Chapter 18: Transient Heat Conduction

Lumped system analysis

when bodies have interior temperature that are uniform at any time during heat transfer. Temperature of these bodies are a function of time

Biot Number

The ratio of the convection at the surface to conduction within the body

lumped system analysis is applicable if Bi < 0.1

Requirements for use of one term approximate solution

body initially at uniform temperature surroundings must be constant and uniform

Fourier Number

larger it is the faster heat will propagate through a body

semi infinite solid

idealized body that has a single plane surface and extend to infinity in all direction