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MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES / ADENIYI OGUNKEYE

Swansea University Author: ADENIYI OGUNKEYE

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DOI (Published version): 10.23889/SUthesis.64440

Abstract

This thesis reports a series of theoretical, experimental and computational investigations concerning advanced rheometry and the dynamics of worm like micellular systems (WLMs) in superposition rheometry. A robust experimental data set is first obtained under both parallel and orthogonal superpositi...

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Published: Swansea, Wales, UK 2023
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
Supervisor: Curtis, D. J.
URI: https://cronfa.swan.ac.uk/Record/cronfa64440
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first_indexed 2023-09-05T15:56:54Z
last_indexed 2023-09-05T15:56:54Z
id cronfa64440
recordtype RisThesis
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spelling v2 64440 2023-09-05 MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES 5dbf3df8f879721660bb42c6edf3bf13 ADENIYI OGUNKEYE ADENIYI OGUNKEYE true false 2023-09-05 This thesis reports a series of theoretical, experimental and computational investigations concerning advanced rheometry and the dynamics of worm like micellular systems (WLMs) in superposition rheometry. A robust experimental data set is first obtained under both parallel and orthogonal superposition rheometry conditions before the ability of the Corotational Maxwell, Giesekus and, for the first time, Gordon-Schowolter constitutive models to capture the behaviour of WLMs under superposition flows is evaluated. The initiation of stress controlled oscillatory rheometry is then investigated both theoretically and experimentally (using the same WLM system) to determine the impact of instrument inertia on the establishment of steady state oscillatory flows. This study reveals that the time scale for the establishment of steady state oscillations can be dramatically impacted by the presence of instrument inertia. Finally, a Brownian Dynamics approach is used in an attempt to identify the polymer dynamics responsible for the appearance of negative values of the ‘parallel storage modulus’ under certain conditions, as is often noted in the literature. E-Thesis Swansea, Wales, UK Chemical Engineering, rheology, complex fluids 16 8 2023 2023-08-16 10.23889/SUthesis.64440 A selection of third party content is redacted or is partially redacted from this thesis due to copyright restrictions. COLLEGE NANME COLLEGE CODE Swansea University Curtis, D. J. Doctoral Ph.D 2023-10-20T16:43:55.5139658 2023-09-05T16:50:47.0866600 Faculty of Science and Engineering School of Engineering and Applied Sciences - Chemical Engineering ADENIYI OGUNKEYE 1 64440__28461__0d31ccf44ae84718b4896a3397530fef.pdf 2023_Ogunkeye_A.final.64440.pdf 2023-09-05T16:55:07.6208210 Output 10241134 application/pdf E-Thesis – open access true Copyright: The Author, Adeniyi Ogunkeye, 2023. true eng
title MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
spellingShingle MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
ADENIYI OGUNKEYE
title_short MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
title_full MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
title_fullStr MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
title_full_unstemmed MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
title_sort MODELLING, CHARACTERISATION AND INTERPRETATION OF RHEOLOGICAL EXPERIMENTS PERFROMED ON AQUEOUS SOLUTIONS OF WORM LIKE MICELLES
author_id_str_mv 5dbf3df8f879721660bb42c6edf3bf13
author_id_fullname_str_mv 5dbf3df8f879721660bb42c6edf3bf13_***_ADENIYI OGUNKEYE
author ADENIYI OGUNKEYE
author2 ADENIYI OGUNKEYE
format E-Thesis
publishDate 2023
institution Swansea University
doi_str_mv 10.23889/SUthesis.64440
college_str Faculty of Science and Engineering
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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 - Chemical Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Engineering and Applied Sciences - Chemical Engineering
document_store_str 1
active_str 0
description This thesis reports a series of theoretical, experimental and computational investigations concerning advanced rheometry and the dynamics of worm like micellular systems (WLMs) in superposition rheometry. A robust experimental data set is first obtained under both parallel and orthogonal superposition rheometry conditions before the ability of the Corotational Maxwell, Giesekus and, for the first time, Gordon-Schowolter constitutive models to capture the behaviour of WLMs under superposition flows is evaluated. The initiation of stress controlled oscillatory rheometry is then investigated both theoretically and experimentally (using the same WLM system) to determine the impact of instrument inertia on the establishment of steady state oscillatory flows. This study reveals that the time scale for the establishment of steady state oscillations can be dramatically impacted by the presence of instrument inertia. Finally, a Brownian Dynamics approach is used in an attempt to identify the polymer dynamics responsible for the appearance of negative values of the ‘parallel storage modulus’ under certain conditions, as is often noted in the literature.
published_date 2023-08-16T16:43:57Z
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score 11.016503

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