Abstract

AbstractThe process of fluid‐particle mass transfer in fixed beds at Reynolds numbers less than 1,000 is viewed in terms of transient molecular diffusion within a boundary layer which is developed and destroyed repeatedly as the fluid journeys through the bed. Literature data support the j factor derived from the premises of the model. The theory predicts a Schmidt number exponent of 2/3 for NSc ≧ 1; however this exponent should approach 1/2 for NSc < 1.

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