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The rotating disc reactor : Mixing charakteristics of a novel reactor concept

Mixing is a crucial parameter for a wide range of processes in bio-/chemical engineering. In multiphase flows, the aim is a high and uniform mixing effect throughout the reaction volume without negative effects on the discrete phase. These are usually caused by the hydromechanical stress exerted by the mixing element. The present study introduces a novel reactor concept to overcome the use of fast rotating, locally acting mixing elements common in stirred tank reactors. Therefore, the reactor is designed of a flat, horizontally mounted cylinder, which enables mixing of the enclosed volume by its rotation around the central axis. To evaluate the mixing performance, a colorimetric method for mixing time determination is presented and the spatial evolution of mixing kinetics visualized. In addition, the method reveals the dependencies of the mixing time on the rotational speed and filling volume.

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