Abstract
The influence of different packing structures of packed bed particles on the fluid flow through packed beds was investigated. The flow through cylindrical packed beds consisting of mono-sized spherical particles was simulated using an explicit approach. These beds had cylinder to particle diameter ratios between 1.6 and 6.33. The results for the friction factor over a wide range of Reynolds numbers were compared with results from literature. It was found that the Eisfeld and Schnitzlein friction factor correlation was confirmed by the CFD results. The lower cylinder diameter to sphere diameter limit of the KTA friction factor correlation was also evaluated and adjusted. This adjustment was incorporated into a new formulation for the limiting line of the KTA equation, which is presented in this paper. It was further found that in the creeping flow regime the bed friction has an overwhelming effect on the pressure drop, whereas in the turbulent regime the inertial forces and the porous structure has the overwhelming influence.
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