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Auteur M. Malik
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Institute of Technology - Castle Point St. Hoboken - New Jersey - USA
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3D finite element simulation of processing of generalized newtonian fluids in counter-rotating and tangential TSE and die combination / M. Malik in INTERNATIONAL POLYMER PROCESSING, Vol. XX, N° 4 (12/2005)
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Titre : 3D finite element simulation of processing of generalized newtonian fluids in counter-rotating and tangential TSE and die combination Type de document : texte imprimé Auteurs : M. Malik, Auteur ; Dylan M. Kalyon, Auteur Année de publication : 2005 Article en page(s) : p. 398-409 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : A full three-dimensional finite element analysis of the nonisothermal flow of generalized non-Newtonian fluids in counter-rotating tangential twin screw extruder is presented. Previous studies of the simulation of processing in tangential twin screw extruders have focused solely on the twin screw extruder, whereas here the coupled flow and heat transfer occurring in the integrated geometry of the extruder, connected to a die are considered. The FEM based numerical simulation of the coupled momentum-mass-energy conservation equations allowed the determination of the effects of some of the important system parameters, including the power law index and the staggering angle of the screws, on the pumping and pressurization capability of the extruder and the associated degree of fill in the extruder. DOI : 10.3139/217.2013 En ligne : https://drive.google.com/file/d/1Ngk0vG2C3EpStUBkaaVXy5L2uq9f8QbU/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2965
in INTERNATIONAL POLYMER PROCESSING > Vol. XX, N° 4 (12/2005) . - p. 398-409[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003422 - Périodique Bibliothèque principale Documentaires Disponible An integrated approach for numerical analysis of coupled flow and heat transfer in co-rotating twin screw extruders / Dylan M. Kalyon in INTERNATIONAL POLYMER PROCESSING, Vol. XXII, N° 3 (07/2007)
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Titre : An integrated approach for numerical analysis of coupled flow and heat transfer in co-rotating twin screw extruders Type de document : texte imprimé Auteurs : Dylan M. Kalyon, Auteur ; M. Malik, Auteur Année de publication : 2007 Article en page(s) : p. 293-302 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : The co-rotating twin screw extrusion process is widely employed in chemical industries for the processing of complex fluids including various polymers, suspensions, emulsions and gels. Here we propose a new integrated modeling strategy that is based on the numerical analysis of pressure-generating extrusion elements concomitantly with the pressure-losing extrusion elements of the co-rotating twin screw extrusion process for non-Newtonian fluids under nonisothermal conditions. The numerical analysis undertakes three-dimensional (3-D) finite element simulations of any multiple combinations of forwarding and reversing fully-flighted screw elements with other types of elements including kneading discs staggered in the forward or reverse configurations and the die. The abilities of the methodologies in simulating the coupled flow and heat transfer in industrially-relevant mixing sections or pressurization/die shaping are demonstrated with predictions of the degree of fill and typical velocity, deformation rate, stress magnitude, pressure distributions as functions of various operating parameters and basic twin screw extrusion geometries for a viscoplastic type generalized Newtonian fluid. DOI : 10.3139/217.1020 En ligne : https://drive.google.com/file/d/1QEcPYIhJKK98s3VkfNMmdRX0mP-N6ZTf/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2707
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Code-barres Cote Support Localisation Section Disponibilité 008072 - Périodique Bibliothèque principale Documentaires Disponible Simulation of co-rotating twin screw extrusion process subject to pressure-dependent wall slip at barrel and screw surfaces : 3D FEM analysis for combinations of forward- and reverse-conveying screw elements / M. Malik in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 1 (03/2014)
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Titre : Simulation of co-rotating twin screw extrusion process subject to pressure-dependent wall slip at barrel and screw surfaces : 3D FEM analysis for combinations of forward- and reverse-conveying screw elements Type de document : texte imprimé Auteurs : M. Malik, Auteur ; Dylan M. Kalyon, Auteur ; J. C. Golba, Auteur Année de publication : 2014 Article en page(s) : p. 51-62 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Ecoulement visqueux
Eléments finis, Méthode des
Extrudeuse bi-vis
Matières plastiques -- Extrusion
Modèles mathématiques
Simulation par ordinateurIndex. décimale : 668.4 Plastiques, vinyles Résumé : Mathematical modeling and simulation of the coupled flow, deformation, heat and mass transfer, and rate of reactions occurring in the twin screw extruder allow the optimization of process parameters and the screw and barrel geometries. In mathematical modeling of the twin screw extrusion process the conventional flow boundary condition at the screw and barrel walls is the no-slip condition. However, most complex fluids, including polymers, polymeric suspensions and blends, exhibit wall slip, with the slip behavior depending on the intrinsic properties of the materials being processed, the operating conditions, the geometries of the barrel, screw and the die, and the properties of the solid surfaces. Typically, the slip velocity is specified to be a function of temperature, stress condition at the wall and the materials of construction. However, recent investigations have further revealed that the wall slip behavior can also be significantly affected by pressure. With an objective of considering the effects of wall slip on the dynamics of twin screw extrusion, fully-intermeshing co-rotating twin screw extrusion of a concentrated suspension is analyzed using three-dimensional finite element method, FEM, subject to the wall slip boundary condition. The wall slip boundary condition is first applied systematically to barrel and screw surfaces individually followed by the application of wall slip to both surfaces simultaneously. In an integrated fashion both the forward-conveying (pressure-generating) and reverse-conveying (pressure-losing) screw sections are considered. The effects of pressure on wall slip are also analyzed and elucidated. Note de contenu : - MATHEMATICAL MODEL OF THE FULLY-INTERMESHING CO-ROTATING TWIN SCREW EXTRUSION PROCESS : Geometry - Regularization of the viscoplastic constitutive equation - FEM analysis - Wall slip boundary condition DOI : 10.3139/217.2802 En ligne : https://drive.google.com/file/d/1Xvzy_QPFV7SHpPjW82F07IHhyR3ykRmG/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=20575
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 1 (03/2014) . - p. 51-62[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 16006 - Périodique Bibliothèque principale Documentaires Disponible