out the tree-cotree technic in order to impose the unicity of the vector potential. The fourth chapter introduces the lagrange multipliers used to relax continuity constraints: the continuity of the tangential component of magnetic field and the continuity of the normal component of the induction. Linear systems obtained have block diagonal matrix. Uzawa's method and static condensation method are used to solve these systems. Good results with good accuracy are obtained. Finally, an appendix relates the purpose of a polynomial preconditioning and a code is implemented for a domain having a constant permeability
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Legrain, Grégory. "Extension de l'approche X-FEM aux grandes transformations pour la fissuration des milieux hyperélastiques." Phd thesis, Ecole centrale de nantes - ECN, 2006. http://tel.archives-ouvertes.fr/tel-00495847.

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Le caoutchouc industriel est présent dans de nombreuses applications, de la plus basique à la plus technique. Son mode de défaillance prépondérant est la rupture due à la propagation de fissures par fatigue : les sollicitations mécaniques ainsi que l'atmosphère extérieure provoquent dans un premier temps l'apparition d'une amorce de fissure. Sous l'effet des sollicitations mécaniques, cette fissure se propage jusqu'à rupture de la pièce. L'objectif de ce travail est de faciliter la simulation numérique de la propagation de fissures dans les élastomères. Pour cela, on utilise la méthode des éléments finis étendus X-FEM. Cette méthode a été développée afin de limiter le recours au remaillage dans le cadre de la fissuration des métaux. En outre, elle permet d'enrichir l'approximation éléments finis par des fonctions provenant de la physique du problème. La première partie de ce travail consiste à adapter cette méthode à la mécanique non-linéaire de la rupture. On s'intéresse en particulier au choix de la formulation de résolution ainsi qu'à la recherche de fonctions d'enrichissement adaptées. Dans un deuxième temps, on s'intéresse à l'enrichissement des formulations mixtes pour la gestion de la contrainte d'incompressibilité. Des stratégies ont été développées afin de préserver la stabilité de ces formulations. Ces enrichissements permettent la vérification de la condition inf-sup dans le cas de trous, des inclusions et des fissures sous l'hypothèse des petites perturbations. Enfin, dans une troisième partie, on détaille l'application du concept de forces configurationnelles comme critère directionnel pour la propagation de fissures 2D et 3D.
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Guzmán, Medrano Manuel. "Novel vulcanising ingredients: towards greener rubber formulations." Doctoral thesis, Universitat Ramon Llull, 2012. http://hdl.handle.net/10803/83592.

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L'òxid de zinc és un compost àmpliament utilitzat en la indústria del cautxú a causa de les excel•lents propietats que mostra com activador per a la vulcanització amb sofre. Malgrat les seves característiques superiors, hi ha una creixent preocupació sobre els seus efectes mediambientals i nombrosos estudis s’han portat a terme per tal de reduir els nivells de ZnO als compostos de cautxú o per a substituir-lo. Entre totes les alternatives propostes per reduir la quantitat d'òxid de zinc, l'ús de nanopartícules de ZnO amb una alta superfície específica sembla prometedor. Una altra proposta per reduir els nivells de ZnO que ha estat estudiada per nombrosos autors és l'ús d'altres òxids metàl•lics, com el CaO, MgO, CdO, CuO, PbO i NiO. En aquest treball, nous activadors amb un reduït contingut de zinc han estat desenvolupats per tal de reduir l'impacte ambiental de la indústria del cautxú. Nanopartícules d'òxids metàl•lics mixtes de zinc i altres metalls s’han sintetitzat per tal de beneficiar-se de la seva grandària i aprofitar-se del comportament tant del ZnO com del MgO a la vulcanització amb sofre. Un altre gran problema mediambiental relacionat amb la indústria del cautxú és la gestió dels compostos de cautxú que han arribat al final de la seva vida útil, especialment de pneumàtics. L'impacte mediambiental dels pneumàtics, juntament amb els problemes econòmics relacionats amb la seva gestió i eliminació, ha donat lloc a una gran varietat d'estudis per desenvolupar tecnologies per a reutilitzar i reciclar els pneumàtics fora d'ús. L'ús de cautxú recuperat o regenerat en mescles amb cautxú verge s’ha investigat per diferents autors. No obstant això, la migració de les substàncies químiques entre el cautxú triturat i la matriu verge no ha estat considerada com un avantatge per tal d'utilitzar el cautxú de pneumàtics fora d'ús com un activador i, per tant, reduir els nivells de zinc emprats en els compostos de cautxú i introduir noves aplicacions per als pneumàtics fora d'ús. Aquest enfocament ha estat investigat en aquesta tesi.
El óxido de zinc es un compuesto ampliamente utilizado en la industria del caucho debido a las excelentes propiedades que muestra como activador para la vulcanización con azufre. A pesar de sus características superiores, existe una creciente preocupación acerca de sus efectos medioambientales y numerosos estudios han sido realizados con el fin de reducir los niveles de ZnO en los compuestos de caucho o para sustituirlo. Entre todas las alternativas propuestas para reducir la cantidad de óxido de zinc, el empleo de nanopartículas de ZnO con una alta superficie específica parece ser prometedor. Otro propuesta para reducir los niveles de ZnO que ha sido estudiado por numerosos autores es el uso de otros óxidos metálicos, como el CaO, MgO, CdO, CuO, PbO y NiO. En este trabajo, nuevos activadores con un reducido contenido de zinc han sido desarrollados con el fin de reducir el impacto ambiental de la industria del caucho. Nanopartículas de óxidos metálicos mixtos de zinc y otros metales han sido sintetizados con el fin de beneficiarse de su tamaño y aprovecharse del comportamiento tanto del ZnO como del MgO en la vulcanización con azufre. Otro gran problema medioambiental relacionado con la industria del caucho es la gestión de los compuestos de caucho que han alcanzado el final de su vida útil, especialmente de neumáticos. El impacto medioambiental de los neumáticos, junto con los problemas económicos relacionados con su gestión y eliminación, ha dado lugar a una gran variedad de estudios para desarrollar tecnologías para reutilizar y reciclar los neumáticos fuera de uso. El uso de caucho recuperado o regenerado en mezclas con caucho virgen ha sido investigado por diferentes autores. Sin embargo, la migración de las sustancias químicas entre el caucho triturado y la matriz virgen no ha sido considerada como una ventaja con el fin de utilizar el caucho de neumáticos fuera de uso como un activador y, por lo tanto, reducir los niveles de zinc empleadas en los compuestos de caucho e introducir nuevas aplicaciones para los neumáticos fuera de uso. Este enfoque ha sido investigado en esta tesis.
Zinc oxide is a widely used compound in rubber industry due to the excellent properties that shows as activator for sulphur vulcanisation. Despite its superior characteristics, there is an increased concern about its environmental effects and several research studies have been carried out in order to reduce the ZnO levels in rubber compounds or substitute it. Between all the alternatives proposed to reduce the ZnO levels, the use of nano-sized ZnO particles with high surface area seems to be promising. Another approach to reduce the ZnO levels that has been studied by many authors is the use of alternative metal oxides, such us CaO, MgO, CdO, CuO, PbO and NiO. In this work, novel activators with reduced zinc content have been developed in order to reduce the environmental impact of the rubber industry. Mixed metal oxides nanoparticles of zinc and other metal have been synthesised with the aim of profiting from its size and to take advantage of the behaviour of both ZnO and MgO in sulphur vulcanisation. Another environmental problem related to the rubber industry is the management of end of life and waste rubber, especially tyres. The environmental impact of waste tyres, together with the economic problems related with the management and disposal, has led to a great variety of studies to develop technologies to re-use and recycle waste tyres. The use of reclaimed or regenerated rubber in blends with virgin rubber has been investigated by different authors. However, the migration of chemicals between the crumb and the matrix has not been considered as an advantage in order to use tyre crumb as an activator and, therefore, reduce the zinc levels employed in rubber compounds and introducing new applications for the waste rubber from end of life tyres. This approach has been investigated in this thesis.
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Daoud, Rokn Aldin. "Une formulation variationnelle mixte pour la torsion des barres composites." Toulouse, INSA, 1991. http://www.theses.fr/1991ISAT0001.

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Ce travail presente une formulation variationnelle mixte du type des moindres carres permettant de traiter les problemes de la torsion uniforme des barres composites. Par une transformation geometrique, on ramene un probleme anisotrope a un probleme isotrope equivalent. La methode proposee associe, dans la section droite transformee, la methode cinematique de saint-venant en torsion et la methode statique utilisant respectivement la fonction de gauchissement et une fonction de contraintes; elle introduit une fonctionnelle intermediaire dont la minimisation est equivalente a la resolution simultanee de ces deux problemes. L'analogie avec l'elasticite plane anisotrope permet de traiter numeriquement le probleme par la voie des elements finis, moyennant un comportement equivalent. La methode donne, par un calcul unique, les grandeurs physiques et geometriques inconnues du probleme. Les resultats des cas tests ont ete compares a d'autres resultats (analytiques, numeriques, experimentaux). La concordance entre les valeurs montre d'une part la validation de la formulation proposee, d'autre part que l'on dispose d'un programme de calcul permettant de resoudre facilement le probleme
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Briggs, Samantha. "The microstructure of aqueous systems containing mixed homologue stearic acid and alkali." Thesis, University of Strathclyde, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.320084.

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Books on the topic "Formulations mixtes"

1

Noor, Ahmed Khairy. Mixed formulation for frictionless contact problems. Hampton, Va: Langley Research Center, 1989.

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Jeroslow, Robert G. Logic-based decision support: Mixed integer model formulation. Amsterdam: North-Holland, 1989.

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Truty, Andrzej. On certain classes of mixed and stabilized mixed finite element formulations for single and two-phase geomaterials. Kraków: Politechnika Krakowska, 2002.

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O, Kim Kyun, and United States. National Aeronautics and Space Administration. Scientific and Technical Information Division., eds. Mixed formulation for frictionless contact problems. [Washington, D.C.]: National Aeronautics and Space Administration, Office of Management, Scientific and Technical Information Division, 1989.

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Logic-Based Decision Support - Mixed Integer Model Formulation. Elsevier, 1989. http://dx.doi.org/10.1016/s0167-5060(08)x7019-0.

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A mixed multi-field finite element formulation for thermopiezoelectric composite shells. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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A mixed multi-field finite element formulation for thermopiezoelectric composite shells. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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A, Saravanos D., and NASA Glenn Research Center, eds. A mixed multi-field finite element formulation for thermopiezoelectric composite shells. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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A, Saravanos D., and NASA Glenn Research Center, eds. A mixed multi-field finite element formulation for thermopiezoelectric composite shells. [Cleveland, Ohio]: National Aeronautics and Space Administration, Glenn Research Center, 1999.

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R, Ohayon, and United States. National Aeronautics and Space Administration., eds. Mixed variational formulations of finite element analysis of elastoacoustic/slosh fluid structure interaction. [Washington, DC]: National Aeronautics and Space Administration, 1991.

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Book chapters on the topic "Formulations mixtes"

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Hartmann, Friedel, and Peter Jahn. "Mixed Formulations." In Springer Series in Solid and Structural Mechanics, 387–99. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-55889-5_7.

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Bunt, A. C. "Mix formulation and preparation." In Media and Mixes for Container-Grown Plants, 174–200. Dordrecht: Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-011-7904-1_8.

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Artigues, Christian, Oumar Koné, Pierre Lopez, and Marcel Mongeau. "Mixed-Integer Linear Programming Formulations." In Handbook on Project Management and Scheduling Vol.1, 17–41. Cham: Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-05443-8_2.

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Hoffman, W. Clint, Bradley K. Fritz, Jesaelen Gizotti-de-Moraes, Marcella Guerrerio, and Greg R. Kruger. "Determining Water-Sensitive Card Spread Factors for Real-World Tank Mixes." In Pesticide Formulation and Delivery Systems: 37th Volume, Formulations with Ingredients on the EPA's List of Minimal Concern, 12–21. 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959: ASTM International, 2018. http://dx.doi.org/10.1520/stp160220160019.

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Boffi, Daniele, Franco Brezzi, and Michel Fortin. "Variational Formulations and Finite Element Methods." In Mixed Finite Element Methods and Applications, 1–46. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-36519-5_1.

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Dixon, John M., and Francis A. Kulacki. "Mathematical Formulation and Numerical Methods." In Mixed Convection in Fluid Superposed Porous Layers, 15–19. Cham: Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-50787-3_2.

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Murota, Kazuo. "Physical Observations for Mixed Matrix Formulation." In Algorithms and Combinatorics, 107–30. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03994-2_3.

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Dolejší, Vít, and Miloslav Feistauer. "Methods Based on a Mixed Formulation." In Discontinuous Galerkin Method, 85–115. Cham: Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-19267-3_3.

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Cohen, Gary C. "Mass-Lumped Mixed Formulations and Edge Elements." In Scientific Computation, 261–305. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-662-04823-8_13.

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Lubin, Miles, Emre Yamangil, Russell Bent, and Juan Pablo Vielma. "Extended Formulations in Mixed-Integer Convex Programming." In Integer Programming and Combinatorial Optimization, 102–13. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-33461-5_9.

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Conference papers on the topic "Formulations mixtes"

1

Rautenberg, M., A. Engeda, and W. Wittekindt. "Mathematical Formulation of Blade Surfaces in Turbomachinery: Part I — Theoretical Surface Formulations." In ASME 1989 International Gas Turbine and Aeroengine Congress and Exposition. American Society of Mechanical Engineers, 1989. http://dx.doi.org/10.1115/89-gt-160.

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This paper justifies recent trends in the mathematical definition of blade surfaces of impellers and rotors. The authors introduce a simple and efficient surface definition method, which is highly suited for numerical manufacture. Examples of a centrifugal compressor impeller, a mixed flow pump impeller and a gas turbine blade manufactured using the method are also presented. In this first part the theoretical approach and the mathematical derivations of the authors STRAIGHT-LINE-SURFACE structure method is introduced.
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Zhang, Yifei, Kanth Kurumaddali, Jeffrey C. Suhling, Pradeep Lall, and Michael J. Bozack. "Material Behavior of Mixed Formulation Solder Joints." In ASME 2009 InterPACK Conference collocated with the ASME 2009 Summer Heat Transfer Conference and the ASME 2009 3rd International Conference on Energy Sustainability. ASMEDC, 2009. http://dx.doi.org/10.1115/interpack2009-89003.

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The transition from tin-lead to lead free soldering in the electronics manufacturing industry has been in progress for the past 10 years. In the interim period before lead free assemblies are uniformly accepted, mixed formulation solder joints are becoming commonplace in electronic assemblies. For example, area array components (BGA/CSP) are frequently available only with lead free Sn-Ag-Cu (SAC) solder balls. Such parts are often assembled to printed circuit boards using traditional 63Sn-37Pb solder paste. The resulting solder joints contain unusual quaternary alloys of Sn, Ag, Cu, and Pb. In addition, the alloy composition can vary across the solder joint based on the paste to ball solder volumes and the reflow profile utilized. The mechanical and physical properties of such Sn-Ag-Cu-Pb alloys have not been explored extensively in the literature. In addition, the reliability of mixed formulation solder joints is poorly understood. In this work, we have explored the physical properties and mechanical behavior of mixed formulation solder materials. Seven different mixture ratios of 63Sn-37Pb and SAC305 solder materials have been formed, which include five carefully controlled mixtures of the two solder alloys (by weight percentage) and the two extreme cases (pure Sn-Pb and pure SAC). For the various percentage mixtures, the melting point, pasty range, stress-strain curves, mechanical properties (modulus, strength), and creep curves have been characterized. The variations of the mechanical properties and creep rates with aging at room temperature (25 °C) and elevated temperature (100 °C) have also been measured. Finally, the microstructures realized with the various mixtures have been found and correlated to the mechanical measurements and microstructures found in actual mixed formulation BGA solder joints. The results for the mechanical and physical properties show a very complicated dependence on the mixture ratio.
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Dietzsch, J., and M. Groß. "Mixed Finite Element Formulations for Polyconvex Anisotropic Material Formulations." In 14th WCCM-ECCOMAS Congress. CIMNE, 2021. http://dx.doi.org/10.23967/wccm-eccomas.2020.201.

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Quan, Ning, and Harrison Kim. "A Mixed Integer Linear Programming Formulation for Unrestricted Wind Farm Layout Optimization." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46876.

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This paper proposes a mixed integer linear programming formulation of the unrestricted wind farm layout optimization problem. The formulation is achieved in part by changing the objective from power generation maximization to the maximization of the smallest penalized downstream distance between any pair of turbines, where downstream distance is defined as the distance between any pair of turbines with overlapping wake cones. The proposed formulation also linearizes other non-linear characteristics of the unrestricted layout optimization problem such as proximity constraints and wake-cone membership. The main advantage of the proposed approach is that an optimal solution to the proposed formulation is guaranteed to be globally optimal. This is in contrast to previous approaches with non-linear formulations that do not come with such guarantees.
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Garci´a-Vallejo, Daniel, Jose´ L. Escalona, Juana M. Mayo, and Jaime Domi´nguez. "Formulation of Three-Dimensional Rigid-Flexible Multibody Systems." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-35013.

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Multibody systems generally contain solids the deformations of which are appreciable and which decisively influence the dynamics of the system. These solids have to be modeled by means of special formulations for flexible solids. At the same time, other solids are of such a high stiffness that they may be considered rigid, which simplifies their modeling. For these reasons, for a rigid-flexible multibody system, two types of formulations co-exist in the equations of the system. Among the different possibilities provided in bibliography on the material, the formulation in natural coordinates and the formulation in absolute nodal coordinates are utilized in this article to model the rigid and flexible solids, respectively. This article contains a mixed formulation based on the possibility of sharing coordinates between a rigid solid and a flexible solid. In addition, the fact that the matrix of the global mass of the system is shown to be constant and that many of the constraint equations obtained upon utilizing these formulations are linear and can be eliminated. In this work, the formulation presented is utilized to simulate a mechanism with both rigid and flexible components.
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Kunkel, Gary J., and Ivan Marusic. "Similarity Formulations for Turbulent Boundary Layers at High Reynolds Numbers." In ASME/JSME 2003 4th Joint Fluids Summer Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/fedsm2003-45455.

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Data obtained from the high Reynolds number atmospheric boundary layer are used to analyze existing mean-flow and turbulence intensity similarity formulations. From the results of this analysis a new streamwise turbulence intensity formulation is proposed that is suggested to be applicable across the entire smooth-wall high Reynolds number turbulent boundary layer. The new formulation is also shown to be consistent with the mixed-flow scaling suggested by other studies.
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Sugiyama, Hiroyuki, Jose´ L. Escalona, and Ahmed A. Shabana. "Spatial Joint Constraints in Flexible Multibody Systems Using the Absolute Nodal Coordinate Formulation." In ASME 2003 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2003. http://dx.doi.org/10.1115/detc2003/vib-48354.

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This paper is concerned with the formulation and computer implementation of spatial joint constraints and generalized forces using the large deformation absolute nodal coordinate formulation. Unlike the floating frame of reference formulation that employs a mixed set of absolute reference and local elastic coordinates, in the absolute nodal coordinate formulation, global displacement and slope coordinates are used. The nonlinear kinematic constraint equations and generalized force expressions are expressed in terms of the absolute global displacements and slopes. In particular, a new formulation for the sliding joint between two very flexible bodies is developed. A contact parameter is introduced as an additional new variable in order to facilitate the formulation of this sliding joint. Numerical examples are presented in order to demonstrate the use of the formulations developed in the paper.
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Gress, Aubrey, and Ian Davidson. "Probabilistic Formulations of Regression with Mixed Guidance." In 2016 IEEE 16th International Conference on Data Mining (ICDM). IEEE, 2016. http://dx.doi.org/10.1109/icdm.2016.0109.

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Moncorgé, Arthur, Martin Petitfrère, and Sylvain Thibeau. "Complete EOS Thermal Formulation for Simulation of CO2 Storage." In SPE Offshore Europe Conference & Exhibition. SPE, 2021. http://dx.doi.org/10.2118/205447-ms.

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Abstract Storage of CO2 in depleted gas reservoirs or large aquifers is one of the available solutions to reduce anthropogenic greenhouse gas emissions. Numerical modeling of these processes requires the use of large geological models with several orders of magnitude of variations in the porous media properties. Moreover, modeling the injection of highly concentrated and cold CO2 in large reservoirs with the correct physics is introducing numerical challenges that conventional reservoir simulators cannot handle. We propose a thermal formulation based on a full equation of state formalism to model pure CO2 and CO2 mixtures with the residual gas of depleted reservoirs. Most of the reservoir simulators model the phase-equilibriums with a pressure-temperature based formulation. With this usual framework, it is not possible to exhibit two phases with pure CO2 contents. Moreover, in this classical framework, the crossing of the phase envelope is associated with a large discontinuity in the enthalpy computation which can prevent the convergence of the energy conservation equation. In this work, accurate and continuous phase properties are obtained basing our formulation on enthalpy as a primary variable. We first implement a new phase-split algorithm with input variables as pressure and enthalpy instead of the usual pressure and temperature and we validate it on several test cases. This algorithm can model situations where the mixture can change rapidly from one phase to the other at constant pressure and temperature. Then treating enthalpy instead of temperature as a primary variable in both the reservoir and the well modeling algorithms, our reservoir simulator can model situations with pure or near pure components as well as crossing of the phase envelope that usual formulations implemented in reservoir simulators cannot handle. We first validate our new formulation against the usual formulation on a problem where both formulations can correctly represent the physics. Then we show situations where the usual formulations fail to represent the correct physics and that are simulated well with our new formulation. Finally, we apply our new model for the simulation of pure and cold CO2 injection in a real depleted gas reservoir from the Netherlands.
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Batistela, Gustavo Alcalá, Denise De Siqueira, and Phillipe R. B. Devloo. "A posteriori error estimates for enriched mixed formulations." In CNMAC 2019 - XXXIX Congresso Nacional de Matemática Aplicada e Computacional. SBMAC, 2020. http://dx.doi.org/10.5540/03.2020.007.01.0340.

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Reports on the topic "Formulations mixtes"

1

Buck, Edgar C., and Richard S. Wittman. Radiolysis Model Formulation for Integration with the Mixed Potential Model. Office of Scientific and Technical Information (OSTI), July 2014. http://dx.doi.org/10.2172/1168932.

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Scholnik, Dan P., and Jeffrey O. Coleman. Second-Order Cone Formulations of Mixed-Norm Error Constraints for FIR Filter Optimization. Fort Belvoir, VA: Defense Technical Information Center, June 2010. http://dx.doi.org/10.21236/ada523252.

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Stockdale, J. A. D., W. D. Bostick, D. P. Hoffmann, and H. T. Lee. Surrogate formulations for thermal treatment of low-level mixed waste. Part 1: Radiological surrogates. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10150109.

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Bostick, W. D., D. P. Hoffmann, J. M. Chiang, W. H. Hermes, L. V. Jr Gibson, A. A. Richmond, J. Mayberry, and G. Frazier. Surrogate formulations for thermal treatment of low-level mixed waste, Part II: Selected mixed waste treatment project waste streams. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10160913.

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Glowinski, R., W. Kinton, and M. F. Wheeler. A Mixed Finite Element Formulation for the Boundary Controllability of the Wave Equation. Fort Belvoir, VA: Defense Technical Information Center, October 1990. http://dx.doi.org/10.21236/ada226066.

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Buck, Edgar C., and Richard S. Wittman. Addition of Bromide to Radiolysis Model Formulation for Integration with the Mixed Potential Model. Office of Scientific and Technical Information (OSTI), July 2016. http://dx.doi.org/10.2172/1592703.

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Bostick, W. D., D. P. Hoffmann, R. J. Stevenson, A. A. Richmond, and D. F. Bickford. MWIP: Surrogate formulations for thermal treatment of low-level mixed waste. Part 4, Wastewater treatment sludges. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10162826.

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Chiang, J. M., W. D. Bostick, D. P. Hoffman, W. H. Hermes, L. V. Jr Gibson, and A. A. Richmond. Surrogate formulations for thermal treatment of low-level mixed waste. Part 3: Plasma hearth process testing. Office of Scientific and Technical Information (OSTI), January 1994. http://dx.doi.org/10.2172/10161255.

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Henry, Stephen, Frank Muldoon, Matthew Hoffman, Gio Kao, Craig Lawton, Darryl Melander, and Liliana Shelton. The Capability Portfolio Analysis Tool (CPAT): A Mixed Integer Linear Programming Formulation for Fleet Modernization Analysis. Office of Scientific and Technical Information (OSTI), May 2015. http://dx.doi.org/10.2172/1815350.

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Waddell, Lucas, Frank Muldoon, Stephen Michael Henry, Matthew John Hoffman, April Marie Zwerneman, Peter Backlund, Darryl J. Melander, Craig R. Lawton, and Roy Eugene Rice. The Capability Portfolio Analysis Tool (CPAT): A Mixed Integer Linear Programming Formulation for Fleet Modernization Analysis (Version 2.0.2). Office of Scientific and Technical Information (OSTI), September 2017. http://dx.doi.org/10.2172/1397137.

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