Lecture 04 (2014). Transient heat transfer. Lumped system approach

This lecture is an introduction to transient or unsteady heat conduction with emphasis on the lumped system approach. This lecture focuses on the Biot number and what it represents and when it can be used. Two examples were discussed and the focus was specifically on the ratio of the two resistance terms; the conduction resistance and the convection resistance. The strictness of the Biot number value of 0.1 was also highlighted. The characteristic lengths of plane walls, long cylinders and spheres were also

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