Boundary-Layer Flow and Turbulence in Mass Transfer

9 BOUNDARY-LAYER FLOW AND TURBULENCE IN MASS TRANSFER 

9A Laminar Flow and Boundary-Layer Theory in Mass Transfer 

In Section 3.IOC 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 and in the fluid adjacent to the surface. 

We start by using the differential mass balance, Eq. (7.5-17), and simplifying it for steady state where dcjdt = 0, = 0, flow only in the x and y directions, so v. = 0, and 

F GORE 7 9 1 Laminar flow of fluid past a flat plate and concentration boundary layer. 

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Boundary-Layer Flow and Turbulence in Mass Transfer... 

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