Radial Mixing in a Packed Bed

Abstract

Radial mixing phenomena in a packed bed are described by the two-dimensional dispersion model in an entrance region. To determine the mixing parameters such as radial dispersion coefficient, Peclet numbers and characteristic length, experiments of measuring the concentration distribution of matter dispersed continuously from a point source were made for packed beds of various heights.
From the experimental results, the radial dispersion was expressed as the function of Reynolds number and mean diameter of glass beads. The reciprocal of the Peclet number was proportional to the square of the apparent intensity of the turbulence. Further, the product of axial and radial Péclet numbers was nearly constant for Reynolds numbers above 50.