There is a growing interest in using unbaffled stirred tanks for addressing certain processing needs. In this work, digital image analysis coupled with a suitable shadowgraphy-based technique is used to investigate the shape of the free-surface vortex that forms in uncovered unbaffled stirred tanks. The technique is based on back-lighting the vessel and suitably averaging vortex shape over time. Impeller clearance from vessel bottom and tank filling level are varied to investigate their influence on vortex shape. A correlation is finally proposed to fully describe vortex shape also when the vortex encompasses the impeller.
Vortex shape in unbaffled stirred vessels: Experimental study via digital image analysis / Busciglio A.; Grisafi F.; Scargiali F.; Daví M.L.; Brucato A.. - ELETTRONICO. - (2011), pp. 1387-1392. (Intervento presentato al convegno 10th International Conference on Chemical and Process Engineering tenutosi a Florence, ITALY nel MAY 08-11, 2011) [10.3303/CET1124232].
Vortex shape in unbaffled stirred vessels: Experimental study via digital image analysis
BUSCIGLIO, ANTONIO;
2011
Abstract
There is a growing interest in using unbaffled stirred tanks for addressing certain processing needs. In this work, digital image analysis coupled with a suitable shadowgraphy-based technique is used to investigate the shape of the free-surface vortex that forms in uncovered unbaffled stirred tanks. The technique is based on back-lighting the vessel and suitably averaging vortex shape over time. Impeller clearance from vessel bottom and tank filling level are varied to investigate their influence on vortex shape. A correlation is finally proposed to fully describe vortex shape also when the vortex encompasses the impeller.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
