There is a growing interest in using unbaffled stirred tanks for addressing certainprocessing needs. In this work, digital image analysis coupled with a suitableshadowgraphy-based technique is used to investigate the shape of the free-surfacevortex that forms in uncovered unbaffled stirred tanks.The technique is based on back-lighting the vessel and suitably averaging vortex shapeover time. Impeller clearance from vessel bottom and tank filling level are varied toinvestigate their influence on vortex shape. A correlation is finally proposed to fullydescribe vortex shape also when the vortex encompasses the impeller.
|Title of host publication||Chemical Engineering Transactions. Vol. 24|
|Number of pages||6|
|Publication status||Published - 2011|
|Name||CHEMICAL ENGINEERING TRANSACTIONS|
- General Chemical Engineering