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Finite element modelling and experimental validation in radiative heat transfer. / Mile R Vujicic

Swansea University Author: Mile R Vujicic

Abstract

The work presented in this thesis can be divided into two parts: numerical modelling and experimental validation. The first part considers a finite element computer code called Pharo which has been developed to simulates heat transfer exchanged in an enclosure via thermal radiation and conduction. T...

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Published: 2006
Institution: Swansea University
Degree level: Doctoral
Degree name: Ph.D
URI: https://cronfa.swan.ac.uk/Record/cronfa42640
first_indexed 2018-08-02T18:55:11Z
last_indexed 2018-08-03T10:10:41Z
id cronfa42640
recordtype RisThesis
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spelling 2018-08-02T16:24:29.9461990 v2 42640 2018-08-02 Finite element modelling and experimental validation in radiative heat transfer. 3440e5fe0088bb630531a121a29d0776 NULL Mile R Vujicic Mile R Vujicic true true 2018-08-02 The work presented in this thesis can be divided into two parts: numerical modelling and experimental validation. The first part considers a finite element computer code called Pharo which has been developed to simulates heat transfer exchanged in an enclosure via thermal radiation and conduction. This finite element heat transfer code has been written for the Defence, Science and Technology Laboratory (DSTL). Face to face (zonal) thermal radiation which operates with diffuse surface properties of materials without a participating media is analyzed and included in Pharo. To analyze the net heat exchanged within an enclosure several methods for view factor calculation, such as the Monte Carlo and Hemi-cube methods were included in Pharo. During heat transfer simulations a better accuracy of results has been demonstrated using a new approach called the Multiple Reflection of View Factors 'MRV' method. Transient heat flow is solved using both finite difference and finite element time stepping. Also, an analysis of transient heat flow using different solvers (direct and iterative) to find the most appropriate one was carried out. The second part of the work considers experimental validation of numerical results obtained using Pharo. Special attention was given to the analysis of the relationship between view factors and measured heat transfer. To make the experimental data complete the measurements of surface properties including emissivity, reflectivity for different wavelengths as well as roughness of materials is presented. These experimental results can be used as experimental benchmark data for model users and developers. E-Thesis Computer science.;Thermodynamics. 31 12 2006 2006-12-31 COLLEGE NANME Engineering COLLEGE CODE Swansea University Doctoral Ph.D 2018-08-02T16:24:29.9461990 2018-08-02T16:24:29.9461990 Faculty of Science and Engineering School of Engineering and Applied Sciences - Uncategorised Mile R Vujicic NULL 1 0042640-02082018162510.pdf 10805416.pdf 2018-08-02T16:25:10.3830000 Output 31459322 application/pdf E-Thesis true 2018-08-02T16:25:10.3830000 false
title Finite element modelling and experimental validation in radiative heat transfer.
spellingShingle Finite element modelling and experimental validation in radiative heat transfer.
Mile R Vujicic
title_short Finite element modelling and experimental validation in radiative heat transfer.
title_full Finite element modelling and experimental validation in radiative heat transfer.
title_fullStr Finite element modelling and experimental validation in radiative heat transfer.
title_full_unstemmed Finite element modelling and experimental validation in radiative heat transfer.
title_sort Finite element modelling and experimental validation in radiative heat transfer.
author_id_str_mv 3440e5fe0088bb630531a121a29d0776
author_id_fullname_str_mv 3440e5fe0088bb630531a121a29d0776_***_Mile R Vujicic
author Mile R Vujicic
author2 Mile R Vujicic
format E-Thesis
publishDate 2006
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 The work presented in this thesis can be divided into two parts: numerical modelling and experimental validation. The first part considers a finite element computer code called Pharo which has been developed to simulates heat transfer exchanged in an enclosure via thermal radiation and conduction. This finite element heat transfer code has been written for the Defence, Science and Technology Laboratory (DSTL). Face to face (zonal) thermal radiation which operates with diffuse surface properties of materials without a participating media is analyzed and included in Pharo. To analyze the net heat exchanged within an enclosure several methods for view factor calculation, such as the Monte Carlo and Hemi-cube methods were included in Pharo. During heat transfer simulations a better accuracy of results has been demonstrated using a new approach called the Multiple Reflection of View Factors 'MRV' method. Transient heat flow is solved using both finite difference and finite element time stepping. Also, an analysis of transient heat flow using different solvers (direct and iterative) to find the most appropriate one was carried out. The second part of the work considers experimental validation of numerical results obtained using Pharo. Special attention was given to the analysis of the relationship between view factors and measured heat transfer. To make the experimental data complete the measurements of surface properties including emissivity, reflectivity for different wavelengths as well as roughness of materials is presented. These experimental results can be used as experimental benchmark data for model users and developers.
published_date 2006-12-31T08:39:12Z
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score 11.060726

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