Heat Transfer
Heat transfer lectures by Professor Josua Meyer (2014). Topics covered in the lectures include: transient or unsteady heat conduction, convection heat transfer, external and internal forced convection, heat exchangers, thermal radiation including atmospheric and solar radiation. The lectures are based on the textbooks of White (8th ed) and Cengel and Ghajar (4th ed) and were presented as part of a heat transfer class to the fourth year students of the Department of Mechanical and Aeronautical Engineering, University of Pretoria.
| Lecture 12 - Transient Heat Conduction: Contact of Two Semi-infinite Solids |
This lecture continues with unsteady/transient heat conduction. The lecture focuses on contact between two semi-infinite solids. The surface temperature between the two solids is derived. The influence of the surface temperature on the material properties is discussed. An example is considered of a person walking over a tiled floor, carpet and copper plate. The contact temperature, heat flux and heat transfer rates are discussed.
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