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Powder mixers often deploy blades of various kinds to impart convective motion to particles. Here, a single blade is followed through a bed, an...

Powder mixers often deploy blades of various kinds to impart convective motion to particles. Here, a single blade is followed through a bed, an arrangement that has increase text box size pdf been effective for understanding mixing, to investigate the effects of blade rake angle and blade speed on the blade-induced mixing behaviour of particles by means of the Discrete Element Method.

10 and then back to 0. This force is not affected by the blade speed in the range of 0. Convective mixing behaviour of particles is shown to be predictable by velocity-field based particle-motion simulations. Dynamic similarity is confirmed to occur in geometrically similar systems in the macroscopic quantities such as the non-dimensional horizontal force on the blade and scaled average horizontal particle velocity. Further, the single-blade model can be used to understand mixing in a vertically shafted two-bladed cylindrical mixer.

The results demonstrate the potential for utilising the results developed for the single-blade model in much complex industrial systems. The mixing behaviour of spherical particles in a bed due to an interacting single blade is investigated. The effects of blade speed and rake angle on particle flow and mixing are quantified. Convective mixing is shown to be the dominant mechanism for the system considered.

This simple system can be used to analyse particle mixing in complex bladed mixers. Check if you have access through your login credentials or your institution. Riparian floodplains in temperate regions are affected by pronounced seasonal variations in soil and water temperature. This affects the rates and interplay of microbial and abiotic geochemical processes that control the fate of metals in contaminated floodplain soils, including potential release into surface and groundwater during periodic flooding.

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