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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| Format: | Thesis |
| Language: | English English |
| Published: |
2009
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| Online Access: | http://psasir.upm.edu.my/id/eprint/7239/ http://psasir.upm.edu.my/id/eprint/7239/1/IPM_2009_4.pdf |
| _version_ | 1848840540365258752 |
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| author | Ahmad, Syakila |
| author_facet | Ahmad, Syakila |
| author_sort | Ahmad, Syakila |
| building | UPM Institutional Repository |
| collection | Online Access |
| 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. |
| first_indexed | 2025-11-15T07:28:58Z |
| format | Thesis |
| id | upm-7239 |
| institution | Universiti Putra Malaysia |
| institution_category | Local University |
| language | English English |
| last_indexed | 2025-11-15T07:28:58Z |
| publishDate | 2009 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | upm-72392023-11-21T08:31:26Z http://psasir.upm.edu.my/id/eprint/7239/ Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids 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. 2009-05 Thesis NonPeerReviewed text en http://psasir.upm.edu.my/id/eprint/7239/1/IPM_2009_4.pdf Ahmad, Syakila (2009) Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids. PhD thesis, Universiti Putra Malaysia. Viscous flow English |
| spellingShingle | Viscous flow Ahmad, Syakila Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids |
| title | 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_short | Convection Boundary Layer Flows Over Needles and Cylinders in Viscous Fluids |
| title_sort | convection boundary layer flows over needles and cylinders in viscous fluids |
| topic | Viscous flow |
| url | http://psasir.upm.edu.my/id/eprint/7239/ http://psasir.upm.edu.my/id/eprint/7239/1/IPM_2009_4.pdf |