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Numerical simulation of tube-tooling cable-coating with polymer melts

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

Korea-Australia Rheology Journal, Volume: 25, Issue: 4, Pages: 197 - 216

Swansea University Author: Michael Webster Orcid Logo

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DOI (Published version): 10.1007/s13367-013-0021-x

Abstract

This study investigates the numerical solution of viscous and viscoelastic flows for tube-tooling die-extrusion coating using a hybrid finite element/finite volume discretisation (fe/fv). Such a complex polymer melt extrusion-draw-coating flow displays a dynamic contact line, slip, die-swell and two s...

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Published in: Korea-Australia Rheology Journal
Published: 2013
URI: https://cronfa.swan.ac.uk/Record/cronfa24194
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first_indexed 2015-11-09T11:28:12Z
last_indexed 2018-02-09T05:03:42Z
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spelling 2015-11-08T20:00:36.2488888 v2 24194 2015-11-08 Numerical simulation of tube-tooling cable-coating with polymer melts b6a811513b34d56e66489512fc2c6c61 0000-0002-7722-821X Michael Webster Michael Webster true false 2015-11-08 EEN This study investigates the numerical solution of viscous and viscoelastic flows for tube-tooling die-extrusion coating using a hybrid finite element/finite volume discretisation (fe/fv). Such a complex polymer melt extrusion-draw-coating flow displays a dynamic contact line, slip, die-swell and two separate free-surfaces, presenting an inner and outer conduit surface to the melt-coating. The practical interest lies in determining efficient windows for process control over variation in material properties, stressing levels generated and vacuum pressure levels imposed. The impact of shear-thinning is also considered. Extensive reference is made throughout to viscous inelastic counterpart solutions. Attention is paid to the influence and variation in relevant parameters of Weissenberg number (We), solvent-fraction (β) and second normal difference (N2) (ξ parameter for EPTT). The impact of model choice and parameters upon field response is described in situ through, pressure-drops, rates of deformation and stress. Various numerical alternative strategies, their stability and convergence issues are also addressed. The numerical scheme solves the momentum-continuity-surface equations by a semi-implicit time-stepping Taylor-Galerkin/pressure-correction (TGPC) finite element (parent-cell) method, whilst invoking a sub-cell cell-vertex fluctuation distribution finite volume scheme for the constitutive stress equation. The hyperbolic aspects of the constitutive equation are addressed discretely through upwind Fluctuation Distribution techniques, whilst temporal and source terms are consistently accommodated through medium-dual-cell schemes. The dynamic solution of the moving boundary problem may be resolved by either separating the solution process for each free-surface section (decoupling), or coupling both sections and solving simultaneously. Each involves a surface height location method, with dependency on surface nodal velocities and surface element sections; two such schemes are investigated. Dedicated and localised shock-capturing techniques are introduced to handle solution singularities as disclosed by die-swell, slip and moving contact lines. Journal Article Korea-Australia Rheology Journal 25 4 197 216 Tube tooling, cable coating, draw-down ratio, die extrusion, free surface, finite element/volume viscoelastic modelling 31 12 2013 2013-12-31 10.1007/s13367-013-0021-x COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2015-11-08T20:00:36.2488888 2015-11-08T19:54:38.6633966 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised A. Al-Muslimawi 1 H. R. Tamaddon-Jahromi 2 M. F. Webster 3 Michael Webster 0000-0002-7722-821X 4
title Numerical simulation of tube-tooling cable-coating with polymer melts
spellingShingle Numerical simulation of tube-tooling cable-coating with polymer melts
Michael Webster
title_short Numerical simulation of tube-tooling cable-coating with polymer melts
title_full Numerical simulation of tube-tooling cable-coating with polymer melts
title_fullStr Numerical simulation of tube-tooling cable-coating with polymer melts
title_full_unstemmed Numerical simulation of tube-tooling cable-coating with polymer melts
title_sort Numerical simulation of tube-tooling cable-coating 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
M. F. Webster
Michael Webster
format Journal article
container_title Korea-Australia Rheology Journal
container_volume 25
container_issue 4
container_start_page 197
publishDate 2013
institution Swansea University
doi_str_mv 10.1007/s13367-013-0021-x
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 study investigates the numerical solution of viscous and viscoelastic flows for tube-tooling die-extrusion coating using a hybrid finite element/finite volume discretisation (fe/fv). Such a complex polymer melt extrusion-draw-coating flow displays a dynamic contact line, slip, die-swell and two separate free-surfaces, presenting an inner and outer conduit surface to the melt-coating. The practical interest lies in determining efficient windows for process control over variation in material properties, stressing levels generated and vacuum pressure levels imposed. The impact of shear-thinning is also considered. Extensive reference is made throughout to viscous inelastic counterpart solutions. Attention is paid to the influence and variation in relevant parameters of Weissenberg number (We), solvent-fraction (β) and second normal difference (N2) (ξ parameter for EPTT). The impact of model choice and parameters upon field response is described in situ through, pressure-drops, rates of deformation and stress. Various numerical alternative strategies, their stability and convergence issues are also addressed. The numerical scheme solves the momentum-continuity-surface equations by a semi-implicit time-stepping Taylor-Galerkin/pressure-correction (TGPC) finite element (parent-cell) method, whilst invoking a sub-cell cell-vertex fluctuation distribution finite volume scheme for the constitutive stress equation. The hyperbolic aspects of the constitutive equation are addressed discretely through upwind Fluctuation Distribution techniques, whilst temporal and source terms are consistently accommodated through medium-dual-cell schemes. The dynamic solution of the moving boundary problem may be resolved by either separating the solution process for each free-surface section (decoupling), or coupling both sections and solving simultaneously. Each involves a surface height location method, with dependency on surface nodal velocities and surface element sections; two such schemes are investigated. Dedicated and localised shock-capturing techniques are introduced to handle solution singularities as disclosed by die-swell, slip and moving contact lines.
published_date 2013-12-31T03:28:39Z
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score 11.036006

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