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Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts

A. Al-Muslimawi, H.R. Tamaddon-Jahromi, Michael Webster Orcid Logo

Applied Rheology, Volume: 24, Start page: 34188

Swansea University Author: Michael Webster Orcid Logo

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DOI (Published version): 10.3933/ApplRheol-24-34188

Abstract

This paper is concerned with the numerical solution of polymer melt flows of both extrudate-swell and tube-tooling die-extrusion coatings, using a hybrid finite element/finite volume discretisation (fe/fv). Extrudate-swell presents a single dynamic free-surface, whilst the complex polymer melt coating...

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Published in: Applied Rheology
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa24193
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spelling 2016-04-29T16:10:05.5647643 v2 24193 2015-11-08 Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts b6a811513b34d56e66489512fc2c6c61 0000-0002-7722-821X Michael Webster Michael Webster true false 2015-11-08 EEN This paper is concerned with the numerical solution of polymer melt flows of both extrudate-swell and tube-tooling die-extrusion coatings, using a hybrid finite element/finite volume discretisation (fe/fv). Extrudate-swell presents a single dynamic free-surface, whilst the complex polymer melt coating flow exhibit two separate free-surface draw-down sections to model, an inner and outer conduit surface of the melt. The interest lies in determining efficient windows for process control over variation in material properties, stressing levels generated and pressure drop. In this respect, major rheological influences are evaluated on the numerical predictions generated of the extensional viscosity and Trouton ratio, when comparing solution response for an exponential Phan-Thien Tanner (EPTT, network-based) model to that for a single extended pom-pom (SXPP, kinematic-based) model. The impact of shear-thinning is also considered. Attention is paid to the influence and variation in Weissenberg number (We), solvent-fraction (β, polymeric concentration) and second normal stress difference (N2) (ξ parameter for both EPTT and SXPP, and anisotropy parameter for SXPP). The influence of model choice and parameters upon field response is described in situ through, pressure, shear and strain-rates and stress. The numerical scheme solves the momentum-continuity-surface equations by a semi-implicit time-stepping incremental Taylor-Galerkin/pressure-correction finite element method, whilst invoking a cell-vertex fluctuation distribution/median-dual-cell finite volume approximation for the first-order space-time hyperbolic-type stress evolution equation. Journal Article Applied Rheology 24 34188 Taylor-Galerkin, tube-tooling, cable-coating, die-extrusion, free-surface, exponential Phan-Thien Tanner model, Single extended pom-pom model 31 7 2014 2014-07-31 10.3933/ApplRheol-24-34188 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2016-04-29T16:10:05.5647643 2015-11-08T19:48:57.8636120 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised A. Al-Muslimawi 1 H.R. Tamaddon-Jahromi 2 Michael Webster 0000-0002-7722-821X 3
title Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
spellingShingle Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
Michael Webster
title_short Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
title_full Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
title_fullStr Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
title_full_unstemmed Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
title_sort Numerical computation of extrusion and draw-extrusion cable-coating flows with polymer melts
author_id_str_mv b6a811513b34d56e66489512fc2c6c61
author_id_fullname_str_mv b6a811513b34d56e66489512fc2c6c61_***_Michael Webster
author Michael Webster
author2 A. Al-Muslimawi
H.R. Tamaddon-Jahromi
Michael Webster
format Journal article
container_title Applied Rheology
container_volume 24
container_start_page 34188
publishDate 2014
institution Swansea University
doi_str_mv 10.3933/ApplRheol-24-34188
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised
document_store_str 0
active_str 0
description This paper is concerned with the numerical solution of polymer melt flows of both extrudate-swell and tube-tooling die-extrusion coatings, using a hybrid finite element/finite volume discretisation (fe/fv). Extrudate-swell presents a single dynamic free-surface, whilst the complex polymer melt coating flow exhibit two separate free-surface draw-down sections to model, an inner and outer conduit surface of the melt. The interest lies in determining efficient windows for process control over variation in material properties, stressing levels generated and pressure drop. In this respect, major rheological influences are evaluated on the numerical predictions generated of the extensional viscosity and Trouton ratio, when comparing solution response for an exponential Phan-Thien Tanner (EPTT, network-based) model to that for a single extended pom-pom (SXPP, kinematic-based) model. The impact of shear-thinning is also considered. Attention is paid to the influence and variation in Weissenberg number (We), solvent-fraction (β, polymeric concentration) and second normal stress difference (N2) (ξ parameter for both EPTT and SXPP, and anisotropy parameter for SXPP). The influence of model choice and parameters upon field response is described in situ through, pressure, shear and strain-rates and stress. The numerical scheme solves the momentum-continuity-surface equations by a semi-implicit time-stepping incremental Taylor-Galerkin/pressure-correction finite element method, whilst invoking a cell-vertex fluctuation distribution/median-dual-cell finite volume approximation for the first-order space-time hyperbolic-type stress evolution equation.
published_date 2014-07-31T03:28:39Z
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score 11.012813

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