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Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow

J. E. López-Aguilar, H. R. Tamaddon-Jahromi, M. F. Webster, K. Walters, Michael Webster Orcid Logo, Hamid Tamaddon-Jahromi

Physics of Fluids, Volume: 28, Issue: 10, Start page: 103104

Swansea University Authors: Michael Webster Orcid Logo, Hamid Tamaddon-Jahromi

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DOI (Published version): 10.1063/1.4966022

Abstract

This paper addresses the problem of matching experimental findings with numerical prediction for the extreme experimental levels of pressure-drops observed in the 4:1 sharp-corner contraction flows, as reported by Nigen and Walters [“Viscoelastic contraction flows: Comparison of axisymmetric and pla...

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Published in: Physics of Fluids
ISSN: 1070-6631 1089-7666
Published: 2016
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URI: https://cronfa.swan.ac.uk/Record/cronfa31238
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spelling 2016-11-25T10:04:55.0012964 v2 31238 2016-11-25 Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow b6a811513b34d56e66489512fc2c6c61 0000-0002-7722-821X Michael Webster Michael Webster true false b3a1417ca93758b719acf764c7ced1c5 Hamid Tamaddon-Jahromi Hamid Tamaddon-Jahromi true false 2016-11-25 EEN This paper addresses the problem of matching experimental findings with numerical prediction for the extreme experimental levels of pressure-drops observed in the 4:1 sharp-corner contraction flows, as reported by Nigen and Walters [“Viscoelastic contraction flows: Comparison of axisymmetric and planar configurations,” J. Non- Newtonian Fluid Mech. 102, 343–359 (2002)]. In this connection, we report on significant success in achieving quantitative agreement between predictions and experiments. This has been made possible by using a new swanINNFM model, employing an additional dissipative function. Notably, one can observe that extremely large pressure-drops may be attained with a suitable selection of the extensional viscous time scale. In addition, and on vortex structure, the early and immediate vortex enhancement for Boger fluids in axisymmetric contractions has also been reproduced, which is shown to be absent in planar counterparts. Journal Article Physics of Fluids 28 10 103104 1070-6631 1089-7666 31 12 2016 2016-12-31 10.1063/1.4966022 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2016-11-25T10:04:55.0012964 2016-11-25T10:03:29.3246098 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised J. E. López-Aguilar 1 H. R. Tamaddon-Jahromi 2 M. F. Webster 3 K. Walters 4 Michael Webster 0000-0002-7722-821X 5 Hamid Tamaddon-Jahromi 6 0031238-25112016100441.pdf lopez-aguilar2016(1)v2.pdf 2016-11-25T10:04:41.7570000 Output 2465979 application/pdf Accepted Manuscript true 2016-11-25T00:00:00.0000000 false
title Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
spellingShingle Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
Michael Webster
Hamid Tamaddon-Jahromi
title_short Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
title_full Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
title_fullStr Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
title_full_unstemmed Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
title_sort Numerical vs experimental pressure drops for Boger fluids in sharp-corner contraction flow
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 J. E. López-Aguilar
H. R. Tamaddon-Jahromi
M. F. Webster
K. Walters
Michael Webster
Hamid Tamaddon-Jahromi
format Journal article
container_title Physics of Fluids
container_volume 28
container_issue 10
container_start_page 103104
publishDate 2016
institution Swansea University
issn 1070-6631
1089-7666
doi_str_mv 10.1063/1.4966022
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 1
active_str 0
description This paper addresses the problem of matching experimental findings with numerical prediction for the extreme experimental levels of pressure-drops observed in the 4:1 sharp-corner contraction flows, as reported by Nigen and Walters [“Viscoelastic contraction flows: Comparison of axisymmetric and planar configurations,” J. Non- Newtonian Fluid Mech. 102, 343–359 (2002)]. In this connection, we report on significant success in achieving quantitative agreement between predictions and experiments. This has been made possible by using a new swanINNFM model, employing an additional dissipative function. Notably, one can observe that extremely large pressure-drops may be attained with a suitable selection of the extensional viscous time scale. In addition, and on vortex structure, the early and immediate vortex enhancement for Boger fluids in axisymmetric contractions has also been reproduced, which is shown to be absent in planar counterparts.
published_date 2016-12-31T03:38:08Z
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score 11.012678

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