Journal article 695 views
A new constitutive model for worm-like micellar systems – Numerical simulation of confined contraction–expansion flows
Journal of Non-Newtonian Fluid Mechanics, Volume: 204, Pages: 7 - 21
Swansea University Authors:
Michael Webster , Hamid Tamaddon Jahromi
Full text not available from this repository: check for access using links below.
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,...
Published in: | Journal of Non-Newtonian Fluid Mechanics |
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Published: |
2014
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URI: | https://cronfa.swan.ac.uk/Record/cronfa24192 |
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2015-11-09T11:28:12Z |
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2018-02-09T05:03:42Z |
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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 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 COLLEGE CODE 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 |
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Journal article |
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Journal of Non-Newtonian Fluid Mechanics |
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204 |
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7 |
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2014 |
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Swansea University |
doi_str_mv |
10.1016/j.jnnfm.2013.11.001 |
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Faculty of Science and Engineering |
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Faculty of Science and Engineering |
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facultyofscienceandengineering |
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Faculty of Science and Engineering |
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School of Engineering and Applied Sciences - Uncategorised{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Uncategorised |
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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 |
2014-02-28T04:16:17Z |
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1824457834347102208 |
score |
11.052339 |