- Title
- Modelling heat diffusivity
- Creator
- Alenzi, Fawzah
- Relation
- University of Newcastle Research Higher Degree Thesis
- Resource Type
- thesis
- Date
- 2023
- Description
- Research Doctorate - Doctor of Philosophy (PhD)
- Description
- Many nations are confronted with the issue of coal combustion during extraction and transportation, which is not desired. Self-heating is the main source of this problem. Therefore, it is essential to analyze this phenomenon in order to understand and control it. Notably, the study of heat-transfer behaviour is essential to comprehend self-heating. Thermal diffusivity, thermal conductivity, and heat capacity are essential thermal properties that influence the heat transfer process. In particular, knowing the thermal diffusivity is essential to calculate the speed of heat propagation in an object. Additionally, knowing thermal diffusivity is the most important requirement for modelling many other temperature-related issues. Heat-transfer equations are essential for modelling heat measurements, and their structure is determined by the geometry of the sample and the time period of heat transfer. The variables of these equations can be determined on the basis of the shape of the sample. In mathematical analysis, two essential parameters appear, the thermal diffusivity and the Biot number. To obtain precise measurements, it is necessary to calculate the Biot number as well as the thermal diffusivity values. Although the Biot number itself is not so fundamental, it must be determined accurately to find the diffusivity. The aim of this thesis is to create a mathematical model for heat transfer in both cylindrical and cubic samples, as well as to investigate the techniques used to calculate the Biot number and thermal diffusivity. We develop a numerical solution for the heat transfer model to determine the Biot number and the thermal diffusivity from the measurements. Our research findings demonstrate that the matching method we developed is an effective approach for analyzing heat measurement when compared to other methods. Furthermore, we examine the differences in the heat transfer model for cylinder and cube samples.
- Subject
- heat transfer; modelling; thermal diffusivity; biot number
- Identifier
- http://hdl.handle.net/1959.13/1504604
- Identifier
- uon:55556
- Rights
- This thesis is currently under embargo and will be available from 27.10.2024, Copyright 2023 Fawzah Alenzi
- Language
- eng
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