The Simulation of Transient Heat Transfer in a Thermal Boundary Layer
The onset of convection in a horizontal layer is widely recognised as the simplest example of hydrodynamic instability where nonlinear temperature profile prevails. A newly defined transient Rayleigh number that incorporates the mode of heat transport and the critical time can be used to predict...
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| Format: | Thesis |
| Language: | English English |
| Published: |
1999
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| Online Access: | http://psasir.upm.edu.my/id/eprint/10247/1/FK_1999_8_A.pdf |
| _version_ | 1796967899453194240 |
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| author | Tan, Kah Yaw |
| author_facet | Tan, Kah Yaw |
| author_sort | Tan, Kah Yaw |
| collection | UPM |
| description | The onset of convection in a horizontal layer is widely recognised as the
simplest example of hydrodynamic instability where nonlinear temperature profile
prevails. A newly defined transient Rayleigh number that incorporates the mode of
heat transport and the critical time can be used to predict the onset of convection.
The mode of heat transport is characterized by a thermal boundary condition that
determines the Biot number and its corresponding critical Rayleigh number. The
study of onset of convection can be verified by using Computational Fluid Dynamic
(CFD) to solve the governing partial differential equations for heat conduction,
momentum, energy and chemical species. The simulation of heat transfer in the
thermal layer was carried out by the commercial software, FLUENT. The occurrence
of the convection was observed for two boundary conditions: constant heat flux and
fixed surface temperature. Most of the observed values were in good agreement with
the theoretical values. The critical time and critical depth for transient heat transfer can be determined accurately. However, the accuracy of modeling of transient heat
transfer can be further improved. |
| first_indexed | 2024-03-06T07:20:37Z |
| format | Thesis |
| id | upm.eprints-10247 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:20:37Z |
| publishDate | 1999 |
| record_format | dspace |
| spelling | upm.eprints-102472011-03-16T04:55:20Z http://psasir.upm.edu.my/id/eprint/10247/ The Simulation of Transient Heat Transfer in a Thermal Boundary Layer Tan, Kah Yaw The onset of convection in a horizontal layer is widely recognised as the simplest example of hydrodynamic instability where nonlinear temperature profile prevails. A newly defined transient Rayleigh number that incorporates the mode of heat transport and the critical time can be used to predict the onset of convection. The mode of heat transport is characterized by a thermal boundary condition that determines the Biot number and its corresponding critical Rayleigh number. The study of onset of convection can be verified by using Computational Fluid Dynamic (CFD) to solve the governing partial differential equations for heat conduction, momentum, energy and chemical species. The simulation of heat transfer in the thermal layer was carried out by the commercial software, FLUENT. The occurrence of the convection was observed for two boundary conditions: constant heat flux and fixed surface temperature. Most of the observed values were in good agreement with the theoretical values. The critical time and critical depth for transient heat transfer can be determined accurately. However, the accuracy of modeling of transient heat transfer can be further improved. 1999-06 Thesis NonPeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/10247/1/FK_1999_8_A.pdf Tan, Kah Yaw (1999) The Simulation of Transient Heat Transfer in a Thermal Boundary Layer. Masters thesis, Universiti Putra Malaysia. Heat - Transmission - Thermal boundary layer - Case studies English |
| spellingShingle | Heat - Transmission - Thermal boundary layer - Case studies Tan, Kah Yaw The Simulation of Transient Heat Transfer in a Thermal Boundary Layer |
| title | The Simulation of Transient Heat Transfer in a Thermal Boundary Layer |
| title_full | The Simulation of Transient Heat Transfer in a Thermal Boundary Layer |
| title_fullStr | The Simulation of Transient Heat Transfer in a Thermal Boundary Layer |
| title_full_unstemmed | The Simulation of Transient Heat Transfer in a Thermal Boundary Layer |
| title_short | The Simulation of Transient Heat Transfer in a Thermal Boundary Layer |
| title_sort | simulation of transient heat transfer in a thermal boundary layer |
| topic | Heat - Transmission - Thermal boundary layer - Case studies |
| url | http://psasir.upm.edu.my/id/eprint/10247/1/FK_1999_8_A.pdf |
| work_keys_str_mv | AT tankahyaw thesimulationoftransientheattransferinathermalboundarylayer AT tankahyaw simulationoftransientheattransferinathermalboundarylayer |