Transport Processes and Separation Process Principles (Includes Unit Operations) Fourth Edition

7.9. BOUNDARY-LAYER FLOW AND TURBULENCE IN MASS TRANSFER

7.9A. Laminar Flow and Boundary-Layer Theory in Mass Transfer

In Section 3.10C an exact solution was obtained for the hydrodynamic boundary layer for isothermal laminar flow past a plate, and in Section 5.7A an extension of the Blasius solution was also used to derive an expression for convective heat transfer. In an analogous manner we use the Blasius solution for convective mass transfer for the same geometry and laminar flow. In Fig. 7.9-1 the concentration boundary layer is shown, where the concentration of the fluid approaching the plate is c_A∞ and c_AS in the fluid adjacent to the surface.

Figure 7.9-1. Laminar flow of fluid past a flat plate and concentration boundary layer.

We start ...