![](./images/home.jpg)
![](./images/bar_spacer.gif)
Catégories
![]() RhéologieVoir aussi
|
![](./images/expand_all.gif)
![](./images/collapse_all.gif)
Etendre la recherche sur niveau(x) vers le bas
Numerical investigation and experimental observation of extrudate swell for viscoelastic polymer melts / M. Kanvisi in INTERNATIONAL POLYMER PROCESSING, Vol. XXIX, N° 2 (05/2014)
![]()
[article]
Titre : Numerical investigation and experimental observation of extrudate swell for viscoelastic polymer melts Type de document : texte imprimé Auteurs : M. Kanvisi, Auteur ; S. Motahari, Auteur ; B. Kaffashi, Auteur Année de publication : 2014 Article en page(s) : p. 227-232 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Analyse numérique
Etat fondu (matériaux)
Extrusion -- Défauts
Gonflement (physique)
Matières plastiques -- Extrusion:Polymères -- Extrusion
Polyéthylène basse densité
Polyéthylène basse densité linéaire
Polyéthylène haute densité
Polystyrène choc
Rhéologie
ViscoélasticitéIndex. décimale : 668.9 Polymères Résumé : In the present research die swell phenomenon is investigated for the viscoelastic polymer melts both experimentally and by developing a mathematical model in a circular die for high impact polystyrenes (HIPS), high density polyethylene (HDPE), low density polyethylene (LDPE) and linear low density polyethylene (LLDPE). Die swell is generally attributed to the fluid stress field when the fluid flows in a die. The Leonov-like equations as a conformational model are solved simultaneously with dynamic equation of momentum transfer to predict the stress field for a viscoelastic fluid in a circular die. The average molecular weight, the polymer relaxation time and the polymer mobility tensors are determined using the experimental measurements of shear viscosity. Then, based on those data, a model is developed. The results predicted by the model for flow stress field are then used to calculate die swell ratio by Tanner’s analytical model. Die swell ratio is also found out experimentally using a capillary rheometer for the samples. Comparison of the die swell results predicted by the model and measured experimentally show very good agreement for the polymers. Note de contenu : - EXPERIMENTAL PROCEDURE : Material - Rheological and extrudate swell measurements
- CONSTITUTIVE EQUATIONS
- GOVERNING EQUATIONSDOI : 10.3139/217.2840 En ligne : https://drive.google.com/file/d/15usDpqJuOCT6QlvxQ4ZugPq-SeO1Dr7O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=21317
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIX, N° 2 (05/2014) . - p. 227-232[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 16222 - Périodique Bibliothèque principale Documentaires Disponible Numerical investigation of effect of rotor phase angle in partially-filled rubber mixing / S. R. Das in INTERNATIONAL POLYMER PROCESSING, Vol. XXXII, N° 3 (07/2017)
![]()
[article]
Titre : Numerical investigation of effect of rotor phase angle in partially-filled rubber mixing Type de document : texte imprimé Auteurs : S. R. Das, Auteur ; H. Poudyal, Auteur ; Abhilash J. Chandry, Auteur Année de publication : 2017 Article en page(s) : p. 343-354 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Alliages polymères
Analyse des flux de matières et d'énergie
Analyse numérique
Caoutchouc
Mélange
Rhéologie
RotorsIndex. décimale : 668.4 Plastiques, vinyles Résumé : Among several operational parameters such as rotor speed, fill factor and ram pressure, the orientation of the mixing rotors with respect to each other plays a significant role in the mixing performance. An understanding of the flow field and mixing characteristics associated with the orientations of the rotors will help in obtaining a final product with a better quality. For that purpose three phase angle orientations: 45°, 90° and 180° are investigated here in a 75% filled chamber with two rotors counter-rotating at an even speed of 20 min–1. Two dimensional, transient, isothermal, incompressible simulations are carried out using a CFD code. While an Eulerian multiphase method was used to solve for the transport variables in the two phases: rubber and air, the volume of fluid (VOF) method was used to solve for the interface between the two phases. A non-Newtonian Carreau-Yasuda model was used to characterize rubber. Massless particles were injected in the domain to calculate statistical quantities in order to assess dispersive and distributive mixing characteristics associated with rotor orientations. The flow field is analyzed via pressure and velocity contours. Dispersive mixing was analyzed through histograms of mixing index and cumulative probability distribution functions of maximum shear stress experienced by the particles. Distributive mixing was quantified statistically using cluster distribution index and interchamber material transfer. The phase angle of 180° was found to perform the best in terms of both dispersive and distributive mixing characteristics. Note de contenu : - PHYSICAL PROBLEM DESCRIPTION : GEOMETRY AND MATERIALS
- NUMERICAL METHODS
- GOVERNING EQUATIONS
- RESULTS AND DISCUSSION : Flow analysis - Dispersive mixing - Distributive mixingDOI : 10.3139/217.3346 En ligne : https://drive.google.com/file/d/1oWpSHFLXQYniMkskC6pJWZUVqJcaJloW/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=28836
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXII, N° 3 (07/2017) . - p. 343-354[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 19064 - Périodique Bibliothèque principale Documentaires Disponible Numerical investigation of pressure drop within isothermal capillary rheometry for viscous and viscoelastic fluids / Huan-Chang Tseng in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 4 (2023)
![]()
[article]
Titre : Numerical investigation of pressure drop within isothermal capillary rheometry for viscous and viscoelastic fluids Type de document : texte imprimé Auteurs : Huan-Chang Tseng, Auteur Année de publication : 2023 Article en page(s) : p. 447-455 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Etat fondu (matériaux)
Polyéthylène basse densité
Rhéologie
Rhéométrie
Simulation par ordinateur
ViscoélasticitéIndex. décimale : 668.4 Plastiques, vinyles Résumé : In capillary rheometry of a polymer melt, the total pressure drop consists of three primary components: shear viscosity, extensional viscosity, and normal stress differences. Traditionally, viscoelastic constitutive equations have been used to produce accurate predictions regarding the pressure drop. It is difficult to investigate the primary components in past experimental measurements and numerical computations. The useful improvement of the classic White-Metzner viscoelastic constitutive equation coupled with the weighted shear/extension viscosity is performed in isothermal capillary flow simulations. It is significant to analyze the extension-induced pressure drop for a short die and the shear-induced pressure drop for a long die, along with a small contribution of normal stress differences. Note de contenu : - GNF shear viscosity
- GNF-X weighted shear/extensional viscosity
- WMT-X viscoelastic constitutive equation
- Table 1 : Model parameters of material functions for a LDPE melt at 150 °C
- Table 2 : For a LDPE melt in capillary rheometry with a short die with aspect ratio of L/D = 0.2, the total pressure drop consists of three components, ΔP S , ΔP E , and ΔP N .
- Table 3 : For a LDPE melt in capillary rheometry with a long die with aspect ratio of L/D = 20, the total pressure drop consists of three components, ΔP S , ΔP E , and ΔP NDOI : https://doi.org/10.1515/ipp-2022-4322 En ligne : https://drive.google.com/file/d/1VHLhRybQ3B6B_lOcerg2aJ3IXuMZTnw2/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=40107
in INTERNATIONAL POLYMER PROCESSING > Vol. 38, N° 4 (2023) . - p. 447-455[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 24319 - Périodique Bibliothèque principale Documentaires Disponible Numerical simulation of chaotic mixing in single screw extruders with different baffle heights in INTERNATIONAL POLYMER PROCESSING, Vol. XXXI, N° 1 (03/2016)
![]()
[article]
Titre : Numerical simulation of chaotic mixing in single screw extruders with different baffle heights Type de document : texte imprimé Année de publication : 2016 Article en page(s) : p. 108-118 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Extrudeuse monovis
Fluides non newtoniens
Imagerie tridimensionnelle
Matières plastiques -- Extrusion:Polymères -- Extrusion
Mélanges (chimie)
Rhéologie
Simulation par ordinateurIndex. décimale : 668.9 Polymères Résumé : A kind of discontinuous baffle, which had the same length as the non-baffle zone distance, was inserted in the unwound channel of a single screw extruder to enhance mixing in the screw channel. The periodic unit of the flow channel was modeled as a dynamic system of complex duct flow. The finite volume method was used to solve the three-dimensional flow of purely viscous non-Newtonian fluid. Fluid particle tracking was performed by a fourth-order Runge–Kutta scheme. The effect of the baffle height on the mixing kinematics was investigated numerically. Poincaré sections were applied to reveal the different patterns and sizes of the KAM tubes. Distributive mixing was then visualized by the evolution of passive tracers initially located at different positions. The variance index and residence time distribution (RTD) were used to evaluate the statistical results. Among the four test cases, the results showed that the case with the baffle height equal to the screw depth had the largest chaotic mixing region, but the shortest mean residence time and the narrowest broadening of RTD under the same pressure gradient. Note de contenu : - NUMERICAL METHOD : General and geometric parameters - Modeling - Numerical simulation - Velocity fields - Particle tracking method and front tracing
- RESULTS AND DISCUSSION : Period Poincaré sections - Variance as a mixing measure - Residence time distributionDOI : 10.3139/217.3167 En ligne : https://drive.google.com/file/d/1zF3qVtiS9MogovUw3Xd3h9F17nWJCv7w/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=25776
in INTERNATIONAL POLYMER PROCESSING > Vol. XXXI, N° 1 (03/2016) . - p. 108-118[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 17899 - Périodique Bibliothèque principale Documentaires Disponible Numerical simulation of film casting : viscoelastic effects / Benoît Debbaut in LES CAHIERS DE RHEOLOGIE, Vol. XIV, N° 1 (09/1995)
[article]
Titre : Numerical simulation of film casting : viscoelastic effects Type de document : texte imprimé Auteurs : Benoît Debbaut, Auteur ; Jean-Marie Marchal, Auteur Année de publication : 1995 Article en page(s) : p. 365-373 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Eléments finis, Méthode des
Films coulés
Fluides newtoniens
Rhéologie
Simulation par ordinateur
ViscoélasticitéIndex. décimale : 532.05 Mécanique des fluides et des liquides - Dynamique (cinétique et cinématique) Résumé : L'influence des effets viscoélastiques dans le procédé d'étirage de films est analysée par la méthode des éléments finis. L'article présente un modèle de tensions planes appliqué au film étiré considéré comme une membrane fluide. Les simulations numériques du procédé d'étirage sont réalisées pour des modèles de fluides newtonien et viscoélastiques différentiels. Les phénomènes de surépaisseur et de striction sont mis en évidence dans les résultats de simulation, et analysés à la lumière des propriétés viscoélastiques et du comportement du fluide en extension. Note de contenu : - MODELLING : Flow equations - Numerical algorithm
- FILM CASTING OF A NEWTONIAN FLUID
- FILM CASTING OF A VISCOELASTIC FLUIDPermalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=26272
in LES CAHIERS DE RHEOLOGIE > Vol. XIV, N° 1 (09/1995) . - p. 365-373[article]Réservation
Réserver ce document
Exemplaires (1)
Code-barres Cote Support Localisation Section Disponibilité 002115 - Périodique Bibliothèque principale Documentaires Disponible Numerical simulation of flows in beadless disperser by finite difference lattice Boltzmann method / X. F. Zhang in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 4, N° 1 (03/2007)
![]()
PermalinkNumerical simulation of fluid flow and mixing dynamics inside planetary roller extruders / J. Winck in INTERNATIONAL POLYMER PROCESSING, Vol. 36, N° 5 (2021)
![]()
PermalinkNumerical visualization of extensional flows in injection molding of polymer melts / Huan-Chang Tseng in INTERNATIONAL POLYMER PROCESSING, Vol. 38, N° 2 (2023)
![]()
PermalinkOn-line, non-Newtonian capillary rheometry for continuous and in-line coatings production / Shicong Luo in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 3 (05/2021)
![]()
PermalinkOn the pressure dependency of the Bagley correction / Peter Van Puyvelde in INTERNATIONAL POLYMER PROCESSING, Vol. XXVIII, N° 5 (11/2013)
![]()
PermalinkOn the pulse of the polymer melt / Christin Thalhofer in KUNSTSTOFFE INTERNATIONAL, Vol. 106, N° 10 (10/2016)
![]()
PermalinkOn the use of an internal mixer to study the impregnation of carbon fillers by organic liquids / Meral Akkoyun in APPLIED RHEOLOGY, Vol. 24, N° 1 (2014)
PermalinkOnline control of polymer manufacturing / Oliver Hissmann in KUNSTSTOFFE INTERNATIONAL, Vol. 103, N° 10 (10/2013)
PermalinkOperability limits for non-Newtonian liquids in dual-layer slot coating processes using the viscocapillary model / Jin Seok Park in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 1 (01/2022)
![]()
PermalinkOperational manual for flow cup viscometer / Mukund Hulyalkar in PAINTINDIA, Vol. LXIV, N° 9 (09/2014)
![]()
PermalinkOptimisation of corrosion protection properties of epoxy clear coats / Hubert Oggermüller in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 206, N° 4627 (12/2016)
![]()
PermalinkOptimisation of process parameters of Alpaca wool printing with Juglans regia natural dye / Martinia Glogar in COLORATION TECHNOLOGY, Vol. 136, N° 2 (04/2020)
PermalinkOptimised processes without a major investment in testing / Manfred Peschka in ADHESION - ADHESIVES + SEALANTS, N° 4/2008 (04/2008)
![]()
PermalinkOptimiser la dispersion du noir de carbone / Matthew C. Putman in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 879 (10/2010)
PermalinkOptimising sunscreen delivery via UV filter use / Julian P. Hewitt in PERSONAL CARE EUROPE, Vol. 4, N° 4 (11/2011)
![]()
PermalinkOptimization and development of stable w/o/w cosmetic multiple emulsions by means of the quality by design approach / Anita Kovács in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 38, N° 2 (04/2016)
![]()
PermalinkOptimization of the UVP + PD rheometric method for flow behavior monitoring of industrial fluid suspensions / Reinhardt Kotze in APPLIED RHEOLOGY, Vol. 22, N° 4 (2012)
PermalinkOptimizing interactions between soluble silk fibroin and capryl glucoside for design of a natural and high-performance co-surfactant system in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 43, N° 1 (02/2021)
![]()
PermalinkOrganoclays : Rheological additives for solvent-borne coatings / Valentina Ermini in PAINTINDIA, N° annuel 2002 (2002)
PermalinkOrigine physique du rhéoépaissement des suspensions denses : une transition frictionnelle / C. Clavaud in RHEOLOGIE, Vol. 36 (12/2019)
PermalinkLes outils de simulation progressent en plasturgie / Ronan Le Goff in PLASTIQUES & CAOUTCHOUCS MAGAZINE, N° 864 (02/2009)
PermalinkPackaging Productivity / Martha Belem Mendieta in ADHESIVES & SEALANTS INDUSTRY (ASI), Vol. 17, N° 3 (03/2010)
![]()
PermalinkPaint flow and pigment dispersion / Temple C. Patton / New York [Etats-Unis] : John Wiley & Sons (1979)
PermalinkParallel measurements and engineering simulations of conversion, shear modulus, and internal stress during ambient curing of a two-component epoxy coating / Qiong Li in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 19, N° 5 (09/2022)
![]()
PermalinkParameters influencing the spray behavior of waterborne coatings / Lin-lin Xing in JOURNAL OF COATINGS TECHNOLOGY (JCT), Vol. 71, N° 890 (03/1999)
PermalinkPartially filled flow simulation using meshfree method for high viscosity fluid in plastic mixer / Kazuhide Sekiyama in INTERNATIONAL POLYMER PROCESSING, Vol. XXXIV, N° 2 (05/2019)
![]()
PermalinkPassage, pour une solution de CTAB, du rhéoépaississement à une structure en bandes de cisaillement par addition de NaSal ou variation de la température / V. Hartmann in LES CAHIERS DE RHEOLOGIE, Vol. XV, N° 1 (10/1996)
PermalinkPermalinkPeak performance, solvent-based dispersing agents for Cu-phthalocyanine pigments / Manfred Jorna in POLYMERS PAINT COLOUR JOURNAL - PPCJ, Vol. 203, N° 4591 (12/2013)
![]()
PermalinkPeculiar capillary rheometry results associated with compressibility like effects / Jean L. Leblanc in LES CAHIERS DE RHEOLOGIE, Vol. XVII, N° 1 (10/2000)
PermalinkPeintures et vernis. Détermination du temps d'écoulement au moyen de coupe d'écoulement - Norme ISO 2431 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2011)
PermalinkPeintures et vernis. Détermination de la viscosité au moyen de viscosimètres rotatifs - Partie 1 : Viscosimètre à cône et plateau fonctionnant à gradient de vitesse de cisaillement élevé - Norme ISO 2884-1 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (1999)
PermalinkPeintures et vernis. Détermination de la viscosité au moyen de viscosimètres rotatifs - Partie 2 : Viscosimètre à disque ou à bille, fonctionnant à vitesse spécifiée- Norme ISO 2884-2 / International Organization for Standardization (Genève, Suisse) / Geneve [Switzerland] : International Organization for Standardization (ISO) (2003)
PermalinkPerformance control of polyether-based reactive hot melt adhesives / Ricardo De Genova in ADHESIVES AGE, Vol. 40, N° 12 (11/1997)
![]()
PermalinkA personal perspective on the use of modelling simulation for polymer melt processing / Jean-François Agassant in INTERNATIONAL POLYMER PROCESSING, Vol. XXX, N° 1 (03/2015)
![]()
PermalinkPhysical and material properties of an emulsion-based lipstick produced via a continuous process / Akash Beri in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 36, N° 2 (04/2014)
![]()
PermalinkPhysical gelation of gelatin solutions : effect of gelatin concentration, pH, ionic strength and solvents / Guangfeng Feng in JOURNAL OF THE SOCIETY OF LEATHER TECHNOLOGISTS & CHEMISTS (JSLTC), Vol. 103, N° 3 (05-06/2019)
![]()
PermalinkPhysical–Mechanical characterization of cosmetic formulations and correlation between instrumental measurements and sensorial properties / L. S. Calixto in INTERNATIONAL JOURNAL OF COSMETIC SCIENCE, Vol. 39, N° 5 (10/2017)
PermalinkPlastiques. Détermination des caractéristiques rhéologique à l'état fondu. Méthode au rhéomètre capillaire - Norme NF T 51-560 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1990)
PermalinkPlastiques renforcés de fibres. Compositions de moulage thermodurcissables et préimprégnés. Détermination de la fluidité, de la maturation et de la durée de vie - Normes NF EN ISO 12115 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1997)
PermalinkPlastiques renforcés de fibres. Préimprégnés. Détermination du taux d'écoulement conventionnel de résine (flot) parallèlement au plan des plis - Norme T 50-603 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1988)
PermalinkPlastiques. Résines phénoliques solides. Détermination du point de ramollissement. Méthode Bille et anneau - Norme NF T 51-437 / Association Française de Normalisation (Paris) / Saint-Denis La Plaine : Association Française de Normalisation (AFNOR) (1985)
PermalinkPolycarboxylates – Essential and Multifunctional / R. Ettl in TENSIDE, SURFACTANTS, DETERGENTS, Vol. 46, N° 2/2009 (02-03/2009)
PermalinkPolyimide–polyester hybrid UV-curable powder coating / Hamideh M. Shokouhi Mehr in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH, Vol. 18, N° 6 (11/2021)
![]()
PermalinkPolymer diffusion in inhomogeneous flow fields : pseudospectral calculations in the Taylor-Couette geometry / Michalis Apostolakis in LES CAHIERS DE RHEOLOGIE, Vol. XVII, N° 1 (10/2000)
Permalink