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Computational modelling of fluid-structure interaction at nano-scale boundaries. / Farzaneh Hafezi

Swansea University Author: Farzaneh Hafezi

Abstract

With the emergence of nano-devices and nano-scale research, gaining further understanding of the evolution of drag forces exerted by molecular flows, at low Knudsen numbers (-0.1-0.5), over nano-scaled objects with 20-100 nm size is a realistic expectation. The proposed research examines the fluid-s...

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Published: 2014
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42753
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first_indexed 2018-08-02T18:55:27Z
last_indexed 2018-08-03T10:11:00Z
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spelling 2018-08-02T16:24:30.3517957 v2 42753 2018-08-02 Computational modelling of fluid-structure interaction at nano-scale boundaries. e823da1f68cb92fc541e2abe39fc6a5d NULL Farzaneh Hafezi Farzaneh Hafezi true true 2018-08-02 With the emergence of nano-devices and nano-scale research, gaining further understanding of the evolution of drag forces exerted by molecular flows, at low Knudsen numbers (-0.1-0.5), over nano-scaled objects with 20-100 nm size is a realistic expectation. The proposed research examines the fluid-structure interaction at nano-scales from first principles. It has also critically evaluated, and if necessary modified, the assumptions made during the development of a computational model. The research has provided new insights in modelling molecular interaction with continuum as well as molecular walls and calculation procedures for predicting macroscopic properties such as velocity, pressure and drag coefficients. The proposed formulation has been compared with the state of the art formulations as published in recent journals and verified on number numerical and molecular tests as experimental and analytical results are unavailable at this scale. The effect of various geometry configurations (slit pore, inclined and stepped wall) to model the pressure driven molecular flow through confined walls is studied for number of surface roughness and driving force values given by adjusting molecular accelerations. The molecular flow over diamond, circular and square shaped cylinders confined within parallel walls has also been modelled at various input conditions. It is expected that the proposed research will have impact in developing future nanoscale applications, in the field of drug delivery, surface cleaning and protein movement, where adsorption, drag resistance or, in general, understanding of the knowledge of fluid-structure interaction at 50-100nm scale is important. Some of the future research areas resulting from this research have also been identified. E-Thesis Mechanical engineering.;Fluid mechanics.;Nanotechnology. 31 12 2014 2014-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:30.3517957 2018-08-02T16:24:30.3517957 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Farzaneh Hafezi NULL 1 0042753-02082018162519.pdf 10807522.pdf 2018-08-02T16:25:19.2730000 Output 28027226 application/pdf E-Thesis true 2018-08-02T16:25:19.2730000 false
title Computational modelling of fluid-structure interaction at nano-scale boundaries.
spellingShingle Computational modelling of fluid-structure interaction at nano-scale boundaries.
Farzaneh Hafezi
title_short Computational modelling of fluid-structure interaction at nano-scale boundaries.
title_full Computational modelling of fluid-structure interaction at nano-scale boundaries.
title_fullStr Computational modelling of fluid-structure interaction at nano-scale boundaries.
title_full_unstemmed Computational modelling of fluid-structure interaction at nano-scale boundaries.
title_sort Computational modelling of fluid-structure interaction at nano-scale boundaries.
author_id_str_mv e823da1f68cb92fc541e2abe39fc6a5d
author_id_fullname_str_mv e823da1f68cb92fc541e2abe39fc6a5d_***_Farzaneh Hafezi
author Farzaneh Hafezi
author2 Farzaneh Hafezi
format E-Thesis
publishDate 2014
institution Swansea University
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 1
active_str 0
description With the emergence of nano-devices and nano-scale research, gaining further understanding of the evolution of drag forces exerted by molecular flows, at low Knudsen numbers (-0.1-0.5), over nano-scaled objects with 20-100 nm size is a realistic expectation. The proposed research examines the fluid-structure interaction at nano-scales from first principles. It has also critically evaluated, and if necessary modified, the assumptions made during the development of a computational model. The research has provided new insights in modelling molecular interaction with continuum as well as molecular walls and calculation procedures for predicting macroscopic properties such as velocity, pressure and drag coefficients. The proposed formulation has been compared with the state of the art formulations as published in recent journals and verified on number numerical and molecular tests as experimental and analytical results are unavailable at this scale. The effect of various geometry configurations (slit pore, inclined and stepped wall) to model the pressure driven molecular flow through confined walls is studied for number of surface roughness and driving force values given by adjusting molecular accelerations. The molecular flow over diamond, circular and square shaped cylinders confined within parallel walls has also been modelled at various input conditions. It is expected that the proposed research will have impact in developing future nanoscale applications, in the field of drug delivery, surface cleaning and protein movement, where adsorption, drag resistance or, in general, understanding of the knowledge of fluid-structure interaction at 50-100nm scale is important. Some of the future research areas resulting from this research have also been identified.
published_date 2014-12-31T03:53:35Z
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score 11.036116

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