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Lecture
Are you an EPFL student looking for a semester project?
Work with us on data science and visualisation projects, and deploy your project as an app on top of Graph Search.
This lecture covers the laws of Kirchoff, defining the conditions for establishing relationships for emissivity and absorptivity. It explains the spectral hemispherical emissivity and total hemispherical emissivity, emphasizing the impact of real surfaces on radiative heat transfer. The lecture also discusses the net radiation exchange at surfaces, providing an electrical analogy for understanding the energy transfer. Various empirical correlations for external free convection flows are presented, along with boundary layer similarity solutions and equations. The content includes examples of heat transfer calculations in different scenarios, such as condensation on brass tubes and cooling of electrical transformers.