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Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions

S.O.S. Echendu, H.R. Tamaddon-Jahromi, M.F. Webster, Michael Webster Orcid Logo

Journal of Non-Newtonian Fluid Mechanics, Volume: 214, Pages: 38 - 56

Swansea University Author: Michael Webster Orcid Logo

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DOI (Published version): 10.1016/j.jnnfm.2014.09.013

Abstract

Viscoelastic FENE and PTT constitutive models are considered in the simulation of high-speed reverse roll coating flow with polymeric paint solutions, where wetting lines and air-entrainment are incorporated. Both FENE-CR and FENE-P models are utilised to illustrate the influence of shear-thinning i...

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Published in: Journal of Non-Newtonian Fluid Mechanics
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa24189
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first_indexed 2015-11-09T11:28:11Z
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spelling 2016-04-29T16:14:03.7984727 v2 24189 2015-11-08 Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions b6a811513b34d56e66489512fc2c6c61 0000-0002-7722-821X Michael Webster Michael Webster true false 2015-11-08 EEN Viscoelastic FENE and PTT constitutive models are considered in the simulation of high-speed reverse roll coating flow with polymeric paint solutions, where wetting lines and air-entrainment are incorporated. Both FENE-CR and FENE-P models are utilised to illustrate the influence of shear-thinning in the context of strain-hardening properties. Strain-softening is introduced via PTT solutions in contrast. Steady solutions are derived numerically through a time-stepping hybrid finite element-finite volume sub-cell algorithm with dynamic free-surface location, drawing upon a fractional staged, predictor-corrector, and semi-implicit time-stepping procedure. A systematic computational and rheological study allows for parametric variation in elasticity (Wi-variation), level of strain-hardening (AL), shear-thinning and solvent fraction (β). Various problem aspects are investigated to reveal the influence of viscoelasticity on vortex developments, pressure and lift profiles, shear and strain-rates, and critical stress states. Specific features of viscoelastic flow response are observed by analysing stress and flow structures over a range of Weissenberg numbers. The novel aspects of the work lie in the application of the algorithm to the reverse roll coating process under such viscoelastic fluid models. Journal Article Journal of Non-Newtonian Fluid Mechanics 214 38 56 Reverse roll coating, dynamic wetting, finite element/finite volume sub-cell, viscoelastic FENE models, shear and extensional flow. 30 9 2014 2014-09-30 10.1016/j.jnnfm.2014.09.013 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2016-04-29T16:14:03.7984727 2015-11-08T19:06:21.5220253 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised S.O.S. Echendu 1 H.R. Tamaddon-Jahromi 2 M.F. Webster 3 Michael Webster 0000-0002-7722-821X 4
title Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
spellingShingle Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
Michael Webster
title_short Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
title_full Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
title_fullStr Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
title_full_unstemmed Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
title_sort Modelling polymeric flows in reverse roll coating processes with dynamic wetting lines and air-entrainment: FENE and PTT solutions
author_id_str_mv b6a811513b34d56e66489512fc2c6c61
author_id_fullname_str_mv b6a811513b34d56e66489512fc2c6c61_***_Michael Webster
author Michael Webster
author2 S.O.S. Echendu
H.R. Tamaddon-Jahromi
M.F. Webster
Michael Webster
format Journal article
container_title Journal of Non-Newtonian Fluid Mechanics
container_volume 214
container_start_page 38
publishDate 2014
institution Swansea University
doi_str_mv 10.1016/j.jnnfm.2014.09.013
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 Viscoelastic FENE and PTT constitutive models are considered in the simulation of high-speed reverse roll coating flow with polymeric paint solutions, where wetting lines and air-entrainment are incorporated. Both FENE-CR and FENE-P models are utilised to illustrate the influence of shear-thinning in the context of strain-hardening properties. Strain-softening is introduced via PTT solutions in contrast. Steady solutions are derived numerically through a time-stepping hybrid finite element-finite volume sub-cell algorithm with dynamic free-surface location, drawing upon a fractional staged, predictor-corrector, and semi-implicit time-stepping procedure. A systematic computational and rheological study allows for parametric variation in elasticity (Wi-variation), level of strain-hardening (AL), shear-thinning and solvent fraction (β). Various problem aspects are investigated to reveal the influence of viscoelasticity on vortex developments, pressure and lift profiles, shear and strain-rates, and critical stress states. Specific features of viscoelastic flow response are observed by analysing stress and flow structures over a range of Weissenberg numbers. The novel aspects of the work lie in the application of the algorithm to the reverse roll coating process under such viscoelastic fluid models.
published_date 2014-09-30T03:28:38Z
_version_ 1763751094054289408
score 11.012723

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