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Rotational speed change and reverse mixing to avoid baffles in dispersing processes

  • Stirring is used for mass and heat transfer, particle suspending or similar processes. It is commonly conducted in a steady operation mode. This paper targets on performing the stirring process dynamically by reversing the rotation direction to introduce additional turbulences and hence accelerating the dispersing processes. The power introduced into the fluid as well as mixing kinetics performing dynamic mixing were studied based on the rotational acceleration, blade pitch angle, liquid volume and duration of the rotational speed direction interval for a vessel equipped with a turbine agitator with and without baffles. Experiments show that baffles are not necessary if reverse mixing is performed at a specific frequency.

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Metadaten
Author:B. Schwarz, M. C. Ortler, J. A. Lindner
DOI:https://doi.org/10.1016/j.cherd.2024.05.004
Parent Title (English):Chemical Engineering Research and Design
Document Type:Article (peer reviewed)
Language:English
Publication Year:2024
Tag:agitating; dispersion; dynamic mixing; reverse mixing; rotational direction change; stirring