Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids

Convection is the heat transfer process which is frequently encountered in environmental and engineering applications. In this study, the problems of steady laminar convection boundary layer flows over needles and cylinders immersed in an incompressible and viscous fluid are theoretically conside...

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Main Author:	Ahmad, Syakila
Format:	Thesis
Language:	English English
Published:	2009
Subjects:	Viscous flow
Online Access:	http://psasir.upm.edu.my/id/eprint/7239/1/IPM_2009_4.pdf
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id	my-upm-ir.7239
record_format	uketd_dc
spelling	my-upm-ir.72392023-11-21T08:31:26Z Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids 2009-05 Ahmad, Syakila Convection is the heat transfer process which is frequently encountered in environmental and engineering applications. In this study, the problems of steady laminar convection boundary layer flows over needles and cylinders immersed in an incompressible and viscous fluid are theoretically considered. The dimensional partial differential equations governing the boundary layer flows are first transformed into nondimensional equations. These equations are then transformed using non-similar transformation. Then, these transformed nonlinear systems of equations are solved using an implicit finite difference scheme known as the Keller-box method, which has been found to be very suitable in dealing with nonlinear and parabolic equations. The complete numerical method used in this study is programmed in Fortran. Numerical computations are carried out for various values of the dimensionless parameters of the problems, which include the Prandtl number Pr, the ratio of the major and minor axes of the cylinder bc=ac, the mixed convection parameter , the modified mixed convection parameter ^, the transverse curvature parameter , the parameter a representing the needle size and the viscosity/temperature parameter r. Numerical results presented in this study are the skin friction coefficient, the heat transfer coefficient, the local Nusselt number, the cylinder temperature as well as the velocity and temperature profiles. The obtained results show that the flow and the thermal characteristics are significantly influenced by these parameters. Viscous flow 2009-05 Thesis http://psasir.upm.edu.my/id/eprint/7239/ http://psasir.upm.edu.my/id/eprint/7239/1/IPM_2009_4.pdf text en public phd doctoral Universiti Putra Malaysia Viscous flow Institute for Mathematical Research (INSPEM) English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Viscous flow
spellingShingle	Viscous flow Ahmad, Syakila Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids
description	Convection is the heat transfer process which is frequently encountered in environmental and engineering applications. In this study, the problems of steady laminar convection boundary layer flows over needles and cylinders immersed in an incompressible and viscous fluid are theoretically considered. The dimensional partial differential equations governing the boundary layer flows are first transformed into nondimensional equations. These equations are then transformed using non-similar transformation. Then, these transformed nonlinear systems of equations are solved using an implicit finite difference scheme known as the Keller-box method, which has been found to be very suitable in dealing with nonlinear and parabolic equations. The complete numerical method used in this study is programmed in Fortran. Numerical computations are carried out for various values of the dimensionless parameters of the problems, which include the Prandtl number Pr, the ratio of the major and minor axes of the cylinder bc=ac, the mixed convection parameter , the modified mixed convection parameter ^, the transverse curvature parameter , the parameter a representing the needle size and the viscosity/temperature parameter r. Numerical results presented in this study are the skin friction coefficient, the heat transfer coefficient, the local Nusselt number, the cylinder temperature as well as the velocity and temperature profiles. The obtained results show that the flow and the thermal characteristics are significantly influenced by these parameters.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Ahmad, Syakila
author_facet	Ahmad, Syakila
author_sort	Ahmad, Syakila
title	Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids
title_short	Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids
title_full	Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids
title_fullStr	Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids
title_full_unstemmed	Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids
title_sort	convection boundary layer flows over needles and cylinders in viscous fluids
granting_institution	Universiti Putra Malaysia
granting_department	Institute for Mathematical Research (INSPEM)
publishDate	2009
url	http://psasir.upm.edu.my/id/eprint/7239/1/IPM_2009_4.pdf
_version_	1794018696895660032

Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids

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