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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Main Author:	Tan, Kah Yaw
Format:	Thesis
Language:	English English
Published:	1999
Subjects:	Heat - Transmission - Thermal boundary layer - Case studies
Online Access:	http://psasir.upm.edu.my/id/eprint/10247/1/FK_1999_8_A.pdf
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id	my-upm-ir.10247
record_format	uketd_dc
spelling	my-upm-ir.102472011-03-16T04:55:20Z The Simulation of Transient Heat Transfer in a Thermal Boundary Layer 1999-06 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. Heat - Transmission - Thermal boundary layer - Case studies 1999-06 Thesis http://psasir.upm.edu.my/id/eprint/10247/ http://psasir.upm.edu.my/id/eprint/10247/1/FK_1999_8_A.pdf application/pdf en public masters Universiti Putra Malaysia Heat - Transmission - Thermal boundary layer - Case studies Faculty of Engineering English
institution	Universiti Putra Malaysia
collection	PSAS Institutional Repository
language	English English
topic	Heat - Transmission - Thermal boundary layer - Case studies
spellingShingle	Heat - Transmission - Thermal boundary layer - Case studies Tan, Kah Yaw The Simulation of Transient Heat Transfer in a Thermal Boundary Layer
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.
format	Thesis
qualification_level	Master's degree
author	Tan, Kah Yaw
author_facet	Tan, Kah Yaw
author_sort	Tan, Kah Yaw
title	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_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_sort	simulation of transient heat transfer in a thermal boundary layer
granting_institution	Universiti Putra Malaysia
granting_department	Faculty of Engineering
publishDate	1999
url	http://psasir.upm.edu.my/id/eprint/10247/1/FK_1999_8_A.pdf
_version_	1747811079103184896

The Simulation of Transient Heat Transfer in a Thermal Boundary Layer

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