ABSTRACT
The theory of mass transfer allows for the computation of mass flux in a system and the distribution of the mass of different species over time and space in such a system. The most accurate technique for expressing these conservation laws and constitutive relations is to use differential equations to describe a system. Solving the equations that describe transport phenomena and interpreting the results are part of an effective technique to know the systems being considered. Chapter 4 starts with the introduction of the transport of a substance in liquid and gaseous media. The differential equations for mass transfer are applied to a differential control volume representing the system. The total continuity equation and the component continuity equation are employed to predict component concentration profile in various systems with different geometry, in the presence of reactive and nonreactive systems. Examples of various systems are derived and solved manually and numerically using Comsol Multiphysics 5.3a. In most cases analytical results and Comsol predictions are in good agreements.
