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Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios

Jose Lopez Aguilar, Hamid Tamaddon Jahromi

Fluids, Volume: 5, Issue: 2, Start page: 85

Swansea University Authors: Jose Lopez Aguilar, Hamid Tamaddon Jahromi

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DOI (Published version): 10.3390/fluids5020085

Abstract

This work puts forward a modeling study contrasted against experimental, with focus on abrupt circular contraction flow of two highly-elastic constant shear-viscosity Boger fluids, i.e. a polyacrylamide dissolved in corn-syrup PAA/CS (Fluid-1) and a polyisobutylene dissolved in polybutene PIB/PB (Fl...

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Published in: Fluids
ISSN: 2311-5521
Published: MDPI AG 2020
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URI: https://cronfa.swan.ac.uk/Record/cronfa54461
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last_indexed 2020-07-22T19:17:35Z
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spelling 2020-07-22T13:39:58.6237464 v2 54461 2020-06-12 Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios f3a4e2262c131d5cbd3730d0009bada7 Jose Lopez Aguilar Jose Lopez Aguilar true false b3a1417ca93758b719acf764c7ced1c5 Hamid Tamaddon Jahromi Hamid Tamaddon Jahromi true false 2020-06-12 This work puts forward a modeling study contrasted against experimental, with focus on abrupt circular contraction flow of two highly-elastic constant shear-viscosity Boger fluids, i.e. a polyacrylamide dissolved in corn-syrup PAA/CS (Fluid-1) and a polyisobutylene dissolved in polybutene PIB/PB (Fluid-2), in various contraction-ratio geometries. Moreover, this work goes hand-in-hand with the counterpart matching of experimental pressure-drops observed in such 4:1 and 8:1 aspect-ratio contraction flows, as described experimentally in the literature. In this study, the experimental findings, for Boger fluids with severe strain-hardening features, reveal significant vortex-evolution characteristics, correlated with enhanced pressure-drop phasing and normal-stress response in the corner region. It is shown how such behavior may be replicated through simulation and the rheological dependencies that are necessary to bring this about. Predictive solutions with an advanced hybrid finite-element/volume (fe/fv) algorithm are able to elucidate the rheological properties (extensional viscosity and normal-stress response) that rule such vortex-enhancement evolution. This is accomplished by employing the novel swanINNFM(q) family of fluids, through the swIM model-variant, with its strong and efficient control on elongational properties. Journal Article Fluids 5 2 85 MDPI AG 2311-5521 31 5 2020 2020-05-31 10.3390/fluids5020085 COLLEGE NANME COLLEGE CODE Swansea University 2020-07-22T13:39:58.6237464 2020-06-12T10:38:47.4384639 Jose Lopez Aguilar 1 Hamid Tamaddon Jahromi 2 54461__17481__e3554de746724b82baa4dfdd343e75e4.pdf 54461.pdf 2020-06-12T10:41:59.5782146 Output 7632630 application/pdf Version of Record true This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited true https://creativecommons.org/licenses/by/4.0/
title Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
spellingShingle Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
Jose Lopez Aguilar
Hamid Tamaddon Jahromi
title_short Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
title_full Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
title_fullStr Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
title_full_unstemmed Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
title_sort Computational Predictions for Boger Fluids and Circular Contraction Flow under Various Aspect Ratios
author_id_str_mv f3a4e2262c131d5cbd3730d0009bada7
b3a1417ca93758b719acf764c7ced1c5
author_id_fullname_str_mv f3a4e2262c131d5cbd3730d0009bada7_***_Jose Lopez Aguilar
b3a1417ca93758b719acf764c7ced1c5_***_Hamid Tamaddon Jahromi
author Jose Lopez Aguilar
Hamid Tamaddon Jahromi
author2 Jose Lopez Aguilar
Hamid Tamaddon Jahromi
format Journal article
container_title Fluids
container_volume 5
container_issue 2
container_start_page 85
publishDate 2020
institution Swansea University
issn 2311-5521
doi_str_mv 10.3390/fluids5020085
publisher MDPI AG
document_store_str 1
active_str 0
description This work puts forward a modeling study contrasted against experimental, with focus on abrupt circular contraction flow of two highly-elastic constant shear-viscosity Boger fluids, i.e. a polyacrylamide dissolved in corn-syrup PAA/CS (Fluid-1) and a polyisobutylene dissolved in polybutene PIB/PB (Fluid-2), in various contraction-ratio geometries. Moreover, this work goes hand-in-hand with the counterpart matching of experimental pressure-drops observed in such 4:1 and 8:1 aspect-ratio contraction flows, as described experimentally in the literature. In this study, the experimental findings, for Boger fluids with severe strain-hardening features, reveal significant vortex-evolution characteristics, correlated with enhanced pressure-drop phasing and normal-stress response in the corner region. It is shown how such behavior may be replicated through simulation and the rheological dependencies that are necessary to bring this about. Predictive solutions with an advanced hybrid finite-element/volume (fe/fv) algorithm are able to elucidate the rheological properties (extensional viscosity and normal-stress response) that rule such vortex-enhancement evolution. This is accomplished by employing the novel swanINNFM(q) family of fluids, through the swIM model-variant, with its strong and efficient control on elongational properties.
published_date 2020-05-31T05:13:18Z
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score 11.352235

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