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A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows

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

Journal of Non-Newtonian Fluid Mechanics, Volume: 204, Pages: 7 - 21

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

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DOI (Published version): 10.1016/j.jnnfm.2013.11.001

Abstract

This hybrid finite element/volume study is concerned with the modelling of worm-like micellar systems, employing a new micellar thixotropic constitutive model with viscoelasticity within network-structure construction-destruction kinetics. The work focuses on steady-state solutions for axisymmetric,...

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Published in: Journal of Non-Newtonian Fluid Mechanics
Published: 2014
URI: https://cronfa.swan.ac.uk/Record/cronfa24192
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spelling 2017-03-01T17:04:15.7414265 v2 24192 2015-11-08 A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows b6a811513b34d56e66489512fc2c6c61 0000-0002-7722-821X Michael Webster Michael Webster true false b3a1417ca93758b719acf764c7ced1c5 Hamid Tamaddon-Jahromi Hamid Tamaddon-Jahromi true false 2015-11-08 EEN This hybrid finite element/volume study is concerned with the modelling of worm-like micellar systems, employing a new micellar thixotropic constitutive model with viscoelasticity within network-structure construction-destruction kinetics. The work focuses on steady-state solutions for axisymmetric, rounded-corner, 4:1:4 contraction-expansion flows. This has importance in industrial and healthcare applications such as in enhanced oil-reservoir recovery. Material functions for the micellar models (time-dependent, thixotropic) have been fitted to match two different extensional configurations of the exponential Phan-Thien/Tanner (PTT) model (rubber network-based, non-thixotropic). This covers mild and strong-hardening response, and re solvent fraction, highly-polymeric (=1/9) and solvent-dominated (=0.9) fluids. Solution results are described through normalised Excess Pressure Drop (EPD), vortex intensity and stream function, stress (N1 & N2), and f-functional data. EPD predictions with the new micellar models prove to be consistent (at low rates, some rising) with Newtonian results, contrary to the base-reference modified Bautista-Manero (MBM) results. Markedly different vortex intensity trends are found in comparing micellar and EPTT solutions, which correspond with N2-N1 and f data. In order to address the highly-elastic regime for thixotropic materials, a convoluted approach between EPPT and micellar models has been proposed. Here, numerically stable solutions are reported for impressively large We up to 300 and new vortex structures are revealed. Journal Article Journal of Non-Newtonian Fluid Mechanics 204 7 21 Rising excess pressure drop, wormlike micelles, complex flows, viscoelasticity, high-elasticity solutions, Bautista-Manero models, numerical simulation, hybrid finite element/volume method, enhanced oil-recovery 28 2 2014 2014-02-28 10.1016/j.jnnfm.2013.11.001 COLLEGE NANME Engineering COLLEGE CODE EEN Swansea University 2017-03-01T17:04:15.7414265 2015-11-08T19:41:15.1646460 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised J.E. López-Aguilar 1 M.F. Webster 2 H.R. Tamaddon-Jahromi 3 O. Manero 4 Michael Webster 0000-0002-7722-821X 5 Hamid Tamaddon-Jahromi 6
title A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
spellingShingle A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
Michael Webster
Hamid Tamaddon-Jahromi
title_short A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
title_full A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
title_fullStr A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
title_full_unstemmed A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
title_sort A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
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
M.F. Webster
H.R. Tamaddon-Jahromi
O. Manero
Michael Webster
Hamid Tamaddon-Jahromi
format Journal article
container_title Journal of Non-Newtonian Fluid Mechanics
container_volume 204
container_start_page 7
publishDate 2014
institution Swansea University
doi_str_mv 10.1016/j.jnnfm.2013.11.001
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 This hybrid finite element/volume study is concerned with the modelling of worm-like micellar systems, employing a new micellar thixotropic constitutive model with viscoelasticity within network-structure construction-destruction kinetics. The work focuses on steady-state solutions for axisymmetric, rounded-corner, 4:1:4 contraction-expansion flows. This has importance in industrial and healthcare applications such as in enhanced oil-reservoir recovery. Material functions for the micellar models (time-dependent, thixotropic) have been fitted to match two different extensional configurations of the exponential Phan-Thien/Tanner (PTT) model (rubber network-based, non-thixotropic). This covers mild and strong-hardening response, and re solvent fraction, highly-polymeric (=1/9) and solvent-dominated (=0.9) fluids. Solution results are described through normalised Excess Pressure Drop (EPD), vortex intensity and stream function, stress (N1 & N2), and f-functional data. EPD predictions with the new micellar models prove to be consistent (at low rates, some rising) with Newtonian results, contrary to the base-reference modified Bautista-Manero (MBM) results. Markedly different vortex intensity trends are found in comparing micellar and EPTT solutions, which correspond with N2-N1 and f data. In order to address the highly-elastic regime for thixotropic materials, a convoluted approach between EPPT and micellar models has been proposed. Here, numerically stable solutions are reported for impressively large We up to 300 and new vortex structures are revealed.
published_date 2014-02-28T03:28:39Z
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score 11.012678

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