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Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow

J. Esteban López-Aguilar Orcid Logo, Hamid Tamaddon Jahromi, Octavio Manero Orcid Logo

Physics of Fluids, Volume: 35, Issue: 6

Swansea University Author: Hamid Tamaddon Jahromi

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DOI (Published version): 10.1063/5.0143432

Abstract

This study focuses on computational modeling of shear-banded wormlike micellar solutions (WLM) in a complex planar Couette flow, driven by a moving top plate over a rounded-corner 4:1:4 obstruction. The BMP+_τp model is used, which is constructed within an Oldroyd-B-like form, coupled with a thixotr...

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Published in: Physics of Fluids
ISSN: 1070-6631 1089-7666
Published: AIP Publishing 2023
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URI: https://cronfa.swan.ac.uk/Record/cronfa63707
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Solute energy dissipation drives fluid-structure adjustment in a construction-destruction dynamics affected by viscoelasticity. This model reproduces conventional WLM features, such as shear thinning, extensional hardening/softening, viscoelasticity, apparent yield stress, and shear banding, with a bounded extensional viscosity and an N1Shear upturn at high deformation rates. The BMP+_τp characterization for shear banding is based on extremely low solvent fractions and appropriate shear-banding intensity parameters. Flow structure is analyzed through velocity, stress, and fluidity, whereupon banded and non-banded response is contrasted at appropriately selected flow rates. Solutions are obtained with our hybrid fe-fv algorithm, capturing essential shear-banded flow features reported experimentally. For a fluid exhibiting banding, banded solutions are generated at a flow rate within the flow curve unstable branch. In the fully developed simple shear flow regions, a split velocity profile is observed, with different viscosity bands at equal stress levels, enhanced with a shock-capture procedure. Non-banded solutions are derived for the lowest and highest flow rates sampled, located in the stable branches. Within the constriction zone, banded profiles are lost due to the mixed non-homogeneous deformation. Shear-banding fluids display less intense viscosity/stress features, correlated with their relatively stronger shear thinning response. 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spelling v2 63707 2023-06-26 Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow b3a1417ca93758b719acf764c7ced1c5 Hamid Tamaddon Jahromi Hamid Tamaddon Jahromi true false 2023-06-26 AERO This study focuses on computational modeling of shear-banded wormlike micellar solutions (WLM) in a complex planar Couette flow, driven by a moving top plate over a rounded-corner 4:1:4 obstruction. The BMP+_τp model is used, which is constructed within an Oldroyd-B-like form, coupled with a thixotropic fluidity-based structure equation. Solute energy dissipation drives fluid-structure adjustment in a construction-destruction dynamics affected by viscoelasticity. This model reproduces conventional WLM features, such as shear thinning, extensional hardening/softening, viscoelasticity, apparent yield stress, and shear banding, with a bounded extensional viscosity and an N1Shear upturn at high deformation rates. The BMP+_τp characterization for shear banding is based on extremely low solvent fractions and appropriate shear-banding intensity parameters. Flow structure is analyzed through velocity, stress, and fluidity, whereupon banded and non-banded response is contrasted at appropriately selected flow rates. Solutions are obtained with our hybrid fe-fv algorithm, capturing essential shear-banded flow features reported experimentally. For a fluid exhibiting banding, banded solutions are generated at a flow rate within the flow curve unstable branch. In the fully developed simple shear flow regions, a split velocity profile is observed, with different viscosity bands at equal stress levels, enhanced with a shock-capture procedure. Non-banded solutions are derived for the lowest and highest flow rates sampled, located in the stable branches. Within the constriction zone, banded profiles are lost due to the mixed non-homogeneous deformation. Shear-banding fluids display less intense viscosity/stress features, correlated with their relatively stronger shear thinning response. The constriction resistance provokes a pressure-level adjustment, leading to fully developed Couette-like constant values upstream-downstream. Journal Article Physics of Fluids 35 6 AIP Publishing 1070-6631 1089-7666 30 6 2023 2023-06-30 10.1063/5.0143432 http://dx.doi.org/10.1063/5.0143432 COLLEGE NANME Aerospace Engineering COLLEGE CODE AERO Swansea University Another institution paid the OA fee Consejo Nacional de Ciencia y Tecnología [CONAHCYT, Mexico—Grant No. CF-2023-I-318 “Reología computacional de fluidos complejos: determinación de propiedades reológicas extensionales de mucosa y generación de biomarcadores para la prevención y tratamiento de enfermedades respiratorias (COVID-19 y EPOC)”] Universidad Nacional Autónoma de México UNAM (Grant Nos. PAPIIT IA102022 and PAIP 5000-9172 Facultad de Química). UNAM under the project with Grant No. PAPIIT IN100623. Published open access through an agreement with Centro de Informacion Cientifica y Humanistica 2023-09-07T17:10:22.5359923 2023-06-26T13:48:26.9300599 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised J. Esteban López-Aguilar 0000-0002-0308-3994 1 Hamid Tamaddon Jahromi 2 Octavio Manero 0000-0001-6633-1070 3 63707__28116__fd79098e7044480d8181bf882cc15a4f.pdf 63707 AA.pdf 2023-07-13T14:31:57.3435292 Output 2136369 application/pdf Accepted Manuscript true true eng 63707__28434__9ac7fe00c7914f7488bfec0db1aa271b.pdf 63707 vor.pdf 2023-09-04T11:38:42.3723326 Output 5688794 application/pdf Version of Record true VC 2023 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). false eng http:// creativecommons.org/licenses/by/4.0/
title Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
spellingShingle Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
Hamid Tamaddon Jahromi
title_short Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
title_full Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
title_fullStr Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
title_full_unstemmed Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
title_sort Shear banding predictions for wormlike micellar systems under a contraction–expansion complex flow
author_id_str_mv b3a1417ca93758b719acf764c7ced1c5
author_id_fullname_str_mv b3a1417ca93758b719acf764c7ced1c5_***_Hamid Tamaddon Jahromi
author Hamid Tamaddon Jahromi
author2 J. Esteban López-Aguilar
Hamid Tamaddon Jahromi
Octavio Manero
format Journal article
container_title Physics of Fluids
container_volume 35
container_issue 6
publishDate 2023
institution Swansea University
issn 1070-6631
1089-7666
doi_str_mv 10.1063/5.0143432
publisher AIP Publishing
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
url http://dx.doi.org/10.1063/5.0143432
document_store_str 1
active_str 0
description This study focuses on computational modeling of shear-banded wormlike micellar solutions (WLM) in a complex planar Couette flow, driven by a moving top plate over a rounded-corner 4:1:4 obstruction. The BMP+_τp model is used, which is constructed within an Oldroyd-B-like form, coupled with a thixotropic fluidity-based structure equation. Solute energy dissipation drives fluid-structure adjustment in a construction-destruction dynamics affected by viscoelasticity. This model reproduces conventional WLM features, such as shear thinning, extensional hardening/softening, viscoelasticity, apparent yield stress, and shear banding, with a bounded extensional viscosity and an N1Shear upturn at high deformation rates. The BMP+_τp characterization for shear banding is based on extremely low solvent fractions and appropriate shear-banding intensity parameters. Flow structure is analyzed through velocity, stress, and fluidity, whereupon banded and non-banded response is contrasted at appropriately selected flow rates. Solutions are obtained with our hybrid fe-fv algorithm, capturing essential shear-banded flow features reported experimentally. For a fluid exhibiting banding, banded solutions are generated at a flow rate within the flow curve unstable branch. In the fully developed simple shear flow regions, a split velocity profile is observed, with different viscosity bands at equal stress levels, enhanced with a shock-capture procedure. Non-banded solutions are derived for the lowest and highest flow rates sampled, located in the stable branches. Within the constriction zone, banded profiles are lost due to the mixed non-homogeneous deformation. Shear-banding fluids display less intense viscosity/stress features, correlated with their relatively stronger shear thinning response. The constriction resistance provokes a pressure-level adjustment, leading to fully developed Couette-like constant values upstream-downstream.
published_date 2023-06-30T17:10:24Z
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score 11.012678

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