ABSTRACT
In the previous chapter, we derived the microscopic balance equations governing the conservation of mass, energy, momentum, and charge. These balances were very complicated, and actual engineering situations rarely lend themselves to analyses using the full set of balance equations. Flows are most likely turbulent and require a full 3-D momentum treatment. The physical systems are often highly irregular in shape, so mass or heat balances cannot be simpli„ed. Finally, the media through which transport takes place are often multicomponent with properties varying as a function of position, temperature, and composition.
