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Analytical model for the throughput and drive power calculation in the melting section of single screw plasticizing units considering wall-slippage / H. Potente in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 1 (03/2009)
[article]
Titre : Analytical model for the throughput and drive power calculation in the melting section of single screw plasticizing units considering wall-slippage : Part 1 : Wall-slippage in the melt film Type de document : texte imprimé Auteurs : H. Potente, Auteur ; M. Bornemann, Auteur ; M. Kurte-Jardin, Auteur Année de publication : 2009 Article en page(s) : p. 23-30 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couches minces
Films plastiques
Frottements (mécanique)
Matières plastiques -- Extrusion
PolymèresIndex. décimale : 668.9 Polymères Résumé : In single-screw extrusion the simulation of the plasticizing process by means of software tools becomes more and more important. These programs need mathematical models that have to be improved continuously to simulate the process values realistically. A two-part article presents an analytical approach to calculate the pressure/throughput and drive power behaviour of wall-slipping polymers in the melting section of single-screw plasticizing units. The investigations that are conducted are based on the notion commonly found in the literature of a melt film forming between the barrel and a compact solid bed, with the simultaneous development of a melt pool. As boundary condition for describing the wall slippage, a critical shear stress, as of which a slippage process commences, and also a slippage-velocity-dependent shear stress is assumed. In this first part of the publication, the investigations focus on the processes that take place in the melt film. A new model is developed for describing the process behaviour in this area. DOI : 10.3139/217.2163 En ligne : https://drive.google.com/file/d/1NFmuwpGWyKyi7GsHPLV8GWMqJwEr939O/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4204
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 1 (03/2009) . - p. 23-30[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011139 - Périodique Bibliothèque principale Documentaires Disponible Analytical model for the throughput and drive power calculation in the melting section of single screw plasticizing units considering wall-slippage / H. Potente in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 1 (03/2009)
[article]
Titre : Analytical model for the throughput and drive power calculation in the melting section of single screw plasticizing units considering wall-slippage : Part 2 : Wall-slippage in the melt pool and coupling of the system Type de document : texte imprimé Auteurs : H. Potente, Auteur ; M. Bornemann, Auteur ; M. Kurte-Jardin, Auteur Année de publication : 2009 Article en page(s) : p. 31-40 Note générale : Bibliogr. Langues : Anglais (eng) Catégories : Couches minces
Films plastiques
Frottements (mécanique)
Matières plastiques -- Extrusion
PolymèresIndex. décimale : 668.9 Polymères Résumé : A two-part article presents a process model developed at the KTP for describing the pressure/throughput and drive power behaviour of wall-slipping polymers in the melting section of single-screw plasticizing units. After a new model for describing the flow behaviour in the melt film was developed in the first part of the paper, this second part now covers the adaptation of an existing process model for pure melt conveyance to allow for the processes that take place in the melt pool, and the extension of the model to include the drive power calculation. Following this, the two individual models are then coupled through the assumption of a constant pressure gradient in the conveying direction. Using the overall model that is generated, the pressure/throughput and power behaviour during melting are investigated on the basis of the influencing dimensionless variables. This requires the geometry of the solid bed and the solid bed velocity to be specified as input variables. Apart from this, the other material parameters that need to be defined are the viscosity of the polymer melt, the critical shear stress, a material-specific parameter for describing the slipping-velocity-dependent shear stress and the operating point of the process that is taken as a basis. DOI : 10.3139/217.2164 En ligne : https://drive.google.com/file/d/1feemEa9GlLS8s0gso6jb7AjmJ11yozde/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=4205
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 1 (03/2009) . - p. 31-40[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011139 - Périodique Bibliothèque principale Documentaires Disponible Influence of power law and isothermal simplification on the accuracy in single screw extrusion / H. Potente in INTERNATIONAL POLYMER PROCESSING, Vol. XX, N° 4 (12/2005)
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Titre : Influence of power law and isothermal simplification on the accuracy in single screw extrusion Type de document : texte imprimé Auteurs : H. Potente, Auteur ; J. Pape, Auteur ; D. Heinrich, Auteur ; M. Bornemann, Auteur Année de publication : 2005 Article en page(s) : p. 417-422 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : For the mathematical modeling of single screw extruders crucial simplifications are frequently made. In order to estimate the quality of these models it is necessary to evaluate the differences resulting from these simplifying presumptions. This study refers to the influence of two frequently used simplifications, the power-law model and the assumption of an isothermal flow.
The differences due to the application of the power-law show an evident dependency on the descriptive material parameters. Depending on the Nahme-number the isothermal simplification proves partly clear differences from non-isothermal flows. These differences however are considerably reduced in the range of high Péclet-numbers.Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2967
in INTERNATIONAL POLYMER PROCESSING > Vol. XX, N° 4 (12/2005) . - p. 417-422[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 003422 - Périodique Bibliothèque principale Documentaires Disponible Investigations into kinematic reversal in non-isothermal flows in single-screw machines / H. Potente in INTERNATIONAL POLYMER PROCESSING, Vol. XXI, N° 2 (05/2006)
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Titre : Investigations into kinematic reversal in non-isothermal flows in single-screw machines Type de document : texte imprimé Auteurs : H. Potente, Auteur ; M. Bornemann, Auteur ; J. Pape, Auteur ; D. Heinrich, Auteur Année de publication : 2006 Article en page(s) : p. 116-120 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : When describing the flow in single-screw machines in mathematical terms, the screw is generally assumed to be standing still inside a rotating barrel. This study looks into whether and, if so, how far this principle of kinetic reversal falsifies the calculation result. It is performed both on an analytical basis and with the aid of comparative FEA simulations, taking the general case of a non-isothermal flow. It is shown that both kinematic boundary conditions lead to absolutely identical calculation results. DOI : 10.3139/217.0126 En ligne : https://drive.google.com/file/d/1EhQKHQNR6HA_TTFEoQ21QKSKr4cpdYjZ/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=2904
in INTERNATIONAL POLYMER PROCESSING > Vol. XXI, N° 2 (05/2006) . - p. 116-120[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 004675 - Périodique Bibliothèque principale Documentaires Disponible Modeling the temperature development of wall-slipping polymers in single-screw channels / M. Kurte-Jardin in INTERNATIONAL POLYMER PROCESSING, Vol. XXIV, N° 2 (05/2009)
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Titre : Modeling the temperature development of wall-slipping polymers in single-screw channels Type de document : texte imprimé Auteurs : M. Kurte-Jardin, Auteur ; H. Potente, Auteur ; K. Sigge, Auteur ; M. Bornemann, Auteur Année de publication : 2009 Article en page(s) : p. 106-113 Note générale : Bibliogr. Langues : Anglais (eng) Index. décimale : 668.9 Polymères Résumé : Wall-slipping materials show lower melt temperature increase than wall-adhering materials on account of the reduced dissipated power component in the system, as is set out in Potente and Kurte-Jardin (2005) and Potente et al. (2005a). Up until now, however, there have not been any models for describing the development of the melt temperature in a single-screw channel when wall-slipping polymers are being processed. For this reason, a methodology of predicting the melt temperature is described. The new model is based on an existing analytical procedure that has been extended by numerical flow simulation results of isothermal 2,5D FE calculations. A comparison of the predicted mean melt temperatures with non-isothermal 3D FE flow simulation results leads to good agreement, what justifies further investigations. DOI : 10.3139/217.2125 En ligne : https://drive.google.com/file/d/1cqzdYrwgYONaTlhUuGEol8Al6xNFLUGO/view?usp=drive [...] Format de la ressource électronique : Permalink : https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=5222
in INTERNATIONAL POLYMER PROCESSING > Vol. XXIV, N° 2 (05/2009) . - p. 106-113[article]Réservation
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Code-barres Cote Support Localisation Section Disponibilité 011293 - Périodique Bibliothèque principale Documentaires Disponible Non-isothermal model for the drive power calculation of single-screw plasticating units / H. Potente in INTERNATIONAL POLYMER PROCESSING, Vol. XXIII, N° 3 (07/2008)
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