Heat Transfer: Unsteady State

We have shown how heat travels through materials. However, the movement of heat does not necessarily imply a movement of temperature changes. In fact, in a steady state, heat flows with no temperature change with time at a particular point in a process. In this section, we will examine the unsteady state or transient heat transfer. Under unsteady-state conditions, the temperature within the material varies with time, and we will see what factors affect the migration of temperature changes through an object. All the heating transfer processes are initially under unsteady-state conditions.