Mass transfer coefficients in laminar flow around simple geometries

Mass Transfer Coefficients in Laminar Flow around Simple Geometries 

Mass transfer in fhe entry region is far from being a rare event. Transport in the larger blood vessels lies entirely in the entry region, and so does mass transfer in commercial reverse osmosis desalination plants and other membrane processes (see Chapter 8). Entry lengths of several meters are not uncommon, particularly for low solute diffusivities. The only requirement is that flow must be in the laminar regime (Re 2000). 

In the case of mass transfer involving laminar flow about simple geometries, no distinction is made between regions near the leading front of the particle and portions farther downstream. Instead, we report transfer coefficients averaged over the entire particle. The results are expressed as correlations of the Sherwood or Stanton numbers as a function of Reynolds and Schmidf numbers. 

The correlation for three simple geometries, the flat plate, the sphere, and the cylinder, are tabulated in Table 5.3. The flat plate here is taken to be positioned parallel to the direction of flow, while the cylinder has its axis normal to the flowing medium. 

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See also in sourсe #XX -- [ ]

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