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Transport Processes and Separation Process Principles (Includes Unit Operations) Fourth Edition by Christie John Geankoplis

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7.3. MASS-TRANSFER COEFFICIENTS FOR VARIOUS GEOMETRIES

7.3A. Dimensionless Numbers Used to Correlate Data

The experimental data for mass-transfer coefficients obtained using various kinds of fluids, different velocities, and different geometries are correlated using dimensionless numbers similar to those for heat and momentum transfer. Methods of dimensional analysis are discussed in Sections 3.11, 4.14, and 7.8.

The most important dimensionless number is the Reynolds number NRe, which indicates degree of turbulence:

Equation 7.3-1

where L is diameter Dp for a sphere, diameter D for a pipe, or length L for a flat plate. The velocity ν is the ...

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