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 03 - Unsteady Heat Transfer: Lumped System |
This lecture is an introduction to transient or unsteady heat conduction with emphasis on the lumped system approach. The equation that models a lumped system was derived and two examples were done. The one example was for a small sphere made from stainless steel and the other example was on the cooling of a bear can. The Biot number was also introduced as a criterion on the applicability of a lumped system approach.
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