Mass Transfer Processes: Modeling, Computations, and Design

Chapter 14. Mesoscopic Models and the Concept of Dispersion

Learning Objectives

After completing this chapter, you will be able to:

• Understand how mesoscopic models result from a cross-sectional averaging of differential models.

• Identify additional parameters that result upon averaging.

• Explain the meaning of the dispersion coefficient.

• Model and solve reactor models using the dispersion concept.

• Understand the usefulness of the transient response data to determine the dispersion coefficient.

• Understand the classical work of the Taylor model for axial dispersion in laminar flows.

• Model and solve cocurrent and countercurrent mass exchangers using the dispersion coefficient for each of the phases.

Mesoscopic models use one spatial coordinate ...