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A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques. / Raymond Hickey

Swansea University Author: Raymond Hickey

Abstract

The scope of this dissertation centers on the application of the Characteristic Based SpHt (CBS) algorithm to the governing equations of compressible flow, represented by the conservation form of the Navier Stokes equations. It is proposed that the inherent stability of split algorithm alongside the...

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Published: 2008
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42499
first_indexed 2018-08-02T18:54:51Z
last_indexed 2018-08-03T10:10:19Z
id cronfa42499
recordtype RisThesis
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spelling 2018-08-02T16:24:29.4625964 v2 42499 2018-08-02 A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques. de8311b53f46e55dde87545a66c6a357 NULL Raymond Hickey Raymond Hickey true true 2018-08-02 The scope of this dissertation centers on the application of the Characteristic Based SpHt (CBS) algorithm to the governing equations of compressible flow, represented by the conservation form of the Navier Stokes equations. It is proposed that the inherent stability of split algorithm alongside the explicit nature of the CBS scheme utilised in this dissertation will produce accurate results. To study the robustness and accuracy of the CBS scheme, various unstructured and hybrid meshes have been used. The method has been extended to three dimensions and the code parallelised to accelerate the solution. In addition to laminar compressible flows, at various Mach numbers, the code has been extended to incorporate RANS based turbulence modeling. The performance of the CBS scheme is established by studying a variety of flow problems. The problems considered include test cases of an inviscid, viscous and turbulent nature for flows past both two dimensional and three dimensional solid geometries. Computed results are compared to those published in literature. In addition the use and benefits of artificial diffusion, shock capturing and structured viscous layers are discussed at relevant points of this dissertation. E-Thesis Computer science. 31 12 2008 2008-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:29.4625964 2018-08-02T16:24:29.4625964 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Raymond Hickey NULL 1 0042499-02082018162459.pdf 10801729.pdf 2018-08-02T16:24:59.3200000 Output 11166884 application/pdf E-Thesis true 2018-08-02T16:24:59.3200000 false
title A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
spellingShingle A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
Raymond Hickey
title_short A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
title_full A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
title_fullStr A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
title_full_unstemmed A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
title_sort A study of the characteristic based split scheme (CBS), considering the incorporation of 'speed up' techniques.
author_id_str_mv de8311b53f46e55dde87545a66c6a357
author_id_fullname_str_mv de8311b53f46e55dde87545a66c6a357_***_Raymond Hickey
author Raymond Hickey
author2 Raymond Hickey
format E-Thesis
publishDate 2008
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
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description The scope of this dissertation centers on the application of the Characteristic Based SpHt (CBS) algorithm to the governing equations of compressible flow, represented by the conservation form of the Navier Stokes equations. It is proposed that the inherent stability of split algorithm alongside the explicit nature of the CBS scheme utilised in this dissertation will produce accurate results. To study the robustness and accuracy of the CBS scheme, various unstructured and hybrid meshes have been used. The method has been extended to three dimensions and the code parallelised to accelerate the solution. In addition to laminar compressible flows, at various Mach numbers, the code has been extended to incorporate RANS based turbulence modeling. The performance of the CBS scheme is established by studying a variety of flow problems. The problems considered include test cases of an inviscid, viscous and turbulent nature for flows past both two dimensional and three dimensional solid geometries. Computed results are compared to those published in literature. In addition the use and benefits of artificial diffusion, shock capturing and structured viscous layers are discussed at relevant points of this dissertation.
published_date 2008-12-31T04:32:09Z
_version_ 1862505783165452288
score 11.42897

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