Heat Transfer

Description

The course aims to provide knowledge and understanding about the mechanisms of heat transfer, including conduction, convection, radiation, and phase change. The course covers the analytical and empirical methods, which are used to solve heat transfer problems, such as determining the amount of heat being transferred and the temperature field. The students will learn how to apply the theory to relevant engineering problems. Knowledge and understanding For a passing grade the student must understand the theory of steady and transient heat conduction understand the theory of laminar and turbulent convection in boundary layers, in pipes and in external flow around bodies understand the basics of thermal radiation between surfaces understand the basic heat exchanger theory understand the basics of condensation and boiling understand under what conditions analytical or empirical methods are applicable be able to describe the role of heat transfer in industry Competences and skills For a passing grade the student must analyse different heat transfer problems and suggest solution methods solve heat transfer problems that involve conduction, convection, radiation, condensation and/or boiling in a systematic way judge the uncertainties in the magnitude of heat fluxes and heat transfer coefficients where applicable present analysis and solution of heat transfer problems in writing Judgement and approach For a passing grade the student must critically review chosen methods and results of calculations of heat transfer problems and point out sources of uncertainty understand the assumptions behind different theories and the limitations they imply orally and in written form present analysis of basic issues concerning heat transfer The course covers heat conduction, convection, thermal radiation, condensation, boiling and heat exchangers. For heat conduction the general theory, extended surfaces and transient heating and cooling processes are included. For the convective heat transfer the basic equations, similarity laws, forced and free convection and the basics of turbulence are included. Laminar as well as turbulent cases are studied in internal (ducts) and external (tubes, immersed bodies) flows. Thermal radiation covers general theory, black and grey bodies, view factors, radiative exchange between surfaces as well as radiation with non-transparent gases. For condensation the basic theory on film condensation and influence of essential parameters and the geometry is included. Introduction to dropwise condensation is provided. For boiling, the different boiling regimes are covered by means of the Nukiyama curve. The critical heat flux and the boiling crisis are covered. Heat exchangers of various types for engineering applications are described and the basic theory and methods for sizing and rating of heat transfer equipment are included. LTH programme course for Engineering Physics. Choice group: elective. Language: The course will be given in English. Suitable for foreign students: True. Assumed prior knowledge flag: 0. Entry requirements flag: 1.