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On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures
Journal of Non-Newtonian Fluid Mechanics
Swansea University Authors:
Michael Webster , Hamid Tamaddon-Jahromi
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DOI (Published version): 10.1016/j.jnnfm.2017.11.006
Abstract
This study compares and contrasts computational predictions against experimental data for some viscoelastic contraction flows. Nigen and Walters (2002) [1], provides the comparative data-set, the specific flow of interest is an 8:1 abrupt circular contraction, and the constitutive model is that of s...
Published in: | Journal of Non-Newtonian Fluid Mechanics |
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ISSN: | 0377-0257 |
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2017
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URI: | https://cronfa.swan.ac.uk/Record/cronfa37028 |
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2020-06-03T14:19:20.6344382 v2 37028 2017-11-23 On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures b6a811513b34d56e66489512fc2c6c61 0000-0002-7722-821X Michael Webster Michael Webster true false b3a1417ca93758b719acf764c7ced1c5 Hamid Tamaddon-Jahromi Hamid Tamaddon-Jahromi true false 2017-11-23 EEN This study compares and contrasts computational predictions against experimental data for some viscoelastic contraction flows. Nigen and Walters (2002) [1], provides the comparative data-set, the specific flow of interest is an 8:1 abrupt circular contraction, and the constitutive model is that of swanINNFM(q) [swIM]. Taken against increasing flow-rate, such a model is observed to capture significant vortex-enhancement in these axisymmetric flows, reflecting well the counterpart experimental findings. In addition, rich vortex characteristics are reflected, through evolving patterns of salient-corner, lip-vortex and elastic-corner vortices. A systematic parametric analysis is conducted over three independent and governing material parameters in the model, whilst attempting to interpret rheological adjustment against such changes in flow-structure. Specifically, this has involved variation in solvent-fraction (β), finite-extensibility parameter (L), and extensional-based dissipative parameter (λD). Journal Article Journal of Non-Newtonian Fluid Mechanics 0377-0257 Experimental data vs numerical predictions; Boger fluids; flow-structure and pressure-drop; circular contraction flow; lip-, salient- and elastic-corner vortices; swIM model 31 12 2017 2017-12-31 10.1016/j.jnnfm.2017.11.006 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2020-06-03T14:19:20.6344382 2017-11-23T11:02:27.3054145 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised H.R. Tamaddon-Jahromi 1 J.E. López-Aguilar 2 M.F. Webster 3 Michael Webster 0000-0002-7722-821X 4 Hamid Tamaddon-Jahromi 5 0037028-23112017110541.pdf tamaddon-jahromi2017.pdf 2017-11-23T11:05:41.7030000 Output 4276212 application/pdf Accepted Manuscript true 2018-11-21T00:00:00.0000000 false eng |
title |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures |
spellingShingle |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures Michael Webster Hamid Tamaddon-Jahromi |
title_short |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures |
title_full |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures |
title_fullStr |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures |
title_full_unstemmed |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures |
title_sort |
On modelling viscoelastic flow through abrupt circular 8:1 contractions – matching experimental pressure-drops and vortex structures |
author_id_str_mv |
b6a811513b34d56e66489512fc2c6c61 b3a1417ca93758b719acf764c7ced1c5 |
author_id_fullname_str_mv |
b6a811513b34d56e66489512fc2c6c61_***_Michael Webster b3a1417ca93758b719acf764c7ced1c5_***_Hamid Tamaddon-Jahromi |
author |
Michael Webster Hamid Tamaddon-Jahromi |
author2 |
H.R. Tamaddon-Jahromi J.E. López-Aguilar M.F. Webster Michael Webster Hamid Tamaddon-Jahromi |
format |
Journal article |
container_title |
Journal of Non-Newtonian Fluid Mechanics |
publishDate |
2017 |
institution |
Swansea University |
issn |
0377-0257 |
doi_str_mv |
10.1016/j.jnnfm.2017.11.006 |
college_str |
Faculty of Science and Engineering |
hierarchytype |
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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 |
1 |
active_str |
0 |
description |
This study compares and contrasts computational predictions against experimental data for some viscoelastic contraction flows. Nigen and Walters (2002) [1], provides the comparative data-set, the specific flow of interest is an 8:1 abrupt circular contraction, and the constitutive model is that of swanINNFM(q) [swIM]. Taken against increasing flow-rate, such a model is observed to capture significant vortex-enhancement in these axisymmetric flows, reflecting well the counterpart experimental findings. In addition, rich vortex characteristics are reflected, through evolving patterns of salient-corner, lip-vortex and elastic-corner vortices. A systematic parametric analysis is conducted over three independent and governing material parameters in the model, whilst attempting to interpret rheological adjustment against such changes in flow-structure. Specifically, this has involved variation in solvent-fraction (β), finite-extensibility parameter (L), and extensional-based dissipative parameter (λD). |
published_date |
2017-12-31T03:46:32Z |
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1763752219365081088 |
score |
11.021648 |