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Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation

The unsteady free convective flow about a horizontal circular cylinder in the presence of heat generation and radiation is considered in this thesis. The cylinder is fixed and immersed in a Newtonian fluid, while the temperature at the surface is either heated uniformly or oscillated harmonically ab...

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Main Author: Zainuddin, Najahulfazliah
Format: Thesis
Language:English
English
English
Published: 2014
Subjects:
QC Physics
QC251-338.5 Heat
Online Access:http://eprints.uthm.edu.my/1594/1/24p%20NAJAHULFAZLIAH%20ZAINUDDIN.pdf
http://eprints.uthm.edu.my/1594/2/NAJAHULFAZLIAH%20ZAINUDDIN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/1594/3/NAJAHULFAZLIAH%20ZAINUDDIN%20WATERMARK.pdf
http://eprints.uthm.edu.my/1594/
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spelling my.uthm.eprints.15942021-10-03T08:07:20Z http://eprints.uthm.edu.my/1594/ Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation Zainuddin, Najahulfazliah QC Physics QC251-338.5 Heat The unsteady free convective flow about a horizontal circular cylinder in the presence of heat generation and radiation is considered in this thesis. The cylinder is fixed and immersed in a Newtonian fluid, while the temperature at the surface is either heated uniformly or oscillated harmonically about the mean temperature, temperature of the surrounding. In this study, the governing equations are first transformed into a non-dimensional form by using appropriate non-dimensional variables. These equations are then transformed into a system of nonlinear partial differential equations, then were solved numerically by using two types of finite difference methods namely explicit finite difference method and implicit finite difference scheme of Crank Nicolson method. The solutions obtained by those two methods are used to compare the accuracy between them with the previous studies. The presence of heat generation significantly gives effect which increased the local skin-friction coefficient, temperature and velocity distribution but the local rate of heat transfer decreases. While, the presence of radiation increase the local rate of heat transfer, skin-friction coefficient, the temperature and velocity distributions. On the other hand, as the Prandtl number increases, the temperature and velocity distributions are decreases. This study also presents the temperature patterns for the problems when the temperature of the surface is heated and oscillated with respect to time. The comparison between the presence of radiation, heat generation and both of radiation and heat generation on temperature profiles against time are presented. It would be interesting when this study extended by involving the effect of magnetic field on this study and solve the related problems by using other numerical method. 2014-07 Thesis NonPeerReviewed text en http://eprints.uthm.edu.my/1594/1/24p%20NAJAHULFAZLIAH%20ZAINUDDIN.pdf text en http://eprints.uthm.edu.my/1594/2/NAJAHULFAZLIAH%20ZAINUDDIN%20COPYRIGHT%20DECLARATION.pdf text en http://eprints.uthm.edu.my/1594/3/NAJAHULFAZLIAH%20ZAINUDDIN%20WATERMARK.pdf Zainuddin, Najahulfazliah (2014) Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation. Masters thesis, Universiti Tun Hussein Malaysia.
institution Universiti Tun Hussein Onn Malaysia
building UTHM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Tun Hussein Onn Malaysia
content_source UTHM Institutional Repository
url_provider http://eprints.uthm.edu.my/
language English
English
English
topic QC Physics
QC251-338.5 Heat
spellingShingle QC Physics
QC251-338.5 Heat
Zainuddin, Najahulfazliah
Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
description The unsteady free convective flow about a horizontal circular cylinder in the presence of heat generation and radiation is considered in this thesis. The cylinder is fixed and immersed in a Newtonian fluid, while the temperature at the surface is either heated uniformly or oscillated harmonically about the mean temperature, temperature of the surrounding. In this study, the governing equations are first transformed into a non-dimensional form by using appropriate non-dimensional variables. These equations are then transformed into a system of nonlinear partial differential equations, then were solved numerically by using two types of finite difference methods namely explicit finite difference method and implicit finite difference scheme of Crank Nicolson method. The solutions obtained by those two methods are used to compare the accuracy between them with the previous studies. The presence of heat generation significantly gives effect which increased the local skin-friction coefficient, temperature and velocity distribution but the local rate of heat transfer decreases. While, the presence of radiation increase the local rate of heat transfer, skin-friction coefficient, the temperature and velocity distributions. On the other hand, as the Prandtl number increases, the temperature and velocity distributions are decreases. This study also presents the temperature patterns for the problems when the temperature of the surface is heated and oscillated with respect to time. The comparison between the presence of radiation, heat generation and both of radiation and heat generation on temperature profiles against time are presented. It would be interesting when this study extended by involving the effect of magnetic field on this study and solve the related problems by using other numerical method.
format Thesis
author Zainuddin, Najahulfazliah
author_facet Zainuddin, Najahulfazliah
author_sort Zainuddin, Najahulfazliah
title Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
title_short Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
title_full Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
title_fullStr Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
title_full_unstemmed Unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
title_sort unsteady free convection on a horizontal circular cylinder in the presence of heat generation and radiation
publishDate 2014
url http://eprints.uthm.edu.my/1594/1/24p%20NAJAHULFAZLIAH%20ZAINUDDIN.pdf
http://eprints.uthm.edu.my/1594/2/NAJAHULFAZLIAH%20ZAINUDDIN%20COPYRIGHT%20DECLARATION.pdf
http://eprints.uthm.edu.my/1594/3/NAJAHULFAZLIAH%20ZAINUDDIN%20WATERMARK.pdf
http://eprints.uthm.edu.my/1594/
_version_ 1738580879983247360
score 13.211869

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