Elementary NonSteady Phenomena
Because Transport deals with rates it is often the case
that we must consider nonsteady (or transient) operation (when the
rates do not exactly cancel). In this section, we examine
scalar transport (heat and mass transfer) where some
nonsteady problems can be simplified significantly.

 Explain the utility of the Biot number [18.1]

 Identify "regimes" of transient response based on the value of
the Biot number

 Use the "lumped" equation to solve "1D" transient heat transfer
problems [18.1]

 Use the "lumped" equation to solve "1D" transient mass transfer
problems [27.1]

 Use GurneyLurie charts to solve heat and mass transfer
problems [18.2, 27.4]

 Use the semiinfinite approximation to solve both transient
heat and mass problems for "short" times [18.1, 27.2]