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Mixing Analysis

Mixing devices are commonly used in chemical and bio-medical industries. Traditional mixers generally use a bladed rotor at the bottom of the tank to provide momentum exchanges between different materials through centrifugal forces to achieve a desired homogeneous state in either material composition or temperature, sometimes both.

Alternative mixing methods have been developed adopting a turbulent jet momentum mixing approach. Instead of the traditional rotor, a perforated disc moving up and down in the mixing tank creates jets through the holes to provide mixing effects. The CFD analysis for the mixer flowfield involves moving mesh / moving boundary for multi-component flows. The computational results are used provide design guidelines for parameters such as placement and sizes of the holes, size of the disc, moving speed, driving function, etc. The following figures show the streamline pattern when the disc is at several locations.